單項選擇題A flame screen().

A.permit the passage of vapor but not of flame
B.prevents the passage of flammable vapors
C.prevents inert gas from leaving a tank
D.permits vapors to exit but not enter a tank

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1.單項選擇題A foam-type portable fire extinguisher is most useful in fighting a fire in().

A.generators
B.oil drums
C.the bridge controls
D.combustible metals

2.單項選擇題A foam-type portable fire extinguisher would be most useful in combating a fire in().

A.soild materials such as wood or bales of fiber
B.flammable liquids
C.a piece of electrical equipment
D.combustible metallic solids

3.單項選擇題A galley grease fire on the stove may be extinguished using().

A.water
B.foam
C.the range hood extinguishing system
D.fire dampers

4.單項選擇題A gypsy or gypsyhead is a().

A.punt used for painting over the side
B.small, reciprocating steam engine
C.spool-shaped drum fitted on a winch
D.swinging derrick

5.單項選擇題A hydrostatic release mechanism for a liferaft().

A.must be wet before it will release
B.should be kept in a watertight except in an emergency
C.will inflate the raft in its cradle if operaterd manually
D.must be submerged to a certain depth to release automatically

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