單項(xiàng)選擇題To () , the power is supplied by main switchboard directly not though sub-board.

A.save network cost
B.improve the reliability of supplying power to important load
C.prevent sequence reverse
D.increase the power factor of important load


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1.單項(xiàng)選擇題()is not installed on the main switchboard.

A.Ammeter and changeover switch
B.Power factor meter
C.Synchroscope
D.Reverse sequence relay

2.單項(xiàng)選擇題()is used to control, modulate, monitor and protect generator set.

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

3.單項(xiàng)選擇題()is not a part of the main switchboard.

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

4.單項(xiàng)選擇題()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

5.單項(xiàng)選擇題()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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