Motor Final m

8/18/2019 Motor Final m

1/123

1. Which standards govern the specifications for supply of Residual Marine Fuels and Distillate Marine

Fuels onboard merchant ships?

A. ISO 3012:1999

B. ISO 3648:1996

C. ISO 8216-1:2010

D. ISO 8217:2010

2. Cran !eb deflection readings !ill give a positive indication of

A. worn main bearing jorna!"

B. #or"iona! "#re"" $e%orma#ion

C. "!a&' #(r"# bearing"

D. bearing "(e!!" "(im $imen"ion"

". #$D stands for !hich type of boiler

A. )*#erna! "+er(ea#er D-#,+e

B. )mergen&, "(#$own Boi!er

C. )*#reme S+er(ea# #,+e

D. )*#erna! S+er(ea# De-"+er(ea#er #,+e

%. &he advantage of tie rods over an engine !ithout tie rods is that'

A. (e engine i" er, ea"i!, a!igne$ a%#er an, mi"a!ignmen# (a" #a'en +!a&e be#ween $i%%eren# &om+onen#" o%

#(e engine


2/123


3/123


4/123

C. #(e o!me o% air +a""ing #(rog( in#a'e a!e" i" !e"" #(an #(e o!me o% air +a""ing #(rog( e*(a"#

a!e"

D. in#a'e a!e" are !e"" a%%ee$ #o #(e &orro"ie aion o% e*(a"# ga"e"

11. Why is it essential to rene! turbocharger bearings after a preset number of hours of running even if

the bearings are in seemingly perfect condition?

A. Be&a"e #(e, are +rone #o %ai!re $e #o +ro!onge$ e*+o"re #o (ig( #em+era#re &on$i#ion".

B. Be&a"e #(e, are "bje #o &,&!i& !oa$ing an$ are +rone #o %ai!re $e #o me#a! %a#ige.

C. I# i" no# e""en#ia! #o renew i% &on$i#ion moni#oring "gge"#" +er%e &on$i#ion.

D. be oi! &on#amina#ion i" bon$ #o o&&r an$ a%%e #(e &on$i#ion o% #(e bearing".

12. Which of the follo!ing statements is true?

A. (e ro#ar, ane #,+e "#eering gear genera!!, o+era#e" a# (ig(er oi! +re""re" #(an #(e ram #,+e.

B. (e ram #,+e "#eering gear genera!!, o+era#e" a# (ig(er oi! +re""re" #(an #(e ro#ar, ane #,+e.

C. Bo#( ram #,+e an$ ro#ar, ane #,+e "#eering gear" genera!!, o+era#e a# "imi!ar oi! +re""re"

D. one o% #(e aboe

1(. Modern marine turbochargers use a 55555555555 type of compressor

A. 5a$ia! %!ow

B. A*ia! %!ow

C. i*e$ %!ow


5/123

D. rb!en# %!ow

1*. Which of the follo!ing is a disadvantage of !ater as cooling medium for pistons3 !hen compared to

oil?

A. C(emi&a! #rea#men# i" reire$

B. ig(er #(erma! "#re""e" in +i"#on

C. i"#on o% more &om+!i&a#e$ $e"ign

D. A!! o% #(e aboe

1, -o! is the concentration of dissolved o)ygen in the feed !ater of an au)iliary boiler maintained at

acceptable limits?

A. ee$ wa#er i" &,&!e$ #(rog( a DC (ea#er.

B. ee$ wa#er i" #rea#e$ wi#( +(o"+(a#e".

C. O*,gen i" !ibera#e$ in #(e #(ree-"#age" o% %ee$ wa#er +re(ea#ing.

D. O*,gen i" !ibera#e$ b, main#aining #(e (ig(e"# +rai&a! %ee$ wa#er #em+era#re

1/. +n a 24stroe marine diesel engine if the o4ring for 6acet cooling !ater sealing is leaing then

A. (e wa#er wi!! !ea' $ire!, in#o #(e &ran'&a"e

B. (e wa#er wi!! !ea' in#o #(e n$er +i"#on "+a&e

C. (e wa#er wi!! &ome o# #(rog( #e!!-#a!e (o!e +roi$e$ be#ween #(e #wo o-ring"

D. (e wa#er wi!! &ome o# %rom #(e #o+ o% &,!in$er ja&'e#

10. &he lube oil pump used in a diesel engine is a

A. o!#e +m+


6/123

B. &en#ri%ga! +m+

C. $ia+(ragm +m+

D. gear +m+

2. 7rior to lighting off a cold automatically fired au)iliary boiler3 you should

A. &(e&' an$ reg!a#e #(e wa#er !ee!

B. &!o"e #(e air &o&' on&e %ire" are !i#

C. b!ow $own #(e gage g!a""

D. &ra&' #(e "#eam "#o+ #o a""re +ro#eie "#eam %!ow

21. $team temperature control for the #$D4++ boiler is achieved by '

A. i##ing a $e-"+er(ea#er be#ween 1"# 2n$ +a""e" o% "+er(ea#er

B. i##ing an a##em+era#or be#ween 1"# 2n$ +a""e" o% "+er(ea#er

C. ;a" $am+er" in boi!er +#a'e

D. B,+a""ing #(e "+er(ea#er

22. &he coating !hich is provided on the valve stem of e)haust valves of modern marine diesel engines is

of'

A. i&'e!

B. S#e!!i#e

C. C(romim

D. imoni&


7/123

2". +f the combustion control system of an automatically fired au)iliary boiler fails to sustain burner

ignition after a normal shutdo!n3 you should chec for a8an

A. %a!#, +(o#o&e!! $e#eor

B. !ow "#eam +re""re

C. (ig( o!#age on #(e igni#ion e!ero$e

D. o+en air $am+er

2%. Which of the follo!ing statements is true3 about slo! speed engines?

A. A "&aenge %ire &an !ea$ #o a &ran'&a"e e*+!o"ion

B. A "&aenge %ire &an !ea$ #o $e%orma#ion o% $ia+(ragm +!a#e

C. A "&aenge %ire &an !ea$ #o $amage #o #ie ro$".

D. A!! o% #(e aboe.

2(. For a t!o stroe engine t!o o4rings are provided on the liner. &he function of the top o4ring is to

55555555555 and function of the lo!er o4ring is to 555555555555

A. Sea! ja&'e# &oo!ing wa#er< a a" "e&on$ar, "ea! in &a"e 1"# o-ring !ea'"

B. Sea! ja&'e# &oo!ing wa#er Sea! "&aenge air

C. Sea! "&aenge air Sea! =a&'e# &oo!ing wa#er

D. Sea! &omb"#ion ga"e" Sea! ja&'e# &oo!ing wa#er

2*. #ven if there is an oil mist concentration inside a crancase3 and there is also a hot spot3 crancase

e)plosion !ill only tae place !hen


8/123

A. (e (o# "+o# +roi$e" #(e igni#ion #em+era#re %or #(e oi! mi"# &on&en#ra#ion

B. >(en #(e oi! mi"# - air mi*#re i" in #(e %!ammab!e range

C. Bo#( A an$ B

D. one o% #(e aboe

2,. Which of the follo!ing conditions is responsible for the fuel oil to atomi9e !hen using a steam

atomi9er in an au)iliary boiler?

A. )*+an"ion o% #(e "#eam in #(e %rna&e.

B. )*+an"ion o% #(e "#eam in #(e w(ir!ing &(amber.

C. )*+an"ion o% #(e "#eam in #(e ori%i&e +!a#e.

D. A!! o% #(e aboe.

2/. $ome %4stroe engines are fitted !ith a rotorcap on the cylinder head valves. For !hat reason?

A. 5o#a#e #(e in!e# a!e $ring o+era#ion.

B. Di"#rib#e #(e e*(a"# ga" or #(e air in!e# be##er #o im+roe &omb"#ion.

C. Im+roe #(e "&a!ing "r%a&e %nion in&rea"e #(e "eri&e #ime o% #(e e*(a"# a!e in #(e engine

D. o +reen# #(e a!e "+in$!e %rom "#i&'ing

". $haft tunnel re:uires

a; drain

b; escape trun

c; !ater tight door

d; all the above


9/123

"1. What do you mean by surge limit of a turbocharger?

oining all the points of ma)imum pressure on compressor characteristic curves 3 dra!n

at various speeds of operation

D. Ma)imum rpm limit of &8C above !hich surging !ill start

"2. < large3 lo!4speed3 main propulsion diesel engine uses sea !ater to directly cool the

ectors

"". #)haust rouping is re:uired in case of 55555555555555 turbocharging in order to


10/123

ection

=. #arly start of in>ection and late end of in>ection

C. #arly start of in>ection and early end of in>ection

D. Aate start of in>ection and late end of in>ection

"/. Aabyrinth seal fitted on the bac surface of a compressor !heel of a turbocharger'


11/123

C. -elps to eep the shaft cool by controlled leaage of air

D. @one of the above

"0. +t is a no!n fact that centrifugal pumps re:uire priming for pumping li:uids 3 as they cannot handle

air and !ill lose suction due to air entry . =ut on the other hand &8Cs use centrifugal

compressors for supercharging. Which of the follo!ing do you thin maes a centrifugal

compressor to pump air and behave differently than the centrifugal pumps?


12/123

C. (in #o+ +or#ion #o re$&e #(erma! gra$ien#" an$ (en&e #(erma! "#re""e" w(i!e "++or#ing rib" #o #a'e &are o%

me&(ani&a! "#re""e"

D. (i&' #o+ +or#ion #o #a'e &are o% (ig( me&(ani&a! "#re""e" wi#( ja&'e# &oo!ing &ombine$ wi#( a!!owan&e %or

#(erma! e*+an"ion #o minimie #(e #(erma! "#re""e"

%2. Which of these fuel oil impurities can cause ma)imum abrasive damage?

A. >a#er

B. A"(

C. Ca#a!,#i& %ine"

D. So$im

%". +n modern marine 24stroe diesel engines3 5555555555555555 is sometimes used as a coating on the

underside of the e)haust valve disc3 to reduce the rate of hot corrosion.

A. one!

B. C(romim

C. In&one!

D. Cerme#

%%. +rregular circumferential !ear of liner due to diminishing neutrali9ing capacity of cylinder oil a!ay

from lubricating holes is no!n as'

A. i&ro "eire

B. S&%%ing

C. S&oring


13/123

D. C!oer !ea%ing

%(. Which of the follo!ing is a reasonable statement about !ater !ashing of turbine side of a &8C ?

A. I# !ea$" #o #(erma! "(o&' an$ re$&e" #(e !i%e o% #(e ?C

B. I# !ea$" #o #(erma! "(o&' an$ no# "o e%%eie a" "o!i$ wa"(ing

C. I% +ro+er!, &arrie$ o# 'ee+ing r+m !oa$ #em+era#re !imi#" o#(er %aor" in#o a&&on#< i# i" i#e

"a%e an$ more e%%eie #(an "o!i$ wa"(ing

D. I# "(o!$ neer be &arrie$ o# a" mo"# o% #(e engine man%arer" re&ommen$ again"# #(e "ame

%*. Which of the follo!ing statements correctly describes the phenomenon of surging in a 24stroe

crosshead type engine?

A. De #o "$$en in&rea"e in engine !oa$ #(e e*(a"# ga"e" ma, %!ow ba&' #(rog( "&aenge +or#"

&a"ing "rge

B. De #o "$$en $e&rea"e in engine !oa$ #(e #rbo&(arger +re""re ra#io $ro+" . (i" &a"e" (ig(

+re""re $own"#ream o% ?C in "&aenge #rn' &a"ing %!ow reer"a! o% "&aenge air

C. De #o "$$en in&rea"e in engine !oa$ #(e ?C #rbine r+m ma, in&rea"e "$$en!, in&rea"ing #(e

&om+re""or +re""re ra#io #o "rge

D. De #o "$$en $e&rea"e in engine !oa$ #(e #rbo&(arger ma, "#a!! a" #(e (ig(er +re""re $own"#ream

in e*(a"# ","#em ma, &a"e reer"a! o% %!ow o% e*(a"# ga"e"

%,. +f the boiler tubes are scaled on the !ater side then

A. ea# &on$ion #(rog( #(e #be" wi!! be er, (ig( !ea$ing #o ra+i$ ea+ora#ion

B. (e boi!er %rna&e &an ge# $amage$ $e #o e*&e""ie #em+era#re"

C. (e "r%a&e o% #(e #be wi!! be oer(ea#e$ a" (ea# #ran"%er i" im+aire$


14/123

D. (e na#ra! &ir&!a#ion o% wa#er wi#(in #(e boi!er wi!! be more e%%i&ien#

%/. Fins are installed on the generating tube surfaces in !aste heat boilers to

@A reen# "oo# %ire" in #(e e*(a"# ","#em

@B reen# e*(a"# ga" ero"ion o% #(e #be"

@C In&rea"e #(e e!o&i#, o% e*(a"# ga" %!ow

@D In&rea"e #(e ra#e o% (ea# #ran"%er

%0.


