A reference source for shipowners, ship officers, ship and engine draughtsmen, etc.
A reference source for shipowners, ship officers, ship and engine draughtsmen, etc.
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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 Operational Level SHIP CONSTRUCTION & STABILITY
IN+IA +IA (, (,* * N.B. -
CLASS IV (Ti! "##o$!% - 'or)* A/0! /0!r1oo1 1oo1 P"2! "2!r
at
To0"# M"r3)
(1) ll !uestions are co"pulsor# ($) ll !uestions carr# %&ual 'ars. () Neatness in hand*riting and clarit# in e+pression carries *eightage
1. A vessel vessel departed departed from point point "A" at at 1206 with with a counter counter reading reading of 616729 616729 and arrived arrived at point 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 -11.0+ .0+ Briefl /ustif our Answer 2. A continu continuous ous watertight watertight &ul(head &ul(head on a e essel ma also &e aan . . A. structu structural ral &ul(he &ul(head ad B. e4te e4teri rior or &ul( &ul(he head ad ,. cent center erlin linee &ul(h &ul(hea ead d . 5oin 5oiner er &ul( &ul(he head ad Briefl /ustif our Answer 3. egarding egarding e essel construction construction%% artitions in the living $uarters $uarters are generall .. A. 8truct 8tructura urall &ul(he &ul(heads ads B. wate watert rtig ight ht ,. non-str non-struct uctura urall &ul(h &ul(head eadss . contin continuou uouss &ul( &ul(hea heads ds Briefl /ustif our Answer . ertical ertical partitions providing providing strength and compartmentation compartmentation on a essel essel are called . . A. dec(s B. &ul( ul(head headss ,. 5oin 5oiner er wor( wor( . walls Briefl /ustif our Answer '. Bul(heads Bul(heads forming forming part of the tan(s on a e essel are stiffened stiffened to withstand withstand . . A. dec( dec( load loadss from from a&ove a&ove B. dnam dnamic ic forces forces while while aflo afloat at ,. hdro hdrosta static tic press pressur uree . overpr overpressu essuria riatio tion n Briefl /ustif our Answer
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 which direction* 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<=a> 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 2323m 2. 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<=a> its -corresponding speed% =&> a speed of 1' (not. 8(in frictional resistance f ? 0.7!6 8 1.!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(.
95SCS-4 Sr. No. 4 EXAMINATION OF MARINE ENGINEER OFFICER Function: Controlling Operation of ship and care for persons on board Operational Level SHIP CONSTRUCTION & STABILITY CLASS IV (Ti! "##o$!% - 'or)* A/0!r1oo1 P"2!r
IN+IA (,* N.B. -
at
To0"# M"r3)
(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 ? 3.9m Apparent 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.
