Naval Architecture – MEO CLASS 4 WRITTEN PAPER

1. Pitch of propeller is defined as
   1. Forward movement of propeller when rotated by 360 degree
   2. Forward movement of propeller in un-yielding medium when rotated by 360 degree;
   3. Forward movement of propeller when rotated by 3600 when the vessel is floating in water
   4. Forward movement of propeller when rotated by 360 degree and in sea water;

ANS.: B

2. Which of the following pre-painting surface preparation methods is considered most efficient in case of hulls of modern day ships?
   1. Pickling
   2. Flame cleaning
   3. Blast Cleaning
   4. Wire brushing

ANS.: C

3. In- water survey in lieu of a one of the two docking surveys in a 5-year period may be accepted when:
   1. A suitable high resistance paint is applied to the ships underwater hull
   2. The ship is less than 15 years old
   3. The in-water survey provides all the information required by classification society
   4. A part of the ship is on fire

ANS.: A,C

4. Stability of a vessel is defined as:
   1. Vessel will come not back to its initial position when external disturbance is withdrawn;
   2. Vessel will come back to its initial position when external disturbance is withdrawn and by suitably shifting of weights;
   3. Vessel will float at different position when external disturbance is withdrawn;
   4. Vessel will come back to its initial position when external disturbance is withdrawn;

ANS.: B

5. Items no. 1 shown in figure above is
   
   1. Deck stringers
   2. Deck Transverses
   3. Deck Longitudinals
   4. Deck Girders

ANS.: C

6. Which of the following types of ships are assigned minimum freeboard?
   1. Container ships
   2. Bulk Carriers
   3. Ore carriers
   4. Oil Tankers

ANS.: D

7. A Suezmax vessel will have the following maximum limitations:

1. B=34 m, d=10 m
2. B=44 m, d=12 m
3. B=54 m, d=14m
4. B=64 m, d=16 m

ANS.: B

8. Peak tanks are tested by:
   1. Hose test
   2. By filling them with water up to load water line
   3. By filling them with water up to the maximum head which can come on them in practice or 2.44 m above tank crown, whichever is higher
   4. None of the above

ANS.: C

9. The primary purpose of fitting a bulbous bow is to:
   1. Improve the appearance of the ship.
   2. Strengthen the bow
   3. Improve propulsive efficiency
   4. Improve resistance to pounding

ANS.: C

10. In longitudinally framed double bottoms, the maximum spacing between solid floors should not exceed ______________ in any region.
    1. 2.5m
    2. 3.0m
    3. 3.7m
    4. 3.8m

ANS.: D

11. In transversely framed double bottoms, the maximum spacing between solid floors should not exceed ______________ in any region.
    1. 2.5m
    2. 3.0m
    3. 3.7m
    4. 3.8m

ANS.: B

13. A collision bulkhead must be fitted to all ships at _________________ of ship’s length abaft the stem at the load water line.
    1. 6 % to 9%
    2. 5 % to 9%
    3. 6%to 8%
    4. 5% to 8 %

ANS.: D

14. The cyclic angular motion of a ship about the ford-aft axis under the action of waves is known as:
    1. Pitching
    2. Yawing
    3. Rolling
    4. Heaving

ANS.: C

15. Why TPC is not constant for ship like structure along the draft?
    1. Length between the perpendiculars changes as draft changes.
    2. Area of the water plane varies along draft of ship.
    3. TPC remains constant for ship like structure.
    4. Draft of any floating structure does not influence the value of TP

ANS.: B

16. Air pipes in tanks are generally located:
    1. Near filling pipes
    2. Near pump suctions
    3. At the opposite end of filling pipes and/or the highest point in the tank
    4. At the lowest point in the tank

ANS.: C

17. Identify part no. 6 in the given figure:           
    1. Lower hopper tank
    2. Lower stool space
    3. Cofferdam
    4. Deep tank

ANS.: B

18. At the ends of the ships, to prevent making plates too narrow, pairs of adjacent strakes are made to run into one strake with the help of:
    1. Coffin plates
    2. Shoe plates
    3. Stealer plates
    4. Oxter plates

ANS.: C

19. Which of the following types of tanks can aid in improving the draught without considerably altering the trim?
    1. Double bottom tanks
    2. Top side tanks
    3. Deep tanks
    4. Peak tanks

ANS.:  B

20. Plates used to connect stern frames to flat plate keel are called:
    1. Shoe plates
    2. Coffin plates
    3. Stealer plates
    4. Boss plates

ANS.: B

21. Which of the following takes the weight of the rudder?
    1. The steering gear
    2. The rudder stock
    3. The rudder carrier bearing.
    4. The locking pintle

ANS.: C

22. Position of Centre of Buoyancy for box shaped barge
    1. Half of ship draught
    2. Depth of ship depth
    3. None of above
    4. All of above

ANS.: A

23. KG of ship increases with
    1. Adding weight above on present KG
    2. Ballasting DB tank
    3. Moving weight in transverse direction
    4. Moving weight in forward direction

ANS.: A

24. Block coefficient of crude oil carrier is between
    1. B/w 0.7-.75
    2. 0.75 to 0.85
    3. 0 .9-0.95
    4. 1-1.05

ANS.: C

25. _______ Transverse Watertight Cargo Hold Bulkhead____________ Type of Collision Bulkhead.
    1. Corrugated & Plate
    2. Swashed & Corrugated
    3. Swashed & plate
    4. Plate & Swashed

ANS.: A

26. In ship beam bracket are triangular plates joining the deck beam to_______
    1. bulkhead
    2. frame
    3. stanchion
    4. deck longitudinal

ANS.: B

27. The bleeder plug or docking plug located on a motor vessel double bottom tank is used to
    1. indicate when the tank is pressed up
    2. provide a secondary means of tank sounding
    3. Vent air from the tank when bunkering.
    4. empty the tank when in dry dock

ANS.: D

28. Vertical support member used to strengthen bulkheads are called
    1. stiffener
    2. panels
    3. brackets
    4. stanchions

ANS.: A

29. The welded joint located between two plates in the same strake of hull plating is called as
    1. Butt
    2. Lap
    3. Scarf
    4. Brackets

ANS.: A

30. Transverse frames are more widely spaced on a ship that is designed with the __________.
    1. Centerline system of framing
    2. Isometric system of framing
    3. Longitudinal system of framing
    4. Transverse system of framing

ANS.: C