15/123

C. De#ergen&,

D. S+e&i%i& grai#,

(2. What is meant by elastohydrodynamic lubrication?

A. orma#ion o% (,$ro$,nami& %i!m n$er (ig( +re""re wi#( minor e!a"#i& $e%orma#ion o% ma#ing

"r%a&e" $i"#rib#ing !oa$ oer a grea#er area

B. A$$i#ion o% e*#reme +re""re a$$i#ie @) #o #(e !bri&an#

C. A$$i#ion o% i"&o"i#, in$e* im+roemen# a$$i#ie

D. A$$i#ion o% e!a"#omer ba"e$ a$$i#ie"

(". +n a bypass type filtering system for a medium or high speed diesel engine3 the lube oil bypassing the

filter

A. re#rn" $ire!, #o #(e "ion "i$e o% #(e +m+

B. re#rn" $ire!, #o #(e "m+

C. %!ow" #o #(e engine bearing"

D. %!ow" #(rog( a "e&on$-"#age "#rainer re(ea#er an$ re#rn" #o #(e "m+

(%. Which type of boiler burner has ma) turn do!n ratio?

a. re""re "e#

b. "+inning &+

&. S+i!! #,+e

$. -je# #,+e


16/123

((. Most steam traps respond !ell to cleaning. =ut !hen a thermodynamic trap fails to operate after

cleaning3 the ne)t course of action should be

A. #(ro##!e #(e "#eam o#!e# a!e

B. renew #(e #ra+

C. !a+ #(e $i"& an$ "ea# #(e #ra+

D. #(ro##!e #(e "#eam in!e# a!e

(*. &ypes of corrosion in fresh !ater of D8#

a. $tress

b. hot corrosion

c. bimetallic

d. selective phase corrosion

(,. Which of the follo!ing types of damages are metal seatings of a valve sub>ect to? Choose the correct

alternative.


17/123

B. .O. in a+or !o&' in"i$e (ea#er a!!ow "#eam

C. .O. in!e# a!e &a"e" +re""re $ro+ ?) .O. +re""re "#an$b, wa#er i" no# +re""rie$ ma, &a"e

"$$en &(ange in engine ?+er !oa$?r+m

D. (ea#er !ea'ing.

(0. Biscosity of fuel oil used for M# !as 1%(cst3 ne! fuel comes !hose viscosity !as more than earlier3

!hat u should do

a In&rea"e #em+ "e##ing

b C(ange "e##ing o% i"&o#(erm

& Do no#(ing

$ O+en "#eam a!e mana!!, more

*. Which of the follo!ing can be done to reduce the cold corrosion of Main #ngine cylinder liners using

high sulphur fuel oil +f multi choice add First three options;

A. In&rea"ing &,!in$er oi! %ee$ ra#e

B. E"ing (ig( B &,!in$er oi!

C. In&rea"ing "&aenge air #em+era#re

D. De&rea"ing &,!in$er oi! %ee$ ra#e

*1. When m8e is running in emergency condition !hich of the alarms cant be bypassed

1. O !ow +re""re

2. =a&'e# wa#er (ig( #em+

3. i"#on &oo!ing wa#er (ig( #em+


18/123

4. A!! #(e aboe

*2. Which of the follo!ing !ill be re:uired to be done in order to reduce sulphur corrosion of main

#ngine Components?

A. In&rea"ing #(e a#omia#ion +re""re o% %e! injeor"

B. i##ing e*(a"# a!e" wi#( a!e ro#a#or"

C. 5nning engine a# or near norma! "ea !oa$

D. De&rea"ing #(e .O. +ri%ier %ee$ ra#e rnning #wo +ri%ier in "erie" one aing a" +ri%ier an$ o#(er

a" &!ari%ier

*". Where boiler point temp high?

A 5i"er

b S+er(ea#er

& rimar, "#eam $rm

$ Se&on$ar, "#eam $rm

*%. $udden stop of diesel engine multiple choices;

A. air in ","#em

B. wa#er in ","#em

C. air %i!#er &(o&'e$

D. wa#er in air %i!#er

*(. Mi)ed lubrication consist of

1. i* #wo !be" oi!


19/123

2. Con#imani#iFn o% (,$ro$,nami& !be oi!.

3. i*e$ grea"e an$ oi!

**. &he muffling of e)haust gas noise in % stroe au)iliary engines in achieved by

@a A!!owing #(e ga" #o e*+an$.

@b C(ange #(e $ireion o% #(eir %!ow.

@& Coo! #(e ga" wi#( injee$ wa#er.

@$ Coo! #(e ga" wi#( "&aenge air.

*,.


20/123

@a 5e$&e weig(# o% #(e engine.

@b 5e$&e b!' o% #(e engine.

@& In&rea"e e*i"#ing +ower.

@$ In&rea"e +i"#on "+ee$.

@e 5e$&e %e! &on"m+#ion.

,1. When using lo! sulfur fuel oil for #mission Control


21/123

C. o!e ring b!a$e

D. Di%%"er ring b!a$e

,%. &he primary function of a flame safeguard system3 as used on an automatically fired au)iliary boiler3

is to prevent

A. a&&i$en#a! $r, %iring an$ oer+re""re

B. n&on#ro!!e$ %ire" in #(e %rna&e

C. e*+!o"ion" in #(e boi!er %rna&e

D. e*+!o"ion" in #(e boi!er %rna&e

,(. Directional intae ports in diesel engines are used to

A. re$&e air &(arge #rb!en&e

B. in$&e air "wir!

C. $e%!e (o# &omb"#ion ga" awa, %rom #(e a!e"

D. o++o"e #(e e%%e" o% +i"#on in$&e$ "i"(

,*. Why does a chain stretch in service?

A. De #o +!a"#i& e!onga#ion

B. De #o (ig( #em+era#re e*+an"ion

C. De #o wear on ro!!er" an$ b"(e"

D. De #o #(e +(enomenon o% &ree+

,,. Which of the follo!ing methods is normally used to lubricate bearings in a small high4speed diesel

engine?


22/123

A. S+!a"( !bri&a#ion

B. re""re !bri&a#ion

C. Sig(# %ee$ !bri&a#or"

D. e&(ani&a! !bri&a#or"

,/. #)ternal fouling of boiler tubes can lead to'

A. ;rea#er "#eam genera#ion

B. be &orro"ion

C. be )ro"ion

D. ro#eion o% #be again"# &orro"ion

,0. What is the purpose of the inlet grid provided !ithin the e)haust gas casing in the gas flo! path3 prior

entry to turbocharger ?

A. o %i!#er o# an, nbrne$ &arbon

B. o ab"orb an$ $am+en #(e +re""re %!a#ion

C. o re$&e noi"e in #(e &on"#an# +re""re e*(a"# +i+ing

D. o +reen# an, bro'en +i"#on ring" %in$ing #(eir wa, #o #rbine

/. &he main function of tie rods in the construction of large3 lo! speed diesel engines is to

A. "#i%%en #(e be$+!a#e in wa, o% #(e main bearing" #o in&rea"e #(e engine" !ongi#$ina! "#reng#(

B. a&&e+# mo"# o% #(e #en"i!e !oa$ing #(a# re"!#" %rom #(e %iring %or&e" $ee!o+e$ $ring o+era#ion

C. mon# #(e engine %rame "e&re!, #o #(e (!! #o +reen# "(a%# &o+!ing mi"a!ignmen#

D. &onne #(e &ro""(ea$ "o!i$!, #o #(e +i"#on ro$


23/123

/1. &he fall in speed that occurs in a diesel engine e:uipped !ith governor3 on increase of load is called'

A. O%%"e#

B. S+ee$ $ro+

C. S+ee$ $roo+

D. S+ee$ o%%"e#

/2. Which of the follo!ing factors governs the lo!er limit of thrust bearing clearance?

A. o a!!ow "ome oi! !ea'age #o +reen# oer(ea#ing

B. 5e$ion o% oi! i"&o"i#,

C. A!ignmen# o% &ran'"(a%#

D. o a!!ow #(e #(r"# +a$" #o #i!# an$ genera#e #(e oi! we$ge

/". Which of the follo!ing can result in cracing of piston cro!n?

A. De+o"i#" in &oo!ing "+a&e"

B. Im+ingemen# o% %e! $e #o %a!#, injeion

C. In"%%i&ien# +i"#on &oo!ing oi! %!ow

D. A!! o% #(e aboe

/%. &he boiler !ater alalinity in a coil4type au)iliary boiler should be maintained at the p-

recommended by the boiler manufacturer to

A. +re&i+i#a#e "i!i&a %rom "o!#ion

B. re$&e &orro"ion in #(e (ea#ing &oi!

C. +reen# &!ogging an$ ero"ion in #(e &oi!


24/123

D. main#ain ero wa#er (ar$ne""

/(. What does the @A+ number of a grease indicate?

A. (e o*i$a#ion re"i"#an&e o% #(e grea"e

B. (e &on"i"#en&, o% #(e grea"e i.e (ow %!i$ or non %!i$

C. Dem!"ibi!i#, o% #(e grea"e

D. (e "(e!% !i%e o% #(e grea"e

/*. Which of the follo!ing layers of a thin shell bearing gives it its fatigue strength?

A. (e oer!a,

B. (e in#er!a,

C. (e ba&'ing

D. (e barrier !a,er

/,. Which of the bearings listed is most !idely used for main and connecting rod bearings of modern

diesel engines?

A. S#ee!-!ine$

B. ore$ babbi## "e!%-a!igning

C. S+!i# ro!!er

D. re&i"ion in"er#

//. Which of the follo!ing statements is false?

A. (e %e! oi! "!%r !ee! i" one o% #(e im+or#an# &ri#eria %or &(oi&e o% B !ee! o% &,!in$er oi!.

B. (e "e o% an#i-+o!i"(ing ring" or %!ame ring" in&rea"e" #(e &on"m+#ion o% &,!in$er oi!


25/123

C. )*&e""ie &,!in$er oi! %ee$ &an !ea$ #o (arm%! $e+o"i#" in +i"#on #o+ !an$ area

D. one o% #(e aboe

/0. When preparing to light off a cold boiler e:uipped !ith a return flo! fuel oil system3 the recirculating

valve directs the flo! of oil

A. $ire!, #o #(e %e! oi! (ea#er in!e# %or %r#(er warm-+

B. ba&' #o #(e %e! oi! "e##!er %or %r#(er %i!#ra#ion

C. ba&' #o #(e "ion "i$e o% #(e "eri&e +m+

D. $ire!, #o #(e $ee+ #an'"

0. 7rompt correction of speed of diesel engines driving alternators3 !ithout having massive fluctuations

is ensured by incorporating'

A. oa$ !imi#ing $ei&e"

B. oa$ "(aring $ei&e"

C. oa$ "en"ing $ei&e"

D. oa$ "(e$$ing $ei&e"

01. +n a uniflo! scavenged marine 24stroe diesel engine3 the scavenge ports in a cylinder liner are

machined

A. On!, %or a +ar# o% #(e &ir&m%eren&e a# an ang!e a!mo"# #angen#ia! #o #(e &ir&m%eren&e o% #(e !iner

B. A!! aron$ #(e &ir&m%eren&e a# rig(# ang!e" #o #(e &ir&m%eren&e o% #(e !iner

C. on!, %or a +ar# o% #(e &ir&m%eren&e a# rig(# ang!e" #o #(e &ir&m%eren&e o% #(e !iner

D. A!! aron$ #(e &ir&m%eren&e a# an ang!e a!mo"# #angen#ia! #o #(e &ir&m%eren&e o% #(e !iner


26/123

02. +f the tappet clearance bet!een the rocer arm tappet and e)haust valve stem is e)cessive then'

A. (e a!e wi!! o+en ear!, an$ &!o"e !a#er

B. (e a!e wi!! o+en !a#er an$ &!o"e ear!,

C. (e a!e wi!! o+en an$ &!o"e !a#er

D. (e a!e wi!! o+en an$ &!o"e ear!,

0". +n order to reduce thermal loading on the upper part of the liner and increase the effectiveness of

cylinder lubrication3 modern 24stroe marine diesel engines are designed to have'

A. Cerme# &oa#e$ +i"#on ring" bore &oo!e$ !iner" an$ ni%!ow "&aenging

B. ig( #o+ !an$ o% +i"#on &rown an$ $ee+er &,!in$er &oer wi#( #o+ !an$ o% &rown e*#en$ing in#o

&,!in$er &oer a# DC

C. ow #o+ !an$ o% #(e +i"#on &rown wi#( bore &oo!e$ &,!in$er !iner

D. Bore &oo!e$ &,!in$er !iner an$ bore &oo!e$ +i"#on &rown wi#( #oroi$a! "(a+e &omb"#ion &(amber

0%. Which of the follo!ing conditions can lead to reduced po!er developed by a main engine?

