单项选择题
（）is not installed on the emergency switchboard.
A.Ammeter
B.Voltmeter
C.Wattmeter
D.Synchroscope
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单项选择题
（）belongs to emergency power supplying equipments.
A.argo winch
B.Windlass
C.Steering gear
D.Air compressor -
单项选择题
（）belongs to emergency power supplying equipments.
A.Emergency fire pump
B.Windlass
C.Main sea water pump
D.Fresh water pump -
单项选择题
（）belongs to emergency power supplying equipments.
A.Accommodation lighting
B.Windlass
C.Main sea water pump
D.Compressor
