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

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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

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