A. ig( "&aenge air #em+era#re

B. C(o'e$ air "ion %i!#er o% a #rbo&(arger

C. B!ow +a"# in one or more ni#"

D. A!! o% #(e aboe.

0(. Which of the follo!ing types of diagrams !ould give an indication of effectiveness of e)haust and

scavenge processes?

A. ower &ar$


27/123

B. Draw &ar$

C. ig(# "+ring $iagram

D. A!! o% #(e aboe.

0*. &he arrangement used to protect overheating of the superheaters under fluctuating loads is called

A. De-"+er(ea#er

B. A##em+era#or

C. S#eam $m+ing a!e

D. ee$ (ea#er

0,. 7iston rod stuffing bo) scraper rings butt clearances should'

A. o# #o be a!!owe$ #o %a!! be!ow G0H o% origina! &!earan&e

B. o# #o be a!!owe$ #o in&rea"e aboe G0H o% origina! &!earan&e

C. o# #o be a!!owe$ #o %a!! be!ow man%arer re&ommen$e$ a!e

D. o# #o be a!!owe$ #o in&rea"e aboe man%arer re&ommen$e$ a!e

0/. +n a 24stroe engine a 5555555555555555 separates the under piston space from the crancase.

A. A-%rame

B. Cro""(ea$

C. Dia+(ragm

D. S&aenge "+a&e

00. Fusible plugs are installed in fire4tube boilers to


28/123

A. +roi$e a mean" o% $raining #(e boi!er

B. warn #(e engineer o% !ow wa#er !ee!

C. &oo! #(e &rown "(ee# a# (ig( %iring ra#e"

D. o+en #(e brner" e!eri&a! %iring &ir&i#"

1. Which of the follo!ing gauges are generally used to evaluate main bearing clearances?

A. o'er gage

B. ee!er gage

C. e!e"&o+i& %ee!er gage

D. Dia! gage

11. +n a coil4type au)iliary !ater4tube circulation boiler

A. nea+ora#e$ %ee$wa#er &o!!e" in #(e bo##om o% #(e %!a"( &(amber

B. a!! genera#e$ "#eam i" re&ir&!a#e$ #(rog( (ea#ing &oi!" in #(e boi!er

C. (ea#e$ wa#er %!a"(e" #o "#eam in #(e boi!er (ea#ing &oi!"

D. re"+on"e #o "#eam $eman$ i" "!ower #(an in a %ire-#be boi!er

12. For a continuous operation diesel engine3 a duple) filter unit !ould be the best arrangement because

A. &(anging %i!#er e!emen#" wo!$ no# in#err+# engine o+era#ion

B. %i!#ering o&&r" #wi&e in ea&( +a"" o% oi! #(rog( #(e ","#em

C. &!ogging wi!! no# o&&r

D. $ro++ing +re""re i" (a!% o% #(a# #(rog( a "ing!e %i!#er ni#


29/123


30/123

C. remoe$ %rom em!"i%ie$ %e! oi! $ring #(e &en#ri%ging +ro&e""e"

D. A!! o% #(e aboe are &orre.

1,. &he function of the tie rods is to'

A. ee+ #(e engine &om+onen#" n$er #en"ion a# a!! #(e #ime"

B. ="# "e&re #(e engine +ar#" #oge#(er

C. A a" (o!$ing $own bo!#" %or #(e be$+!a#e an$ 'ee+" a!! #(e engine &om+onen#" #oge#(er

D. ee+ engine &om+onen#" n$er (ig( &om+re""ion "o #(a# #en"i!e "#re""e" aing $ring %iring "#ro'e

$o no# e*&ee$ #(i" +re-&om+re""ion #o aoi$ %a#ige %ai!re

1/. Which of the follo!ing types of cranshafts is much lighter at similar po!er re:uirements?

A. !!, bi!# #,+e

B. Semi bi!# a!! we!$e$ #,+e

C. Semi bi!# #,+e

D. So!i$ %orge$ #,+e

10.


31/123

A. "#ore$ a# #(e re%iner,

B. "#ore$ on #(e e""e!

C. #ran"+or#e$ #o #(e $i"#rib#ion "i#e"

D. A!! o% #(e aboe are &orre.

111. Which of the follo!ing statements is false?

A. )*&e""ie &,!in$er !iner !bri&a#ion &an aggraa#e "&%%ing.

B. E"e o% an#i +o!i"(ing ring re$&e" "&%%ing.

C. Dee+ (oning o% !iner %ai!" #o gie an i$ea! !iner "r%a&e.

D. one o% #(e aboe

112. +n a fully built or semi built type cranshaft3 ho! can any slippage at shrin fit be identified?

A. B, in"+eing #(e !o&'ing arrangemen# +roi$e$

B. B, &(e&'ing #(e $owe! +roi$e$.

C. B, &(e&'ing #(e wi#ne"" mar' +roi$e$ %or re%eren&e .

D. B, &(e&'ing #(e +er%orman&e o% #(e engine

11". Which of the follo!ing is one of the ma>or advantages of resin choing over cast iron choing3 in

holding do!n arrangements of modern diesel engines?

A. Be##er ibra#ion $am+ing +ro+er#ie".

B. Be##er &om+re""ie "#reng#(

C. 100H &on#a no nee$ %or "r%a&e +re+ara#ion

D. one o% #(e aboe


32/123

11%. +n a 24stroe crosshead type of engine3 the side thrust generated due to rolling and connecting rod

and fore4aft thrust due to pitching motion of the ship is taen care of by the'

A. i"#on an$ #(e !iner

B. Conneing ro$ an$ #(e +i"#on ro$

C. Cro""(ea$ "(oe" an$ gi$e"

D. Cran'+in an$ #(r"# bearing

11(. +n a B+& e:uipped >er type fuel pump'

A. 5ai"ing #(e barre! $e!a," beginning o% injeion

B. owering #(e barre! $e!a," beginning o% injeion

C. 5ai"ing #(e barre! $e!a," en$ o% injeion

D. owering #(e barre! $e!a," en$ o% injeion

11*. &he over speeding of the diesel engine driving an electric generator could cause

A. !ow o!#age #ri+ #o #ri+

B. reer"e +ower #ri+ #o #ri+

C. $amage #o win$ing"

D. e*&e""ie e*(a"# #em+era#re"

11,. +n a large3 slo!4speed3 main propulsion diesel engine3 !hich of the parts listed is under tension !hen

the engine is running?

A. Be$ +!a#e

B. Co!mn


33/123

C. )n#ab!a#re

D. ie ro$

11/. < diffuser is provided at the end of a mechanical atomi9er in boiler onboard

A. o +reen# b!ow ba&' o% #(e %!ame

B. o mi* #(e air an$ %e! +ro+er!,

C. o +reen# b!ow o# o% #(e %!ame

D. o eje #(e e*&e"" %me" %rom #(e a#omier

110. $team stop valve is eased of its seat during boiler start up from cold

A. o a!!ow #(erma! e*+an"ion o% +ar#"

B. o a!!ow "#eam %!ow $ring "#ar# +

C. o +reen# wa#er (ammer

D. A!! o% #(e aboe

12. Which of the follo!ing statements about the design of D4 type boilers3 is false ?

A. (e (eaier wa#er in #o+ $rm %!ow" ba&' #o #(e bo##om $rm #(rog( #(e $own- &omer" o#"i$e #(e

%rna&e

B. In"i$e #(e %rna&e #(e wa#er i" (ea#e$ + in #(e ri"er"

C. (e ++er $rm i" #(e "#eam?wa#er $rm an$ #(e !ower one i" #(e wa#er $rm.

D. (e %ee$ wa#er i" +m+e$ in#o #(e !ower $rm

121. 7resence of catalytic fines in fuel oil is significant to engineers on board because

A. Ca#a!,#i& %ine" #en$ #o im+air +ro+er o+era#ion o% +ri%ier"


34/123

B. Ca#a!,#i& %ine" !ea$ #o abra"ie wear in !iner" +i"#on ring" an$ %e! injeion ei+men#

C. Ca#a!,#i& %ine" ne&e""i#a#e in&rea"e in injeion #em+era#re

D. Ca#a!,#i& %ine" ne&e""i#a#e in&rea"e in "#orage #em+era#re

122. With reference to the data logger for a refrigerate sys. Which of the parameters should be noted?

A. Sea wa#er #em+ +re""re

B. Con$en"er #em+

C. 5e%rigeran# !ea'age

D. )a+ora#or #em+.

123. >(i&( o% #(e %o!!owing %aor" a%%e +ene#ra#ion o% %e! $ro+!e#" $ring injeion/

A. Ja!i#, o% a#omia#ion

B. Injeion #em+era#re

C. S&aenge air +re""re

D. A!! o% #(e aboe.

124. be oi! +m+" #a'ing "ion %rom #(e "m+ o% mo"# "ma!! marine engine" are "a!!,

A. o% #(e $ia+(ragm #,+e

B. o% #(e &en#ri%ga! #,+e

C. +o"i#ie $i"+!a&emen# #,+e

D. in$e+en$en#!, $rien b, e!eri& mo#or"

12G. e!e"&o+i& +i+e" #o #(e +i"#on o% a !arge "!ow-"+ee$ main +ro+!"ion $ie"e! engine are $e"igne$ #o +reen#


35/123

A. e*&e""ie &ran'&a"e +re""re

B. e*&e""ie !be oi! #em+era#re

C. &on#amina#ion o% #(e !be oi! b, wa#er

D. &on#amina#ion o% #(e &oo!ing wa#er b, !be oi!

126. )*&e""ie a*ia! #(i&'ne"" o% a +i"#on ring &an !ea$ #o KKKKKKKKKKKKKKKKKKKK

A. S&ra+ing o%% o% oi! %rom !iner "r%a&e

B. In&rea"e$ wear

C. wi"#ing in #(e grooe

D. Di%%i&!#, in %orma#ion o% oi! we$ge

127. >(i&( o% #(e %o!!owing i" an ///a$(e"ie/// #,+e wear o% a &,!in$er !iner/

A. C!oer- !ea%ing

B. S&oring

C. S&%%ing

D. Oa!i#,

128. C,!in$er (ea$" o% marine $ie"e! engine" are +roi$e$ wi#( KKKKKKKKK #o re!iee an, e*&e""ie +re""re

wi#(in #(e &omb"#ion &(amber

A. Sa%e#, a!e"

B. In$i&a#or &o&'"

C. 5e!ie% a!e"

D. Br"#ing $i"&"


36/123

120. Woring of a pulse pressure turbocharger depends upon the 55555555555 that can be safely created

in the e)haust system.

A. )n#(a!+, $ro+

B. re""re $i%%eren&e

C. rbo&(arger r+m

D. re""re +!"e"

130. (e ma*imm e!onga#ion o% #iming &(ain" in "eri&e i" !imi#e$ #o KKKKKKKKKKK o% origina! &(ain !eng#(.

A. 2H

B. 1H

C. GH

D. 3H

131. D+!i&a#ion o% +ower ni#" %i##ing" an$ +i+ing" w(ere ea&( ni# i" &a+ab!e o% +roi$ing 100H "#eering

+ower an$ a#oma#i& i"o!a#ion o% one ni# in #(e een# o% a !ea'age@"ing!e %ai!re in #(a# ni# wo!$ &on"#i##e

100H re$n$an&, %or #(e "#eering gear ","#em. S&( ","#em i" man$a#or, on KKKKKKKKKKKK

A. A!! #an'er"

B. an'er" aboe 10000 ;

C. an'er" aboe 100000 Dw#

D. A!! "(i+" aboe

132. 5o#ine &!eaning o% air "i$e o% air &oo!er o% main engine i" $one b,:

A. Cir&!a#ing %re"( wa#er


37/123

B. Cir&!a#ing &o!$ &(emi&a! "o!#ion

C. Cir&!a#ing warm &(emi&a! "o!#ion

D. Cir&!a#ing (o# wa#er

133. >(a# +reen#" ro#a#ion an$ %re##ing be#ween a #(in "(e!! bearing an$ i#" (o"ing/

A. o&a#ion #ang" or +eg"

B. (e ni+ or &r"( o% #(e bearing

C. A "+e&ia! 'in$ o% a$(e"ie

D. An, o% #(e aboe

134. i&robia! $egra$a#ion o% main engine "m+ oi!" &an !ea$ #o:

A. In&rea"e$ &!ogging o% !be oi! %i!#er"

B. Corro"ie a##a&' on jorna!" an$ bearing"

C. orma#ion o% "#ab!e em!"ion"

D. A!! o% #(e aboe.

13G. In &a"e o% &on"#an# +re""re #rbo&(arging #(e e*(a"# o% #(e &,!in$er" goe" in#o :

A. Sma!! $iame#er e*(a"# +i+e" wi#( e*(a"# gro+ing

B. )*(a"# &om+en"a#or"

C. o!e"

D. arge $iame#er +i+e"

136. >(i&( o% #(e %o!!owing i" a !imi#ing %aor in &,!in$er !iner &oo!ing/


38/123

A. a*imm &omb"#ion #em+era#re

B. inimm !iner #em+era#re

C. )*(a"# #em+era#re

D. Dew +oin# %or %orma#ion o% "!%ri& a&i$

1",. Which of the follo!ing is not a conse:uence of over lubrication of a cylinder liner?

