单项选择题

（）is power supplied by main switchboard directly not through sub-board.

A.Deck machinery
B.Little power load
C.Some important load
D.stationary submersible pump

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单项选择题

（）are located on the road panel of main switchboard.

A.Megohm meter, insulation light and synchroscope
B.Synchroscope, synchro light and megohm meter
C.Shore power switch, insulation light and synchroscope
D.Megohm meter, insulation light and shore power switch

单项选择题

Insulation light is located on.（） of main switchboard.

A.Paralleling panel
B.Load panel
C.Emergency generator control pane
D.Main generator control pane

单项选择题

Synchrocope and synchro light are located on （） of main switchboard.

A.load panel
B.emergency generator control panel
C.battery changing and discharging panel
D.paralleling panel