单项选择题

（）is not a part of the main switchboard.

A.Busbar
B.Load panel of main generator
C.Paralleling panel
D.Shore connection box

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单项选择题

（）is not a part of the main switch board.

A.Control panel of main generator
B.Control panel of emergency generator
C.Paralleling panel
D.Load panel of main generator

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

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