A. De+o"i#" in +i"#on #o+ !an$ w(i&( &an no# on!, &on"me !be oi! b# a!wa," !ea$ #o in&rea"e$ abra"ie

wear .B. S#i&'ing an$ jamming o% +i"#on ring" $e #o in&rea"e$ $e+o"i#".

C. Enbrn# !be oi! in "&aenge "+a&e" +o"ing in&rea"e$ ri"' o% "&aenge %ire .

D. In&rea"e$ &orro"ie wear

1"/. Bariable geometry turbocharging is the preferred choice over conventional turbochargers because '

A. ?C e%%i&ien&, i" er, (ig( a# (ig( engine !oa$"

B. ?C (a" goo$ "#ar#ing &(araeri"#i&" w(i!e e%%i&ien&, a# %!! !oa$" i" "!ig(#!, &om+romi"e$

C. ?C e%%i&ien&, i" o+#imie$ %or $i%%eren# engine !oa$" b, &(anging no!e ring geome#r,

D. ?C i" m&( &(ea+er an$ "im+!e #o man%are an$ i" ir#a!!, main#enan&e %ree

1"0.


39/123


40/123

B. eng#(ening o% e%%eie "#ro'e !ea$ing #o grea#er e*+an"ion in engine

C. oor #rbo&(arging e%%i&ien&,

D. Inabi!i#, o% #(e ","#em #o o+era#e a# !ow !oa$" an$ "!ow re"+on"e $ring a&&e!era#ion

1%%. Friction3 engine !ear3 and oil consumption in a diesel engine are directly related to the

A. a&i$i#, o% #(e oi!

B. +or +oin# o% #(e oi!

C. %!a"( +oin# o% #(e oi!

D. i"&o"i#, o% #(e oi!

1%(. +mproper maintenance of an automatic au)iliary boiler oil burner could result in

A. %e! +m+ %ai!re

B. %an mo#or %ai!re

C. in&rea"e$ %ee$wa#er &on"m+#ion

D. $e&rea"e$ boi!er e%%i&ien&,

1%*. &he effect of e)cessive tappet clearance is'

A. In&rea"e$ engine e%%i&ien&, a" e*+an"ion &an #a'e +!a&e %or a !onger $ra#ion an$ !e"" energ, wa"#e$ wi#( #(e

e*(a"# ga"e"

B. a!e (ammering &(ange in #iming o% e*(a"# wi#( more "i$e #(r"# &a"ing grea#er wear be#ween "#em an$

b"(

C. o"" in &om+re""ion +oor &omb"#ion im+ro+er mi*ing o% %e! air an$ ga" !ea'age $e #o im+ro+er

&!o"ing o% a!e


41/123

D. rbo&(arger "rging !o"" o% ro#a#ion o% a!e "+in$!e an$ (ig( e*(a"# #em+era#re"

1%,. &he difference bet!een rotocap and spinners for rotating e)haust valve spindle is that'

A. 5o#o&a+" ro#a#e #(e a!e" w(i!e &!o"ing w(i!e "+inner" ro#a#e #(em w(i!e o+ening

B. 5o#o&a+" ro#a#e #(e a!e" w(i!e o+ening w(i!e "+inner" ro#a#e #(em w(i!e &!o"ing

C. 5o#o&a+" ro#a#e #(e a!e" w(i!e o+ening w(i!e "+inner" ro#a#e #(e a!e %or #(e en#ire $ra#ion n#i! a!e i"

"ea#e$

D. S+inner" ro#a#e #(e a!e" w(i!e o+ening w(i!e ro#o&a+" ro#a#e #(e a!e %or #(e en#ire $ra#ion n#i! a!e i"

"ea#e$

1%/. Most fuel in>ection no99les are opened by

A. %e! oi! +re""re

B. a &am o+era#e$ %o!!ower

C. a "+ring-!oa$e$ +re""re +!a#e

D. #iming gear" 'e,e$ #o #(e &ran'"(a%#

1%0. Which of the follo!ing is a electro4 hydraulic type steering gear

A. 5o#ar, ane #,+e

B. 5am #,+e

C. Bo#( ro#ar, ane #,+e an$ ram #,+e

D. one o% #(e aboe

1(. Which of the follo!ing purposes is solved by a piston rod gland or stuffing bo) ?

A. o +roi$e an air "ea! be#ween "&aenge "+a&e an$ &ran'&a"e


42/123

B. o +reen# ingre"" o% &omb"#ion +ro$" n"e$ &,!in$er !be oi! $ebri" e#& in#o #(e &ran'&a"e

C. o +reen# &arr, oer o% "m+ oi! in#o #(e &ran'&a"e

D. A!! o% #(e aboe

1(1. Which of the follo!ing is a feature of $ul9er &ribo7ac pacage?

A. i$ !ee! !iner in"!a#ion

B. Dee+ (oning o% !iner

C. re- +ro%i!e$ an$ &oa#e$ +i"#on ring"

D. A!! o% #(e aboe

1(2. +n !hich of the follo!ing steering modes3 rudder !ill be loced at a particular angle until ne)t

manual order?

A. o!!ow +

B. A#o +i!o#

C. on o!!ow +

D. one o% #(e aboe

1G3. ai!re o% #(e brner %!ame in an a#oma#i& a*i!iar, boi!er wo!$ +robab!, be a re"!# o%

A. wa#er in #(e %e! oi!

B. bro'en (ig( #en"ion !ea$"

C. in&orre e!ero$e "e##ing

D. %!! %e! +re""re a# #(e no!e


43/123

1G4. A" +er reg!a#ion" #(e #ore &a+a&i#, o% a "#eering gear ","#em "(o!$ be "&( "o a" #o be ab!e #o #rn #(e

r$$erKKKKKKKKKKKKKKKKKKKKKKKKKK

A. 3G $egree" one "i$e #o 3G $egree" on #(e o#(er "i$e a# ma*imm "eri&e "+ee$

B. 3G $egree" one "i$e #o 30 $egree" on #(e o#(er "i$e a# ma*imm "eri&e "+ee$

C. 3G $egree" one "i$e #o 3G $egree" on #(e o#(er "i$e a# norma! "eri&e "+ee$

D. 3G $egree" one "i$e #o 30 $egree" on #(e o#(er "i$e a# norma! "eri&e "+ee$

1GG. (e o#+# +re""re o% a $ie"e! engine !be oi! +m+ i" reg!a#e$ b, a?an

A. re!ie% a!e

B. me#ering a!e

C. ariab!e "+ee$ +m+ $rie

D. ori%i&e in #(e !be oi! (ea$er

1(*. Most &8C have 44444444 flo! type of Compressor and 44444444flo! type of Rotor

a. Cen#ri%ga! 5a$ia! Im+e!!er a*ia!

b. Cen#ri%ga! a*ia! Im+e!!er ra$ia!

&. Cen#ri%ga! mi*e$ 5eaion 5a$ia!

$. 5o#ar, a*ia! 5eaion 5a$ia!

1G7. aor" o% !ower !imi# o% #(r"# b, &!earan&e

a. A$j"#men# o% &ran'"(a%#

b. o a!!ow #(r"# +a$" #o #i!# genera#e$ oi! we$ge


44/123


45/123

". With the help of e)planatory setches briefly state the lubrication system for a large 2 stroe slo!

speed marine diesel engine for the follo!ing.

@A &am"(a%# bearing"

@B main bearing"

@C +i"#on &ro""(ea$ bearing"

@D &,!in$er wa!!"

%. +f the valve tappets in a diesel engine are set at greater clearances than those specified by the engine

manufacturer3 those valves !ill 5555555555555.

@A o+en !a#e an$ &!o"e ear!,

@B o+en !a#e an$ &!o"e !a#e

@C %ai! #o o+en w(en #(e engine i" &o!$

@D %ai! #o o+en a# norma! o+era#ing #em+era#re

(. Regarding a Diesel engine crancase3 the general arrangement and installation should preclude the

possibility of 55555555.

@A %ree en#r, o% air #o #(e &ran'&a"e

@B wa#er en#ering #(e &ran'&a"e w(i!e engine wa"($own" are being +er%orme$

@C e*&e""ie oi! !ea'age $ring +erio$" o% in&rea"e$ b!owb,

@D "b&oo!ing in#erna! &om+onen#"

*. &he gro!th rate of microbiological organisms as found in some fuel supplies !ill 5555555555.

@A in&rea"e in $ire +ro+or#ion #o an in&rea"e in #em+era#re


46/123

@B $e&rea"e i% b!ea&(e" are a$$e$ #o #(e %e! on a reg!ar ba"i"

@C remain n&(ange$ +roi$e$ &om+!e#e &on"m+#ion o% #(e %e! o&&r" mon#(!,

@D A!! o% #(e aboe

,. Fuel in>ection pumps using the port and heli) metering principle re:uires the use of a 55555555555.

@A &ro""(a#&(e$ $e"ign

@B !a++e$ +!nger an$ barre!

@C ariab!e "#ro'e

@D ariab!e &am !i%#

/. +nternal combustion engine crancase vent outlets must be e:uipped !ith 555555.

@A (inge$ rain gar$"

@B &orro"ion re"i"#an# %!ame "&reen"

@C $i+"#i&'" %or mea"ring oi! !ee!"

@D &ran'&a"e en#i!a#ion %an"

0. 7roper lubrication of the main bearings is more easily obtained in a single acting four4stroe8cycle

diesel engine than in a single acting t!o4stroe8cycle diesel engine because 555555555555.

@A bearing +re""re in a %or-"#ro'e?&,&!e "ing!e aing $ie"e! engine i" &on#ina!!, reer"e$

@B bearing +re""re in a #wo-"#ro'e?&,&!e "ing!e aing $ie"e! engine i" &on#ina!!, reer"e$

@C #(e ma*imm bearing +re""re i" (ig(er in a "ing!e aing #wo-"#ro'e?&,&!e $ie"e! engine

@D #wo-"#ro'e?&,&!e $ie"e! engine" reire more &om+!i&a#e$ !bri&a#ion +i+ing

1. +ncreasing the valve clearance bet!een a valve stem and rocer arm3 !ill result in the valve

5555555555555.

@A &!o"ing !a#er

@B o+ening "ooner

@C "#a,ing o+en %or a "(or#er +erio$ o% #ime


47/123

@D "#a,ing o+en %or a !onger +erio$ o% #ime

11. What preventative maintenance should be done fre:uently to diesel engine starting air receivers?

@A Drain #(e a&&m!a#e$ moi"#re.

@B e"# #(e re!ie% a!e".

@C >a#&( #(e #em+era#re #o +reen# %!a#ion" in +re""re.

@D C!ean #(e in#erior #o remoe oi! an$ %oreign ma##er.

12. Friction developing bet!een the moving parts of a governor3 governor linage and control valve !ill

cause the governor to 555555555.

@A rea wi#( in"%%i&ien# "+ee$ $roo+

@B %ai! #o rea #o "ma!! "+ee$ &(ange"

@C (ae e*&e""ie "en"i#ii#, #o "ma!! "+ee$ &(ange"

@D remain in #(e ne#ra! +o"i#ion

1". &o minimi9e corrosion3 fuel oil strainer diss3 spacers and scraper blades are made of 5555555555555.

@A bra""

@B &o++er

@C iron

@D mone! me#a! or "#ain!e"" "#ee!

1%. +n a diesel engine3 ma)imum lube oil system pressure is normally controlled by 5555555555555.

