單項(xiàng)選擇題As a vessel sinks to a depth of 15 feet，the hydrostatic trip releases the liferaft container from its cradle by（）.

A.breaking the weak link
B.releasing the tie-down strap
C.pulling the operating cord
D.releasing the CO2 canister


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1.單項(xiàng)選擇題A negative metacentric height（）.

A.will always cause a vessel to capsize
B.should always be immediately corrected
C.always results from off-center weights
D.All of the above are correct

2.單項(xiàng)選擇題In heavy seas the helmsman should steer the motor lifeboat（）.

A.into the seas
B.broadside to the seas
C.in the same direction as the seas
D.in a series of figure-eights

3.單項(xiàng)選擇題Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.

A.persons in the space wear gas masks
B.persons in the space wear damp cloths over their mouths and nostrils
C.ventilation system is secured and all persons leave the space
D.ventilation system is kept operating

4.單項(xiàng)選擇題In heavy seas you decide to heave to. The lifeboat should be（）.

A.brought to a position with the stern into the seas
B.allowed to take its own head
C.brought to lay in the trough
D.brought bow into the seas

5.單項(xiàng)選擇題Aboard a survival craft，ether can be used to（）.

A.start the engine in cold weather
B.aid in helping personnel breathe
C.prime the sprinkler system
D.prime the air supply

6.單項(xiàng)選擇題Oil fires are best extinguished by（）.

A.cutting off the supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water

7.單項(xiàng)選擇題A racetrack turn would be better than a Williamson turn in recovering a man overboard if（）.

A.the man has been missing for a period of time
B.the sea water is very cold and the man is visible
C.there is thick fog
D.the wind was from astern on the original course

8.單項(xiàng)選擇題Separation cloths may be used to（）.

A.absorb moisture from hygroscopic cargoes
B.fill gaps between layers of cargo
C.wrap cargo that leaks from packaging
D.keep bagged cargo leakage from contacting the deck

9.單項(xiàng)選擇題For a ship not on an international voyage，an approved substitute for an impulse projected rocket-type line throwing appliance is a（）.

A.spring loaded line thrower
B.hand thrown buoyant line
C.shoulder-type line throwing gun
D.heaving line

10.單項(xiàng)選擇題An obstruction on a helideck is any object that might present a hazard to the（）.

A.rotor blades and landing gear
B.unloading of passengers
C.loading of cargo
D.pilot's visibility