单项选择题()are supplied by main switchboard directly.

A.Suez Canal searchlight, air compressor and air conditioning compressor
B.Air compressor, boiler blower and refrigeration plant
C.Boiler blower, Suez Canal searchlight and refrigeration plant
D.Suez canal searchlight, air compressor and boiler blower


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1.单项选择题After resolving the trouble of main power supply, main switch of emergency generator should(), if power supply is refreshed.

A.be switched off by the duty officer
B.be switched on by the duty officer
C.be switched off automatically
D.be switched on automatically

2.单项选择题Emergency generator is installed on board mainly to ()

A.connect to the busbar when the load increasing
B.supply power specially to charging panel
C.be put into operation during the ship arriving at or leaving port
D.ensure the power supply to critical equipment after the main switchboard out of power

3.单项选择题()is not installed on the emergency switchboard.

A.Ammeter
B.Voltmeter
C.Wattmeter
D.Synchroscope

4.单项选择题()belongs to emergency power supplying equipments.

A.argo winch
B.Windlass
C.Steering gear
D.Air compressor

5.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

6.单项选择题()belongs to emergency power supplying equipments.

A.Accommodation lighting
B.Windlass
C.Main sea water pump
D.Compressor

7.单项选择题()belongs to emergency power supplying equipments.

A.Navigation lamp
B.Windlass
C.Main sea water pump
D.Compressor

8.单项选择题()is not installed on the emergency switchboard.

A.Ammeter and changeover switch
B.Speed governor device
C.Synchroscope
D.Wattmeter

9.单项选择题()is not installed on the emergency switchboard.

A.Control panel
B.Paralleling panel
C.Load panel
D.Busbar

10.单项选择题()can be used to prevent hydraulic system overloaded or keep the pressure of oil outlet from pump constant.

A.Overflow valve
B.Reducing valve
C.Balancing valve
D.Reducing valve or balancing valve