@A #(e &a+a&i#, o% #(e !be oi! +m+

@B #(e "+ee$ o% #(e !be oi! +m+

@C #(e o#!e# +re""re o% #(e !be oi! +m+

@D a re!ie% a!e

1(. Which of the follo!ing statements describes the function of an e)pansion tan in a diesel engine

cooling system?

@A ain#ain" a &on"#an# (ea$ on #(e ","#em.

@B 5e$&e" #(e !i'e!i(oo$ o% air or "#eam +o&'e#" %orma#ion.


48/123

@C roi$e" a !ow +re""re +oin# %or #(e a$$i#ion o% ma'e+ &oo!ing wa#er.

@D A!! o% #(e aboe.

1*. Within the cycle of a forced circulation au)iliary !ater4tube boiler3 part of the !ater flashes into

steam3 and the remaining hot !ater is 55555555555555555.

@A &o!!ee$ in #(e !ower +or#ion o% #(e "#eam a&&m!a#or %or re&ir&!a#ion ba&' #o #(e (ea#ing &oi!

or wa#er #an'

@B re#rne$ #o #(e !ower $rm ia $own&omer" $e #o $en"i#, $i%%eren&e %or re(ea#ing

@C +a""e" #(rog( #(e $ome"#i& (ea#ing ","#em re#rn !ine "#eam #ra+" #o #(e a*i!iar, %ee$ "++!,

#an'

@D a#oma#i&a!!, $m+e$ in#o a*i!iar, %ee$ (ea#er an$ re(ea#e$ b, a*i!iar, e*(a"# ba&' +re""re

1,. +gnition failure in an automatically controlled au)iliary boiler could be caused by 5555555555555.

@A &arbon $e+o"i#" on #(e %!ame "&anner

@B (ig( %e! oi! #em+era#re

@C !ow %e! oi! i"&o"i#,

@D (ig( "#eam +re""re

1/. Which of the fuel in>ection systems listed uses a spring loaded differential spray needle valve and an

individual pump for each cylinder?

@A Common-rai! injeion

@B Air injeion

@C =er' +m+ injeion

@D Di"#rib#or injeion

10. &he interior of some diesel engine salt!ater heat e)changers are protected from corrosion by the use

of 5555555555.

@A a!minm +!a#e"

@B !ea$ &a#(o$e"

@C &o++er ba%%!e +!a#e"


49/123


50/123

2%. &he main re:uirements !hich a fuel in>ection system must fulfill are and state each one of the points

made above are true or false

@a a&&ra#e me#ering o% "ma!! amon# o% %e! oi!.

@b &on#ro! o% a!i#, o% %e! injeion

@& +ro+er #iming o% #(e %e! injeion

@$ "e!eie $i"#rib#ion o% #(e %e! in #(e &omb"#ion "+a&e.

. An" : A B C @5E) an$ D @AS)

2(. +n any marine diesel engine3 air movements inside a combustion chamber is very important.

enerally speaing3 air movement helps3 $tate !hich of the above points are true or false

@a #o $i"#rib#e #(e %e!

@b #o mi* i# wi#( air

@& #o &oo! #(e &,!in$er !iner

@$ #o (e!+ in o+#imi"ing !iner !bri&a#ion

@e #o a""i"# &omb"#ion

@% #o re$&e a%#er brning

@g #o re$&e &omb"#ion #em+era#re".

.

An" : A!! #re

2*. $acrificial 9inc anodes are used on the salt!ater side of diesel engine heat e)changers to

5555555555555.

@A re$&e e!ero!,#i& aion on (ea# e*&(anger me#a!"

@B 'ee+ (ea# #ran"%er "r%a&e" "(in, an$ &!ean

@C +reen# ra+i$ a&&m!a#ion o% marine grow#(

@D +roi$e a +ro#eie &oa#ing on (ea# e*&(anger "r%a&e"


51/123

2,. &he fuel supply system to an automatic au)iliary boiler3 !ill be automatically shutdo!n if the boiler

55555555555555.

@A "a!ini#, i" abnorma!!, (ig(

@B "#eam $eman$ i" #oo (ig(

@C wa#er !ee! i" abnorma!!, !ow

@D %ee$wa#er %!ow i" !ow

2/. &he crancases of many diesel engines are ept under a slight vacuum to 5555555555555.

@A im+roe %e! e&onom,

@B in&rea"e #(e air &(arge e!o&i#,

@C re$&e #(e ri"' o% e*+!o"ion

@D a!! o% #(e aboe

20. &he rate of cylinder lubricating oil metered to each cylinder of a large3 lo!4speed3 main propulsion

diesel engine is 55555555555555.

@A #(e "ame w(e#(er a# "ea or $ring maneering

@B a$j"#e$ $ring ea&( (or o% o+era#ion w(i!e a# &on"#an# 5

@C (ig(er a# "ea #(an w(i!e maneering

@D !ower a# "ea #(an w(i!e maneering

". n a medium4speed main propulsion diesel engine3 the cranpin or cran >ournal bearings receive

lubricating oil from 5555555555555.

@A a "+in$!e !bri&a#or

@B an oi! je#

@C in#erna! "+!a"(ing

@D $ri!!e$ +a""age" in #(e &ran'"(a%#

"1.


52/123


53/123

B. an in$e+en$en# !be oi! ","#em

C. #(e "#ern bearing (ea$ #an'

D. #(e "#ern bearing "m+ #an'

",. Which of the listed items should be secured before performing any maintenance on a solenoid

operated air start valve?

A. )!eri& +ower

B. be oi! "#an$b, +m+

C. ,$ra!i& "wi#&(

D. o#or $rain

"/. What is to be installed on an internal combustion engine if its cylinder bore e)ceeds 2mm?

A. Cran'&a"e a+or moni#or"

B. )ngine e*(a"# "i!en&er"

C. Con"#an# +re""re #,+e #rbo&(arger"

D. )*+!o"ion re!ie% a!e"

"0. Which of the follo!ing actions should normally be taen during each !atch !hen the au)iliary boiler

is in operation?

A. C!ean #(e %!ame "&anner +(o#o&e!! win$ow.

B. In"+e an$ &!ean a!! "o!enoi$ a!e".

C. i%# #(e "a%e#, a!e" b, (an$.

D. In"+e %or oi! or wa#er !ea'".

%. #)cessive vibration of an automatically fired au)iliary boiler can be caused by 5555555555555.

A. air or wa#er in #(e %rna&e

B. &omb"#ion +!"e"

C. %e! oi! +m+ %ai!re

D. %!ame %ai!re

%1. < dirty atomi9er sprayer plate in the burner of an au)iliary boiler3 !ould be indicated by


54/123

a. &arbon on #(e regi"#er $oor"

b. a $a!ing w(i#e a#omier %!ame

&. %!a#ing +re""re in #(e win$bo*

$. an neen!, "(a+e$ brner %!ame

%2. &he highest pressure in any closed diesel engine fresh!ater cooling system is at the 55

@a ja&'e# wa#er o#!e#

@b e*+an"ion #an' in!e#

@& (ea# e*&(anger in!e#

@$ &oo!ing wa#er +m+ o#!e#

%". Which of the follo!ing statements describes the function of an alarm annunciator on an engine room

alarm panel?

@a An a!arm &on$i#ion &a"e" a !ig(# an$ "iren #o &ome on w(i&( remain on n#i! #(e ma&(iner, i"

"e&re$.

@b A %!a"(ing !ig(# &ome" on %o!!owe$ b, an a$ib!e a!arm. >(en an a!arm a&'now!e$ge b##on i"

$e+re""e$ #(e a$ib!e a!arm i" "i!en&e$ an$ !ig(# "#a," on.

@& An a!arm &on$i#ion gie" an a$ib!e an$ i"a! a!arm "igna! bo#( o% w(i&( are "e&re$ w(en #(e

a!arm a&'now!e$ge b##on i" $e+re""e$.

@$ An a!arm &on$i#ion &a"e" a %!a"(ing !ig(# #o &ome on %o!!owe$ b, an a$ib!e a!arm. >(en #(e

a!arm a&'now!e$ge b##on i" $e+re""e$ #(e warning !ig(# i" e*#ingi"(e$.

%%. #)cessive leaage and premature failure of valve pacing is a result of 555555555555.

@a o+ening a a!e #oo i&'!,

@b jamming a a!e in #(e &!o"e$ +o"i#ion

@& !ow +re""re %!i$ %!ow #(rog( #(e +i+e!ine

@$ a "&ore$ a!e "#em

%(. &he purpose of a temperature sensing device installed in the stac of a small automatically fired

au)iliary steam boiler is to secure the oil burner 555555555555555.


55/123

A. in #(e een# o% a %!ame %ai!re

B. in #(e een# o% a "#a&' %ire

C. w(en #(e wa#er !ee! rea&(e" #(e &rown "(ee#

D. w(en #(e %ee$ +m+ $i"&(arge +re""re $ro+" #o a +re"e# minimm

%*. I% the combustion control system of an automatically fired au)iliary boiler fails to restart from the

normal shutdo!n mode3 you should chec for KKKKKKKKKKKKKK.

@A bro'en or gron$e$ (ig( #en"ion !ea$"

@B a %a!#, igni#ion &ab!e &onneor

@C an in&orre e!ero$e "e##ing

@D a!! o% #(e aboe

%,. >hen taing tan soundings on a ship3 coating the tape !ith chal helps to 5555 KKKKKKKKKK.

@A be##er i$en#i%, #(e &orre rea$ing

@B "(ow #(e $e+#( o% an, wa#er in an oi! #an'

@C ma'e #(e #a+e ro!! ea"ier

@D re$&e +o""ibi!i#, o% "+ar'"

%/. When a !aste heat boiler is installed in the e)haust of a main propulsion diesel engine3 the e)haust gas

bypass !ould be used 555555555555.

@a a# (ig( !oa$" #o +reen# oer(ea#ing

@b a# !ow !oa$" #o +reen# &orro"ion in #(e boi!er

@& $ring +erio$" o% (ig( "#eam $eman$

@$ w(en #(e #rbo&(arger i" in o+era#ion

%0. +t is desirable for an au)iliary boiler safety valve to pop open and reseat :uicly to 5555555555.

@a gie warning #(a# e*&e""ie boi!er +re""re (a" been rea&(e$

@b +reen# wire $rawing o% #(e $i"& an$ "ea#


56/123

@& +reen# a!e +on$ing

@$ +roi$e "%%i&ien# b!ow$own

(. Which of the follo!ing statements is correct regarding grades of pipe?

@a S#ain!e"" "#ee! +i+e i" man%are$ in %or genera! gra$e".

@b Bra"" +i+e i" man%are$ in #(ree &ommon gra$e".

@& Co++er +i+e i" man%are$ in #wo &ommon gra$e".

@$ (e #erm Le*#ra "#rongL i" norma!!, a""o&ia#e$ wi#( "&(e$!e 160 "#ee! +i+e

(1. &he crancase of many diesel engines are ept under a slight vacuum by the 55555555555555.

@A "&aenging aion o% #(e +i"#on

@B +i"#on #,+e a&m +m+ #a'ing "ion o%% a $i%%eren#ia! manome#er

@C g!an$ e*(a"#ing manome#er

@D &ran'&a"e e*(a"# %an

(2. Aubricating oil systems for diesel engine >ournal bearings are usually lubricated by !hich of the

follo!ing types of lubricating oil systems?

@A S+!a"(

@B ;rai#,

@C re""re

@D B,+a""

(". Which of the follo!ing conditions can cause above normal air temperature to develop in the intae

manifold of a four4stroe8cycle3 turbocharged3 diesel engine?

@A C!ogge$ air in#a'e %i!#er"

@B i"#on b!ow-b,

@C A $e%eie a%#er&oo!er

@D a!#, e*(a"# a!e"

(%. When may the crancase ventilation pipes or oil drain pipes of t!o or more engines be connected?


57/123

@A ro+!"ion engine" n$er 1000 "(a%# (or"e+ower ma, "(are a &ommon &ran'&a"e en# +roi$e$

#(e oi! $rain" remain "e+ara#e.

@B In mo"# &a"e" i# i" $e"irab!e an$ &o"# e%%eie %or +ro+!"ion engine" #o "(are a &ommon

&ran'&a"e en#i!a#ion an$ moni#oring ","#em.

@C o in#er&onneion ma, be ma$e be#ween #(e &ran'&a"e en#i!a#ion +i+e" or oi! $rain +i+e"

@D one o% #(e aboe are &orre.

((. Which of the follo!ing statements describes the uncheced gro!th of microbiological organisms

!ithin a fuel system?

@A (e $,ing baeria wi!! &a"e a &oa#ing #o be %orme$ on #(e "i$e" o% #(e #an' #(ereb, $e&rea"ing

&orro"ion.

