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


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1.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

2.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

3.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

4.單項選擇題A hygrometer is a device used for determining().

A.the absolute temperature
B.atmospheric pressure
C.wind velocity
D.relative humidity

5.單項選擇題A large oil fire on the deck of a ship can be fought most effectively with().

A.dry chemical
B.foam
C.high-velocity fog
D.water