A.ExhibitingB.ExistingC.DemonstratingD.DisplayingECDIS ……

单项选择题（）is main emergency fire system in all merchant ships.

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

单项选择题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

单项选择题Which instrument is used to measure the relative humidity of air?（）

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

单项选择题（）is normally responsible for maintaining records of corrections to navigational charts and nautical publications.

A.The chief officer
B.The second officer
C.The third officer
D.The PSC officer

单项选择题The company should establish procedures by which（）receive relevant information on the safety management system in working language or language understood by them.

A.New personnel
B.The ship's personnel
C.Personnel transferred to new assignments
D.Visitor