@B (e %e! in #(e #an' wi!! !oo"e i#" %!i$i#, "o!i$i%, an$ be #(e &a"e o% an e*+en"ie

remoa! +ro&e"".

@C Corro"ion o% ario" me#a! &om+onen#" wi!! o&&r $e #o #(e %orma#ion o% (,$rogen "!%i$e ga".

@D A!! o% #(e aboe are &orre.

(*. +f the feed pump for an au)iliary boiler fails to deliver the feed !ater to the boiler3 the cause may be

@A (ig( "#eam +re""re in #(e boi!er

@B abnorma!!, (ig( %ee$wa#er #em+era#re

@C abnorma!!, (ig( boi!er wa#er #em+era#re

@D "#eam $eman$ e*&ee$ing %ee$ +m+ &a+a&i#,

(,. When lighting off an au)iliary boiler3 !hich of the problems listed could cause the burners to sputter?

@A Co!$ %e! oi!

@B ow %e! oi! +re""re

@C ow a#omiing "#eam +re""re

@D >a#er in #(e %e! oi!

(/. Which of the follo!ing actions taes place in the control circuit of an automatically fired au)iliary

boiler !hen the desired steam pressure is obtained?


58/123

@a A #em+era#re "en"ing $ei&e o+en" #(e &ir&i# brea'er in #(e brner mo#or.

@b (e (ig( !imi# &on#ro! "e&re" +ower #o #(e en#ire oi! %iring ","#em.

@& (e "#a&' re!a, aa#e" #(e !ow !imi# &on#ro! w(i&( brea'" #(e igni#ion &ir&i#.

@$ (e "#a&' re!a, "e&re" +ower #o #(e (ig( o!#age "i$e o% #(e igni#ion #ran"%ormer.

(0. e!e"&o+i& +i+e" #o #(e +i"#on o% a !arge "!ow-"+ee$ main +ro+!"ion $ie"e! engine are $e"igne$ #o +reen#

KKKKKKKKKK.

@a e*&e""ie &ran'&a"e +re""re

@b e*&e""ie !be oi! #em+era#re

@& &on#amina#ion o% #(e !be oi! b, wa#er

@$ &on#amina#ion o% #(e &oo!ing wa#er b, !be oi!

*. Sb#raing #(e re#rn %!ow me#er rea$ing %rom #(e "++!, %!ow me#er rea$ing on a boi!er ei++e$ wi#( a

re#rn %!ow %e! oi! ","#em $e#ermine" #(e amon# o% oi! KKKKKKKKKKKK.

@A &ir&!a#e$ b, #(e ","#em

@B brner #(rog(+#

@C re#rne$ #o #(e "e##!er

@D $i"&(arge$ %rom #(e +m+

$#C&+@ "

6


59/123

2. +n >er type large fuel in>ection pumps3 pulsations are absorbed by'

A. (e %e! +m+ re"i!ien# %on$a#ion

B. (e (ig( +re""re +i+e"

C. (e "(o&' ab"orber" mon#e$ on %e! +m+"

D. (e "(o&' ab"orber" mon#e$ on (ig( +re""re +i+e"

". Which of the follo!ing can be a possible outcome of salt !ater contamination in fuel?

A. Cai#a#ion an$ ero"ion o% %e! injeion &om+onen#".

B. ig( #em+era#re &orro"ion in e*(a"# a!e" an$ #rbo&(arger"

C. En"#ab!e &omb"#ion

D. A!! o% #(e aboe

%. &he !ater in a steaming au)iliary boiler should be tested daily for

A. $i""o!e$ o*,gen

B. &(!ori$e"

C. "!$ge

D. $i""o!e$ ni#rogen

(. What fittings do you normally find in a main engine turbocharger prior to compressor inlet in the

air flo! path ?

A. re-%i!#er an$ $i%%"er

B. re-%i!#er "i!en&er an$ $i%%"er

C. re-%i!#er "i!en&er an$ in$&er

D. re-%i!#er "i!en&er ibra#ion $am+er

*. nit of inematic viscosity

A. &en#i+oi"e"

B. &en#i"#o'e"


60/123

C. CCAI

D. none o% aboe

,. #)haust valve seat material

A. "#ain!e"" "#ee!

B. inar

C. nimoni&

D. in&ome

/. Drop in compres sion pressure !ith high scavange bo) temp in a cylinder

A. !a#e injeion

B. ear!, injeion

C. worn +i"#on ring

D. !ea', e*( a!e

0. Which of the follo!ing statements is true?

A. (e (ig(er #(e i"&o"i#, in$e* o% a !bri&an# #(e (ig(er i" #(e &(ange o% i"&o"i#, wi#( #em+era#re.

B. (e (ig(er #(e i"&o"i#, in$e* o% a !bri&an# #(e !ower i" #(e &(ange o% i"&o"i#, wi#( #em+era#re.

C. i"&o"i#, in$e* i" no# a mea"re o% a %!i$" &(ange in i"&o"i#, wi#( #em+era#re.

D. one o% #(e aboe

1. +n case of cross scavenged engines '

A. (e e*(a"# +or#" are !o&a#e$ aboe #(e "&aenge +or#" an$ #(e, o+en eer,#ime #(e +i"#on rea&(e"

near DC an$ near BDC

B. (e e*(a"# +or#" are !o&a#e$ be!ow #(e "&aenge +or#" an$ #(e, o+en eer,#ime #(e +i"#on rea&(e"


61/123

near DC an$ near BDC

C. (e e*(a"# +or#" are !o&a#e$ aboe #(e "&aenge +or#" an$ #(e, o+en eer,#ime #(e +i"#on rea&(e"

near BDC

D. (e e*(a"# +or#" are !o&a#e$ be!ow #(e "&aenge +or#" an$ #(e, o+en eer,#ime #(e +i"#on rea&(e"

near BDC

11. While overhauling a piston rod stuffing bo)3 if the butt clearance of scraper rings is found belo!

or near the minimum3 the correct remedial measure !ould be KKKKKK

A. o %i!e #(e en$" o% #(e ring" an$ in&rea"e #(e &!earan&e

B. o renew #(e ring "e# or %i# new !ame!!ae

C. o "wa+ #(e !ower ring" wi#( #(e ++er ring"

D. o renew a "egmen# or #wo o% ring "e# #o ob#ain #(e $e"ire$ &!earan&e

12. +n a electro4 hydraulic steering gear3 the movement of actuator is created by KKKKKKKKKKK

A. S#ar#ing #(e mo#or" on bo#( +ower ni#"

B. O+era#ing #(e i"o!a#ing a!e"

C. S#ar#ing a# !ea"# one +ower ni# an$ aa#ing #(e $ireion a!e"

D. S#ar#ing bo#( +ower ni#" an$ aa#ing #(e $ireion a!e"

$#C&+@ %

1; Friction developing bet!een the moving parts of a governor3 governor linage and control valve !ill

cause the governor to

a 5ea wi#( in"%%i&ien# "+ee$ $roo+

b ai! #o rea #o "ma!! "+ee$ &(ange"

& ae e*&e""ie "en"i#ii#, #o "ma!! "+ee$ &(ange"


62/123

$ 5emain in #(e ne#ra! +o"i#ion

2; < large change in ambient temperature3 or using an oil of a viscosity different than the one

recommended by the manufacturer in a mechanical hydraulic governor3 !ill result in the need to ad>ust

the

a+i!o# a!e o+ening

b &om+en"a#ing nee$!e a!e

&&om+en"a#ing "+ring #en"ion

$a&&m!a#or "+ring #en"ion

"; Friction3 engine !ear3 and oil consumption in a diesel engine are directly related to the

A a&i$i#, o% #(e oi!

b or +oin# o% #(e oi!

& !a"( +oin# o% #(e oi!

D i"&o"i#, o% #(e oi!

%; When the prime movers of t!o paralleled generators3 e:uipped !ith mechanical4hydraulic governors3

are operating !ithin their designed range3 the unit !ith the least amount of speed drop !ill G

a +i&' + more o% an, in&rea"e in !oa$

b+i&' + !e"" o% an, in&rea"e in !oa$

&"(are an ea! amon# o% an, in&rea"e in !oa$

$$ro+ an ea! amon# o% an, $e&rea"e in !oa$

(; Clearance volume scavenging in a turbocharged3 four4stroe8cycle diesel engine is accomplished

a $ring #(e a!e oer!a+ +erio$

bwi#( on!, #(e e*(a"# a!e o+en

&a# a +re""re be!ow a#mo"+(eri&

$wi#(o# &oo!ing #(e &,!in$er" or +i"#on"

*; &run4type diesel engine pistons are most effectively cooled by heat


63/123

a&on$e$ #(rog( #(e engine b!o&'

b&on$e$ #o wa#er &oo!e$ &,!in$er wa!!"

&&on$e$ #(rog( #(e +i"#on &rown

$!o""e" #o e"&a+ing e*(a"# ga""e"

,; Fuel oil is in>ected into the cylinder of a four4stroe8cycle diesel engine during the

ain#a'e "#ro'e

be*(a"# "#ro'e

&+ower "#ro'e

$&om+re""ion "#ro'e

/; < large3 lo!4speed3 main propulsion diesel engine uses sea !ater to directly cool the

a&,!in$er (ea$"

be*(a"# a!e"

&"&aenging air

$injeor"

0; &he total starting air capacity re:uired for reversible main engines is to be sufficient for a least

a"i* &on"e&#ie "#ar#"

beig(# &on"e&#ie "#ar#"

&#en &on"e&#ie "#ar#"

$#we!e &on"e&#ie "#ar#"

1; &he light and medium fuels utili9ed in internal combustion engines provide a source of

a!bri&a#ion %or +i"#on" an$ ring"

b%oo$ %or mi&robio!ogi&a! organi"m"

&ga"e" mo"# $e#rimen#a! #o #(e oone !a,er o% #(e a#mo"+(ere

$a!! o% #(e aboe

11; Which bearing half !ill receive the greatest load in a t!o4stroe8cycle diesel engine?

aower (a!% o% #(e &onneing ro$ bearing a# #(e &ran'"(a%# en$ o% #(e ro$


64/123

bE++er (a!% o% #(e main bearing

&ower (a!% o% #(e +i"#on +in bearing in #(e &onneing ro$

$A!! bearing (a!e" "(are an ea! !oa$

1"; < naturally aspirated diesel engine at full throttle !ill have an intae manifold pressure

a"!ig(#!, !e"" #(an a#mo"+(eri& +re""re

ba++ro*ima#e!, ea! #o e*(a"# mani%o!$ +re""re a# a!! #ime"

&#(a# i" wi$e!, %!a#ing

$&on"#anw#!, $e&rea"ing a" engine !oa$ in&rea"e"

1(;


65/123

&w(i!e n$erwa, an$ n$er a!! norma! &on$i#ion"

$a# 70 +er&en# o% #(e a(ea$ r+m o% aerage &on#ino" "ea "+ee$

2; Maintaining the lo!est possible scavenging air temperature at all times is not recommended due to

the possibility of the

aair &(arge $en"i#, be&oming #oo (ig(

b+i"#on &rown "r%a&e" be&oming #oo &o!$

&%orma#ion o% e*&e""ie an#i#ie" o% &on$en"a#e

$&om+re""ion +re""re being grea#!, re$&e$

21; &he nuts of main bearings3 connecting rod bolts and all other moving parts are to be secured by

a(ar$ene$ "#ee! n# !o&'"

b&o##er +in" ma$e o% "+ring "#ee!

