單項(xiàng)選擇題

（）is main emergency fire system in all merchant ships.

A.CO₂ system
B.Foam system
C.Dry power system
D.Water supply system

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單項(xiàng)選擇題

Each fire drill shall not include（）.

A.Starting of a fire pump
B.Reporting to stations
C.Preparing for the duties described in the muster list
D.Checking of cargo handling equipment

單項(xiàng)選擇題

Which instrument is used to measure the relative humidity of air?（）

A.Hydrometer
B.Hygrometer
C.Spectrometer
D.Barometer