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
3/3
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
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