&"+!i# +in" or o#(er e%%eie mean"

$(,$ra!i& n#" a" &ommon!, %on$ on !arge !ow "+ee$ engine"

2,; Which of the follo!ing condition may need to be reduced !hen operating a large3 lo!4speed3 main

propulsion3 diesel engine at lo! loads?4

aInjeion +re""re"

bCon#ro! air "++!, +re""re

&Coo!ing wa#er %!ow #(rog( a%#er &oo!er"

$be oi! #em+era#re

2/; ne function of the fuel pump delivery chec valve is to

a+reen# &arbon $e+o"i#" %rom %orming on #(e injeor no!e

b(e!+ #(e injeor nee$!e re"ea# wi#(o# $ribb!ing a# #(e no!e (o!e"

&+roi$e a +ro!onge$ +re""re $ro+ in #(e (ig( +re""re "#ee! +i+ing #o #(e injeor

$en"re a %e! !ea'o%% be#ween #(e +!nger an$ barre! w(i&( +roi$e" !bri&a#ion %or re!a#ie moemen#

20; < closed fresh!ater cooling system is commonly used !ith marine diesel engines because the G

anee$ %or wa#er #rea#men# i" e!imina#e$


66/123

b&oo!ing wa#er #em+era#re $i%%eren#ia! i" grea#er

&&oo!ing wa#er +m+" are $ire!, reer"ib!e

$ja&'e# wa#er #em+era#re i" more ea"i!, &on#ro!!e$

"; Fuel droplets in>ected into a diesel engine cylinder must have ade:uate penetration to

a+ro!ong #(e igni#ion $e!a, +erio$

ben"re #(e beginning o% %e! injeion

&#(orog(!, #i!ie #(e air &(arge

$a!!ow &on#ro!!e$ %e! &omb"#ion

"1; &he valve cam slope angle determines the G

aengine #ore &(araeri"#i&"

ba&&e!era#ion ra#e o% a!e o+ening an$ &!o"ing

&engine %e! e%%i&ien&,

$$iame#er o% in#a'e an$ e*(a"# a!e"

"2; &he rate of fuel in>ection in a diesel engine cylinder depends primarily on

a#(e "ie o% #(e (o!e" in #(e %e! no!e

b#iming o% #(e +m+

&"++!, +re""re #o #(e +m+

$"(a+e o% #(e &omb"#ion &(amber

""; Which of the follo!ing devices is normally provided to prevent oil starvation in a diesel lubrication

system utili9ing the Hfull flo!H principle?

aD+!e* "#rainer

b(ree-wa, a!e

&re""re re!ie% b,+a"" !ine aron$ #(e %i!#er

$e&(ani&a! "#raining %i!#er

"%; < port4and4heli) fuel in>ection pump having upper and lo!er plunger heli)es is designed to

aar, %e! $e!ier, an$ re#rn +re""re


67/123

bar, #(e beginning an$ en$ing o% injeion

&o+era#e wi#( re"i$a! %e!" on!,

$+roi$e ma*imm %e! $e!ier, ra#e

"(; ne advantage of hydraulic clutches over mechanical clutches in diesel engine installations is G

a#(e +ower i" #ran"mi##e$ a# er, (ig( e%%i&ien&, o% 60H

b#(e #or"iona! ibra#ion" are #ran"mi##e$ $ire!, #o #(e re$ion gear"

&ea&( &!#&( (a" a "e+ara#e oi! g!an$ %or reer"e o+era#ion

$no me&(ani&a! &onneion e*i"#" be#ween #(e $riing an$ $rien e!emen#"

"*; ection pump is designed for variable beginning and constant ending of in>ection.

For diesel engines operating at constant speeds3 the start of in>ection !ill

aa$an&e a" #(e !oa$ in&rea"e"

bre#ar$ a" #(e !oa$ in&rea"e"

&remain n&(ange$ regar$!e"" o% !oa$

$a!wa," o&&r a# #o+ $ea$ &en#er

",; &he amount of fuel in>ected in a particular time3 or degree3 of cranshaft rotation is termed

ame#ering

b#iming

&ra#e o% injeion

$ra#e o% $i"#rib#ion

"/; +n a normally operating diesel engine3 the main source of lubricating oil contamination in the

crancase is a result of the G

a me#a! +ar#i&!e" !oo"ene$ b, wear

bair w(en no air &!eaner" are "e$

&&on$en"a#ion o% wa#er wa+or"

$brea'$own o% #(e !bri&a#ing oi! b, $i!#ion


68/123

"0; n small diesel engines3 a noticeable decrease in the time interval bet!een the replacement of the

lube filter cartridge indicates G

a+i"#on ring b!ow-b,

b$ir#, air %i!#er

&e*&e""ie oi! +re""re

$e*&e""ie oi! #em+era#re

%; When the lo!er edge of the spiral begins to uncover the release port in a >er pump3 the

a+m+ing &on#ine" n#i! #(e +!nger #rae!" i#" %!! "#ro'e

be%%eie +m+ing "#ro'e o% #(e +!nger en$"

&+re". $ro+" "!ow!, n#i! #(e %!! "#ro'e i" a##aine$

$+!nger ro#a#e" #o #(e ero $e!ier, +o"i#ion n#i! ne*# "#ro'e

%1; $ome diesel engines are fitted !ith a thermometer in the cooling !ater outlet from each cylinder. +f

the cooling !ater temperature from all cylinders begins to rise above normal3 you should suspect G

ain&rea"e$ b!ow-b, in a!! &,!in$er"

bin&om+!e#e &omb"#ion in a!! &,!in$er"

&oer!oa$ing in a!! &,!in$er"

$in"%%i&ien# %e! $e!ier, #o a!! &,!in$er"

%2; 7roper operation of the main engine reduction gear set re:uires the operator to monitor

a#(e "m+ oi! !ee!

boi! %!ow "ig(# g!a""e"

&bearing #em+era#re"

$a!! o% #(e aboe

%"; &he duration of fuel in>ection developed by an individual port4and4heli) fuel in>ection pump3 is

determined by the G

a#o#a! +m+ "#ro'e

b+m+ +!nger $iame#er


69/123

&+!nger (e!i* ang!e

$e%%eie +m+ "#ro'e

%%; =efore starting a diesel engine using an attached lube oil pump3 the engineer should

ao+en #(e b,+a"" !ine

b&# in #(e !be oi! &oo!er

&+re""rie #(e !be oi! ","#em

$#o+ o%% #(e e*+an"ion #an'

%(; < diesel engine using lube oil !ith too high a viscosity !ill e)hibit

ain&rea"e$ "#ar#ing $i%%i&!#, in &o!$ wea#(er

bin&rea"e$ oi! &on"m+#ion

&#(i&'ening a# (ig(er o+era#ing #em+era#re"

$minima! %riion !o""e"

%*; +f the main propulsion diesel engine governor !ors irregularly !ith a >ering motion3 a possible

cause can be4

aa "#i&'ing %e! &on#ro! !in'age

ba ma!%nioning oer!oa$ &am

&an n!o&'e$ oer"+ee$ #ri+

$%!oa#ing a!e"

%,; During e)tremely cold !eather3 !hile starting an engine3 it turns too slo!ly and fails to start. &his

problem is most liely the result of

A ig( %e! oi! i"&o"i#,

b ow %e! oi! #em+era#re

& ig( !be oi! i"&o"i#,

$ )nergie$ g!ow +!g"

%/; 7rolonged operation of a diesel engine !ith a closed cooling !ater system3 at lo!er than normal

designed temperatures can G


70/123

ain&rea"e +ower o#+#

b$e&rea"e !be oi! i"&o"i#,

&e!imina#e %e! 'no&'

$&a"e "!%ri& a&i$ %orma#ion

%0; Which of the listed governor characteristics !ill greatly affect the load sharing relationship bet!een

paralleled diesel generators?4

aSen"i#ii#,

bower

&S+ee$ $roo+

$Com+en"a#ion

(;


71/123

$ rb!en&e

(";. Which of the follo!ing statements best describes the operational characteristics of an isochronous

governors?4

a#(e, are "i#ab!e %or "e on main +ro+!"ion ni#"

b#(e, "#rie #o main#ain a &on"#an# engine "+ee$ %or a!! a!e" o% "#ea$, !oa$

&#(e, &a"e a +ro+or#iona! $ro+ in engine "+ee$ a" #(e !oa$ i" in&rea"e$

$#(e, (ae +oor "en"i#ii#, a# (ig( 5.

(%;. &heoretical perfect combustion in a diesel engine yields by4products of

aa!$e(,$e" an$ &arbon $io*i$e

bwa#er a+or an$ &arbon mono*i$e

&ni#rogen an$ &arbon mono*i$e

$wa#er a+or an$ &arbon $io*i$e

((; Combustion noc can occur in the cylinders of a diesel engine under any condition permitting4

aa "(or#ene$ igni#ion $e!a, +erio$

ba !ean %e!?air mi*#re

&e*&e"" %e! in #(e &omb"#ion &(amber

$ra+i$ a+ori"a#ion o% injee$ %e! $ro+!e#"

(*; When e)essive fuel dilution is noted in the lube oil3 the oil should be4

a&en#ri%ge$M

b%i!#ere$

&"#raine$

$&(ange$

(,; $ticing of diesel engine piston compression rings may be caused by4

a(ig( &om+re""ion +re""re

be*&e""ie ring aion

&e*&e""ie &,!in$er !bri&a#ion


72/123

$im+ro+er ring ro#a#ion

(/; When fuel is in>ected late into a diesel engine cylinder3

a#(e e*(a"# wi!! be &!ear

b%e! &on"m+#ion wi!! be !ow

&a!! #(e %e! wi!! be brne$ a# #o+ $ea$ &en#er

$%e! &on"m+#ion wi!! be (ig(

(0; M# A inlet temperature should beI

a40C

bG0C

&60C

$GGC

*; #)haust temp of one M# cylinder high could mean

a%e! a!e" nee$ oer(a!

be*( a!e !ea'age

&+i"#on ring b!ow +a"#

$a!! o% aboe

*1;For a 2 stroe engine !ith e)haust portsI

a"&aenge +or#" &!o"e be%ore e*(a"# +or#"

be*(a"# +or#" &!o"e be%ore "&aenge +or#"

&"&aenge +or#" an$ e*(a"# +or#" &!o"e a# "ame #ime be%ore BDC

$"&aenge +or#" an$ e*(a"# +or#" &!o"e a# "ame #ime a%#er BDC

*2;For a 2 stroe engine !ith e)haust valvesI

a S&aenge a!e &!o"e" be%ore e*(a"# +or#"

b )*(a"# a!e" &!o"e be%ore "&aenge a!e"

& S&aenge an$ e*(a"# a!e" &!o"e a# "ame #ime be%ore BDC

$ S&aenge an$ e*(a"# a!e" &!o"e a# "ame #ime a%#er BDC


73/123

*"; &he ma)imum amount of liner !ear occurs atI

a#o+ o% !iner

b1? 3 $ownwar$ %rom #o+ &en#re

&mi$wa,

$bo##om o% !iner

*%; Which of the follo!ing cannot be removed from fuel oil by centrifuging in the purifier and micro4

filtration

a"o$im

ba!minim an$ "i!i&on

&ana$im

$a"(

*(;+n the preheater before purifier the recommended heavy oil preheat is4

a8GC

b98C

&110C

$120&

**;For a M# !hich has a ( micron fuel filter3 a homogeni9er omega fire ; is usually fitted G

abe%ore #(e +ri%ier

ba%#er #(e +ri%ier

&a%#er #(e G mi&ron %i!#er #o )

$be%ore #(e (orion#a! &!ari%ier

*,;For a main engine fuel system !hich has a ( micron filter 3a super decanter is usually fittedI

abe%ore #(e +ri%ier

ba%#er #(e +ri%ier

&a%#er #(e G mi&ron %i!#er #o )

$be%ore #(e (orion#a! &!ari%ier


74/123

*/;For lo! sulphur "/ cst fuels the &=@ of M#CC oil should be in the region ofI

a20

b40

&60

$70

*0;sing a M#CC oil of high &=@ can causeI

aim+ro+er &en#ri%ging o% wa#er

bCa!&im !aer $e+o"i#" on bearing"

&"!$ge %orma#ion wi#( wa#er in ) "m+

$a!! o% aboe

,;When using a high &=@ M#CA oil and suddenly the ship has to use lo! sulphur "/ cst - in the

M#3 due to $#C< area entryI

are$&e #(e %ee$ o% )C

bin&rea"e #(e %ee$ o% )C

&$o no# &(ange #(e %ee$ ra#e

$in&rea"e #(e B o% #(e )C

,1;M# scavenge air temperature is ad>usted by4

a&on#ro!!ing #(e "ea wa#er in!e#

b&on#ro!!ing #(e "ea wa#er o#!e#

&'ee+ing o#!e# a!e 100H o+en a!wa,".

