8/9/2019 Controlling Operation of Ship and Care for Persons on Board at Operational Level

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95SCS-4

Sr. No. 4

EXAMINATION OF MARINE ENGINEER OFFICER 

Function: Controlling Operation of ship and care for persons on board at 

Operational Level 

SHIP CONSTRUCTION & STABILITY

CLASS IV  (Ti! "##o$!% - 'or)*

IN+IA (,* A/0!r1oo1 P"2!r To0"# M"r3)

 N.B. - (1) ll !uestions are co"pulsor#

  ($) ll !uestions carr# %&ual 'ars.

  () Neatness in hand*riting and clarit# in e+pression carries *eightage

1. A vessel departed from point "A" at 1206 with a counter reading of 616729 and arrived at point "B"

with a counter reading of 731929 at 11! the following da. #his vessel is e$uipped with a 630cm

diameter propeller% with a pitch of 610cm. #he o&served distance of 0.16 nautical miles was

covered at an o&served speed of 16.!' (nots. )hat should &e the apparent slip for this trip*A. 1.0+

B. 1.29+

,. -6.6'+

. -11.0+

Briefl /ustif our Answer 

2. A continuous watertight &ul(head on a essel ma also &e aan .

A. structural &ul(head

B. e4terior &ul(head

,. centerline &ul(head

. 5oiner &ul(head

Briefl /ustif our Answer 

3. egarding essel construction% artitions in the living $uarters are generall .

A. 8tructural &ul(heads

B. watertight

,. non-structural &ul(heads

. continuous &ul(heads

Briefl /ustif our Answer 

. ertical partitions providing strength and compartmentation on a essel are called .A. dec(s

B. &ul(heads

,. 5oiner wor( 

. walls

Briefl /ustif our Answer 

'. Bul(heads forming part of the tan(s on a essel are stiffened to withstand .

A. dec( loads from a&ove

B. dnamic forces while afloat

,. hdrostatic pressure

. overpressuriationBriefl /ustif our Answer 

8/9/2019 Controlling Operation of Ship and Care for Persons on Board at Operational Level

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6. #he dec(s of a essel are supported & transverse mem&ers called .

A. trusses

B. dec( longitudinals

,. dec( &eams

. we& frames

Briefl /ustif our Answer 

7. :n a essel% the (eel is the primar strength mem&er of the lower hull form and is laid in whichdirection*

A. #ransverse

B. iagonal

,. ;ongitudinal

. ertical

Briefl /ustif our Answer 

!. A ship of 12%00 tonne displacement has a length of 12'm% 16.'m &eam and floats at a draught of 

7.'m. #he propeller has a face pitch ratio of 0.7'. )ith the propeller turning at 100 revmin the ship

travels at 12 (nots with a real slip of 30+. ,alculate apparent slip% =&> pitch of the propeller and =c> diameter of the propeller.#alor )a(e fraction )# ? 0.' , & @ 0.0'

9. #he wetted surface of a ship of 6%096 tonne displacement is 2323m2. ind the area of wetted surface

of a similar ship of 2032 tonne displacement. #he speed of the 6096 tonne ship was 1' (not.

,alculate the s(in frictional resistance of the 2032 tonne ship in ewtons at its -corresponding speed% =&> a speed of 1' (not.

8(in frictional resistance   f   ? 0.7!6 81.!3 ewton where 8 is the wetted surface and the speed

in (not. #he ships are assumed to &e in sea water.

10. A ship of '0!0 tonne displacement and CD ? 6.m is inclined in sea water & moving a mass of '.0

tonne transversel through a distance of 1.6m. #his caused a pendulum 6.lm long to &e deflected

10.2cm. uring the e4periment a dou&le &ottom tan(% 7.3m long ×  9.lm &road ×  1.22 m deep%

contained sea water to a depth of 0.61 m. ind the CE of the light ship if the onl deadweight was the

water in the tan(.

8/9/2019 Controlling Operation of Ship and Care for Persons on Board at Operational Level

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95SCS-4

Sr. No. 4

EXAMINATION OF MARINE ENGINEER OFFICER Function: Controlling Operation of ship and care for persons on board at 

Operational Level 

SHIP CONSTRUCTION & STABILITY

CLASS IV

  (Ti! "##o$!% - 'or)*

IN+IA (,* A/0!r1oo1 P"2!r To0"# M"r3)

 N.B. - (1) ll !uestions are co"pulsor#

  ($) ll !uestions carr# %&ual 'ars.

  () Neatness in hand*riting and clarit# in e+pression carries *eightage

 ns*ers

A1)$!r /or !)0io1 No. Corr!0 A1)$!r 6 C

A1)$!r /or !)0io1 No. , Corr!0 A1)$!r 6 A

A1)$!r /or !)0io1 No. Corr!0 A1)$!r 6 C

A1)$!r /or !)0io1 No. 4 Corr!0 A1)$!r 6 B

A1)$!r /or !)0io1 No. 5 Corr!0 A1)$!r 6 C

A1)$!r /or !)0io1 No. 7 Corr!0 A1)$!r 6 C

A1)$!r /or !)0io1 No. 8 Corr!0 A1)$!r 6 C

A1)$!r /or !)0io1 No.

itch of the propeller ? 3.9mApparent slip ? -6.2+

iameter of propeller ? .6'

A1)$!r /or !)0io1 No. 9

)etted surface Area ? 1119 m2

rictional resistance of 2032 tonne vessel ? '3'00

rictional resistance at speed of 1' (nots ? 7'00

A1)$!r /or !)0io1 No.

CE of light 8hip ? '.!'m