A.respiratory irritant
B.skin burning agent
C.blood poisoning agent
D.nerve paralyzing irritant
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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
A.stomach
B.lower intestines
C.inner ear
D.bladder
A.keep the propeller from being fouled
B.increase propeller speed
C.help calm the waves in the vicinity of the craft
D.increase the holding power of the sea anchor
A.immediately reverse the engines
B.stop the propellers from turning and throw a ring buoy over the side
C.increase speed to full to get the vessel away from the person
D.first put the rudder hard over in either direction
A.the other services are run off a reducing station with a pressure gage
B.a separate fire pump is available for use on the fire main
C.all other services are operated by a manifold near the pump
D.All of the above
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A negative metacentric height（）.
If you must land on a beach with an oar-propelled lifeboat through a heavy surf，the recommended method is to（）.
Multiple fire pumps may be used for other purposes provided that one pump is（）.
Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.
For a ship not on an international voyage，an approved substitute for an impulse projected rocket-type line throwing appliance is a（）.
A right-handed propeller will cause the survival craft to（）.
Inflatable liferafts are less maneuverable than lifeboats due to their（）.
If the coxswain of your lifeboat gives the command HOLD WATER you should（）.
If you have to jump in the water when abandoning a vessel，your legs should be（）.
On a ship，a fire pump may be used for other purposes if（）.