$none o% aboe

,2;&he M# >acet FW cooling outlet temperature is4

a80C

b9GC

&G0C

$GGC


75/123


76/123


77/123

&&am"(a%# an$ #(e engine b!o&'

$&ran'"(a%# an$ #(e engine b!o&'

/"; -eat e)changers are most commonly found in a small au)iliary diesel engine

a%e! oi! ","#em

bgoerning ","#em

&air "#ar#ing ","#em

$!be oi! ","#em

/%; Multiple concentric valve springs are often used !ith diesel engine valves to

aenab!e re"ear&( an$ $ee!o+men# o% &am &on#or #o be "im+!i%ie$

bo+era#e #(e a!e gear w(ere #(e !arger %or&e i" reire$ b# "+a&e !imi#a#ion" re"#ri "e o% a !arge

"+ring

&a!!ow %or ea"ier a!e re+!a&emen#

$enab!e a #o#a! "ma!!er a!e "+ring %or&e #o 'ee+ #(e a!e #ig(# on i#" "ea#

/(; Which of the listed bearing installations is sub>ected to s!inging motion?

a&ran'"(a%# jorna!

b&ran'+in bearing"

&wri"# +in bearing"

$#(r"# bearing"

/*; ne advantage of vacuum feed type cylinder lubricators over the li:uid sight type is4

a#(ere are %ewer moing +ar#"

ba$j"#men# i" no# reire$

&be##er me#ering a&&ra&,

$a !ower gra$e o% oi! ma, be "e$

/,; Cooling !ater pumps driven by direct reversing diesel engines are usually of the straight impeller

vane type 4pump !ith a concentric housing to

a+roi$e &oo!ing wa#er %!ow w(en #(e engine i" rnning ei#(er a(ea$ or a"#er


78/123

b+roi$e #(e grea#e"# +m+ e%%i&ien&,

&+reen# +m+ &!ogging %rom marine grow#(

$+reen# &ai#a#ion a# #(e +m+ o#!e#

//; Motor vessels usually have an independent lube oil system each for the main engine and main

reduction gears because

a&oo!er" are no# nee$e$ %or #(e gear ","#em

b&on#aminan#" +ro$&e$ b, #(e engine &o!$ (arm #(e re$ion gear"

&non a$$i#ie oi!" are "e$ in #(e main engine ","#em

$$i%%eren# #,+e &en#ri%ge" are reire$ %or #(e main engine an$ re$ion gear !be ","#em"

/0; Which of the bearings listed is most !idely used for main and connecting rod bearings of modern

diesel engines?

aS#ee!-!ine$

bore$ babbi## "e!%-a!igning

&S+!i# ro!!er

$re&i"ion in"er#

0; Directional intae ports in diesel engines are used to

are$&e air &(arge #rb!en&e

bin$&e air "wir!

&$e%!e (o# &omb"#ion ga" awa, %rom #(e a!e"

$o++o"e #(e e%%e" o% +i"#on in$&e$ "i"(

01; Diesel engine main and connecting rod precision bearings are made in halves. #ach half e)ceeds

one4half the bearing circumference by a small amount. &he small amount is termed

a&!earan&e

b&r"(

&+i#&(

$#(r"#


79/123

02; &he piston rod scraper bo) incorporated in a single acting t!o4stroe8cycle3 crosshead diesel engine

serves to

ae!imina#e #(e ne&e""i#, %or an oi! "&ra+er ring

b+reen# "i$e #(r"# an$ &,!in$er "&oring

&+reen# "!$ge an$ $ir#, oi! %rom en#ering #(e &ran'&a"e

$"&ra+e oi! an$ &arbon $e+o"i#" o%% #(e &,!in$er wa!!"

0"; &he proper location for >ournal bearing oil grooves is

ain #(e region o% #(e !oa$ bearing "r%a&e

ba" a "i$e re!ie% w(ere #(e #wo "(e!!" mee#

&a# #(e bo##om o% #(e bearing

$(a!%wa, be#ween bo##om an$ w(ere "(e!!" mee#

0%; -o! are hydraulic valve lash ad>usters on diesel engine rocer arm assemblies lubricated?

aC+-%e$ grea"e

bSea!e$ "e!%-!bri&a#or"

&e#ere$ (,$ra!i& oi! "++!,

$or&e$ !be oi! "++!,

0(; Main propulsion diesel engines having a bore e)ceeding " mm are to have at least

a#wo in$e+en$en# mean" o% "#ar#ing #(e engine

b%ie air "#ar#ing a!e" #o +ermi# #(e a$mi""ion o% "#ar#ing air a# an, &ran' ang!e

&one @e*+!o"ion re!ie% a!e a# #(e +o"i#ion o% ea&( main &ran' #(row

$#wo engine $rien !be oi! +m+" &a+ab!e o% +ara!!e! o+era#ion

0*; +ntegral !ater >acet liners use 4rings near the bottom of the liner3 these 4rings serve to

a%orm a wa#er "ea! be#ween #(e !iner an$ engine b!o&'

ba!!ow %or "!ig(# mi"a!ignmen# o% #(e !iner

&+reen# #(e e"&a+e o% !bri&a#ing oi! %rom #(e &ran'&a"e

$en"re +ro+er #em+era#re %!ow be#ween #(e !iner an$ engine b!o&'


80/123

0,; &elescopic pipes to the piston of a large slo!4speed main propulsion diesel engine are designed to

prevent

ae*&e""ie &ran'&a"e +re""re

be*&e""ie !be oi! #em+era#re

&&on#amina#ion o% #(e !be oi! b, wa#er

$&on#amina#ion o% #(e &oo!ing wa#er b, !be oi!

0/; < characteristic of a bearing material !hich permits small dirt particles to become embedded in the

surface Jis

a$e"irab!e a" i# wi!! +reen# $amage #o #(e jorna! "r%a&e

b$e"irab!e a" i# wi!! a""i"# in 'ee+ing #(e !be oi! %i!#er" &!ean

&n$e"irab!e "in&e #(e embe$$e$ +ar#i&!e" wi!! "&ore #(e jorna!

$n$e"irab!e "in&e #(e +ar#i&!e" wi!! in#er%ere wi#( !be oi! %!ow

00; Most fuel in>ection no99les are opened by

a%e! oi! +re""re

ba &am o+era#e$ %o!!ower

&a "+ring-!oa$e$ +re""re +!a#e

$#iming gear" 'e,e$ #o #(e &ran'"(a%#

1; Which of the follo!ing devices controls the discharge flo! rate of an attached3 positive

displacement3 rotary gear3 diesel engine3 lube oil pump?

aA +re""re reg!a#ing a!e

bA +re""re re!ie% a!e

&(e engine "+ee$

$An ori%i&e

11; &he e)pansion tan for a diesel engine closed cooling system is designed to maintain a constant

head on the system and

are$&e wa#er #em+era#re


81/123

bre$&e wa#er #rb!en&e

&+roi$e an air &"(ion

$a!!ow %or an in&rea"e in wa#er o!me a" #(e engine warm" +

12; &o minimi9e corrosion3 fuel oil strainer diss3 spacers and scraper blades are made of

abra""

b&o++er

&iron

$mone! me#a! or "#ain!e"" "#ee!

1"; Which of the follo!ing statements describes the function of an e)pansion tan in a diesel engine

cooling system?

aain#ain" a &on"#an# (ea$ on #(e ","#em

b5e$&e" #(e air &o&' w(en %ire" are !ig(#e$

&roi$e" a !ow +re""re +oin# %or #(e a$$i#ion o% ma'e+ &oo!ing wa#er

$A!! o% #(e aboe

1%; n a large diesel engine installation3 cranshaft a)ial alignment is maintained by the

a+i"#on ro$ gi$e"

bengine #(r"# bearing

&&ro""(ea$ bearing

$main "(a%# %!e*ib!e &o+!ing

1(; $cavenging in a four4stroe8cycle diesel engine occurs during the

a!a"# +ar# o% #(e e*(a"# "#ro'e an$ #(e %ir"# +ar# o% #(e in#a'e "#ro'e

b!a"# +ar# o% #(e in#a'e "#ro'e on!,

&ear!, +ar# o% #(e injeion "#ro'e on!,

$ear!, +ar# o% #(e +ower "#ro'e

1*; +n a large3 slo!4speed3 main propulsion diesel engine3 !hich of the parts listed is under tension

!hen the engine is running?


82/123

aBe$ +!a#e

bCo!mn

&)n#ab!a#re

$ie ro$

1,; &he lube oil cooler is located after the lube oil filter in order for

a#(e %i!#er #o o+era#e more e%%i&ien#!,

b#(e !be oi! &oo!er #o be b,+a""e$

&+o"i#ie !be oi! +m+ "ion #o be a""re$

$ga!ani& aion in #(e &oo!er #o be minimie$

1/; +n t!o4stroe8cycle diesel engine3 the process of scavenging begins as the

a+i"#on near" an$ +a""e" DC

bear!, +ar# o% #(e +"#ro'e

&+i"#on +a""e" BDC

$ear!, +ar# o% #(e $own"#ro'e

10 W res. to flo! of lubricating oil through a diesel engine3 the lube oil coolers are located after filters

in order to

aa!!ow %i!#ra#ion o% !e"" i"&o" oi!

b$e&rea"e #(e +re""re $ro+ a&ro"" #(e %i!#er

&im+roe oera!! %i!#ra#ion

$a!! o% #(e aboe

11; 7assages are drilled in the cranshafts of diesel engines to provide lubricating oil to the

amain bearing"

b&onneing ro$ bearing"

&+i"#on +in b"(ing"

$A!! o% #(e aboe

111; &he outlet from an e)pansion tan of a closed fresh!ater cooling system should be piped to the4


83/123

a&,!in$er (ea$ wa#er o#!e# (ea$er

b&,!in$er ja&'e# in!e# main

&(ea# e*&(anger in!e# &onneion

$ja&'e# wa#er +m+ "ion !ine

112; &he intae valves in diesel engine are reseated by

a&am %o!!ower"

b+"( ro$"

&&omb"#ion ga"e"

$a!e "+ring"

11"; $mall amounts of moisture are necessary to trigger the gro!th of microbiological organisms found

in some marine fuels. $ome sources of !ater contamination are

a#an' "r%a&e !ea'age

b(mi$i#, an$ &on$en"a#ion

&im+ro+er #an' wa"(ing +ro&e$re"

$A!! o% #(e aboe

11%; &he main function of tie rods in the construction of large3 lo! speed diesel engines is to

a"#i%%en #(e be$+!a#e in wa, o% #(e main bearing" #o in&rea"e #(e engineM" !ongi#$ina! "#reng#(

ba&&e+# mo"# o% #(e #en"i!e !oa$ing #(a# re"!#" %rom #(e %iring %or&e" $ee!o+e$ $ring o+era#ion

&mon# #(e engine %rame "e&re!, #o #(e (!! #o +reen# "(a%# &o+!ing mi"a!ignmen#

$&onne #(e &ro""(ea$ "o!i$!, #o #(e +i"#on ro$

11(; n most modern diesel engines3the main and connecting rod bearings receive their lubricating oil

by G

abanjo %ee$

b"+!a"( %ee$

&grai#, %ee$

$+re""re %ee$


84/123

11*; < unit type fuel in>ector is used on a diesel engine to

ame#er #(e %e!

b+ro$&e #(e +ro+er %e! oi! +re""re

&a#omie #(e %e!

$a!! o% #(e aboe

11,; Aubricating system for diesel engines are usually designed to initially provide lube oil to the engine4

a&am"(a%# bearing"

bmain bearing"

&+i"#on &rown"

$&,!in$er wa!!"

11/; Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps !hich

are4

ao+era#e$ mana!!, on&e ea&( (or

bo+era#e$ n#i! #(e engine (a" "#ar#e$

&+!a&e$ in#o o+era#ion on!, a# ma*imm !oa$

$a$j"#ab!e #o mee# !bri&a#ion reiremen#"

110; $hacer3 circulation3 and spray are the three general methods used in

a+re-injeion %e! oi! #rea#men#

b!be oi! %i!#ra#ion

&%e! oi! +ri%i&a#ion

$+i"#on &oo!ing

12; Fuel in>ector no99les are usually of the multi4orifice type !ith the number and placement of the

holes arranged according to the

a#,+e o% +i"#on ring"

b+re""re o% #(e %e! ","#em

&"ie o% #(e +m+ +!nger "+ring


85/123

$$e"ign o% #(e &omb"#ion &(amber

121; What is the cran angle bet!een any t!o cran thro!s in the firing order of a four4stroe8cycle3 in

line3 eight cylinder diesel engine?

a4GN b60N &90N $100N

122; &he main reason counter!eights are added to cranshafts is to

are$&e +i"#on "i$e #(r"#

bre$&e &ran'"(a%# en$ #(r"#

&+roi$e ni%orm !oa$ing an$ wear o% main bearing"

$in&rea"e #(e "#reng#( o% #(e &ran' web"

12"; < viscous damper3 as used on a marine diesel3 is a sealed precision built device !hich dampens the

torsional vibrations in the

a&am"(a%#

b%!,w(ee!

&&ran'"(a%#

$#(r"# "(a%#

12%; < cranshaft !hose center of gravity coincides !ith its center line is said to be

a$,nami&a!!, ba!an&e$

b"#a#i&a!!, ba!an&e$

&&on#er ba!an&e$

$re"onan#!, ba!an&e$

12(; &he possibility of damage from operating a diesel engine at critical speeds is reduced by the use of

aan i"o&(rono" goernor

be!a"#i& engine mon#"

&a ibra#ion $am+er

$a &a"# iron be

Motor Final m

Documents

Transcript of Motor Final m