单项选择题

Signaling devices which are required on inflatable liferafts include（）.

A.a rocket shoulder rifle
B.an oil lantern
C.red flares
D.an air horn

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单项选择题

Signaling devices required on inflatable liferafts include a(n) （）.

A.Very pistol
B.orange smoke signal
C.air horn
D.lantern

单项选择题

Prior to entering a davit-launched liferaft，you should make sure that（）.

A.the liferaft is well ventilated of excess carbon dioxide
B.all personnel have removed their life preservers to facilitate boarding
C.the door flap has been cut away and stowed inside the raft
D.All of the above

单项选择题

Prior to boarding from a vessel，a davit-launched liferaft should be well ventilated of excess（）.

A.hydrocarbon gas
B.carbon monoxide gas
C.carbon dioxide gas
D.freon gas