Naval Architecture – MEO CLASS 4 WRITTEN PAPER

31. The purpose of bilge keels is to _____________.

1. lower the center of gravity of the ship
2. reduce the amplitude of roll
3. reduce pitching
4. reduce yawing

ANS.: B

32. With reference to a vessel’s structural integrity, the most significant characteristic of a cryogenic liquid is its ______________.

1. capability of causing brittle fractures
2. highly corrosive action on mild steel
3. vapor cloud which reacts violently with saltwater
4. toxicity at atmospheric pressure

ANS.: A

33. The hulls of most modern towing vessels constructed today are fabricated from _______________.

1. wrought iron
2. high alloy steel
3. mild steel
4. corrosion resisting steel

ANS.: C

34. An oceangoing ship of 350 gross tons, contracted for in January 1976, and not equipped with an oily water separator, all bilge slops may be retained __________ .

1. onboard in the ship’s bilges
2. in the forward peak tank
3. in the oil purifier reservoir
4. in a cofferdam

ANS.: A

35. When a vessel is floating upright, the distance from the keel to the metacenter is called the

1. metacentric differential
2. height of the baseline
3. height of the metacenter
4. righting arm

ANS.: C

36. Structural members used to support and transmit the downward force of the load and distribute that force over a large area, are called ______________.

1. pillars
2. stanchions
3. columns
4. all of the above

ANS.: D

37. When the propeller blades are integral with the hub, the propeller is called a _____________.

1. built up propeller
2. solid propeller
3. controllable pitch propeller
4. suction back propeller

ANS.: B

38. The process of grinding, shredding, or reducing the size of sewage particles is known as ________.

1. detension
2. maceration
3. bulking
4. chlorinating

ANS.: B

39. In ship construction, which of the listed strengthening members act to support the decks?

1. Pillars
2. Girders
3. Bulkheads
4. All of the above

ANS.: D

40. Vertical support members used to strengthen bulkheads are called _____________.

1. stiffeners
2. panels
3. stanchions
4. brackets

ANS.: A

40. The double bottom in a vessel is a space comprised of ______________.

1. plating forming the engine room tank top
2. doubler plating installed over the flat keel plate
3. a watertight boundary formed by the inner bottom
4. compartments between the inner and outer bottoms

ANS.: D

41. For a large passenger vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force ____________.

1. only when there is positive stability
2. only when there is negative stability
3. only when there is neutral stability
4. at all times

ANS.: D

42. A load line for a Dredger is assigned by the ______________.

1. Minerals Management Department (MMD)
2. Department of Energy (DOE)
3. Ministry of Defence
4. a recognized classification society approved by the Coast Guard
5. None of Above

ANS.: D

43. The vertical motion of a floating vessel is known as ____________.

1. surge
2. sway
3. heave
4. pitch

ANS.: C

44. When handling contaminated oil from a hermetically sealed refrigeration compressor unit that has burned out its motor, you should _____________

1. store the oil in a clean refrigerant drum
2. use rubber gloves
3. circulate the oil through a filter drier
4. remove the oil with a portable charging cylinder

ANS.: B

45. Adsorption filters are not commonly used in steam turbine or diesel engine lubricating systems because they ___________.

1. utilize exotic and expensive filtering media making them too costly for use.
2. are only effective at temperatures below 100øF
3. can adsorb no more than five times their weight in water
4. remove additives from the lube oil

ANS.: D

46. Main engine room control console alarms are to be of the self monitoring type, meaning that an open circuit to a particular alarm circuit will _____________.

1. cause an alarm condition
2. secure power to the indicator
3. secure power to the monitored device
4. automatically reclose within 10 seconds

ANS.: A

47. Which of the following is operated from the main engine room console on an automated vessel?

1. Fire pump and lube oil pump
2. Lube oil pump and distilling plant
3. Distilling plant and shaft alley door
4. Shaft alley door and fixed CO₂ release

ANS.: A

 48. On tankers using manually operated tank valves, the deck hand wheel indicator registers the ____________.

1. exact lift position of the tank valve disk, through 100% of its operation
2. oxygen content of the tank
3. approximate number of turns the tank valve has been opened
4. level of oil in the tank

ANS.: C

49. New piping and tubing to be installed in a hydraulic system can be safely degreased by using _________.

1. alcohol
2. a water-based detergent
3. carbon tetrachloride
4. a special petroleum solvent

ANS.: D

50. Potable water piping systems installed aboard ships must be _______.

1. disinfected monthly with a chlorine compound
2. independent of all other piping systems
3. cadmium lined to prevent internal corrosion
4. flushed each time potable water is taken onboard

ANS.: B