Naval Architecture – MEO CLASS 4 WRITTEN PAPER

 SECTION – 4

1. Position of center of buoyancy of a box shaped barge is at
   1. Half of the draught;
   2. Half of the depth of the hull
   3. All of the above
   4. None of the above

ANS.: A

2. Which of the following statements is False?

1. A collision bulkhead must be fitted on all types of ships.
2. An after peak bulkhead must be fitted on all types of ships.
3. One bulkhead at each end of machinery spaces must be fitted on all types of ships.
4. The aft peak bulkhead must extend to the upper deck

ANS.: D

3. Shedder plates are sometimes provided between, the corrugated bulkheads and lower stool shelf plates. The purpose of shedder plates is to:
   1. Provide strength to the shelf plate
   2. Reduce the unsupported span of corrugated bulkhead
   3. Prevent piling up of dry cargo on horizontal portions of lower stool shelf plates
   4. Reduce stress concentration at the connections of corrugated bulkheads to the lower stool shelf plates

ANS.: C

4. If the cause of severe list or trim is due to off center ballast, counter flooding into empty tanks will______________
   1. increase the righting moment
   2. increase the righting arm
   3. increase list or trim
   4. decrease list or trim

ANS.: D

5. Stability after the unintentional flooding of a compartment on a cargo vessel is called.
   1. intact stability
   2. initial stability
   3. immersion stability
   4. damage stability

ANS.: D

6. Keel scantlings of any vessel are greatest amidships because __________.
   1. connections between forebody and afterbody are most crucial
   2. of maximum longitudinal bending moments
   3. of severest racking stresses
   4. resistance to grounding is at a maximum amidships

ANS.: B

7. A thirty pound plate would be __________.
   1. 3/8″ thick
   2. 1/2″ thick
   3. 3/4″ thick
   4. 1″ thick

ANS.: C

8. The ceiling is __________.
   1. the overhead in berthing compartments
   2. a wooden protection placed over the tank top
   3. material driven into seams or cracks to prevent leaking
   4. None of the above are correct

ANS.: B

9. The wooden planking that protects the tank top from cargo loading is called__________.
   1. ceiling
   2. shores
   3. frames
   4. toms

ANS.: A

10. A set of interior steps on a ship leading up to a deck from below is known as______.
    1. a companion way
    2. tween-decks
    3. stairs
    4. All of the above are acceptable

ANS.: A

11. Hull-Model relation is based on:
    1. Reynolds numbers of both Hull and Model are equal.
    2. Froude numbers of both Hull and Model are equal.
    3. Reynolds and Froude numbers of both Hull and Model are equal.
    4. None of the above

ANS.: B

12. Which statement about the free surface correction is TRUE?
    1. It is added to the uncorrected GM to arrive at the corrected available GM.
    2. It is obtained by dividing the free surface moments by 12 times the volume of displacement.
    3. It is obtained by dividing the total free surface by the total vertical moments.
    4. It is subtracted from the total longitudinal moments before dividing by displacement to find LCG.

ANS.: B

13. In order to calculate the TPI of a vessel, for any given draft, it is necessary to divide the area of the waterplane by __________.
    1. 35.0-r
    2. 120.0
    3. 240.0
    4. 420.0

ANS.: D

14. Wake is defined as
    1. w= (PN- V_S)/V_S ;
    2. w= (PN- V_a)/PN;
    3. w= (PN- V_S)/PN;
    4. w= (PN- V_a)/V_a ;

ANS.: B