题目内容

The arc extinguishing grid of the automatic air circuit breaker is made of ( ).

A. insulation material
B. iron grid
C. ceramic material
D. hard rubber

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Generally speaking, there is a ( ) control between main generator sets and emergency generator sets to prevent them running in parallel.

A. interlock
B. mutual lock
C. self lock
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A. steering gear
B. temporary emergency lighting equipment
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D. emergency fire fighting pump

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( ) is an emergency equipment.

A. Cabine ventilator
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During the shore power connection operation, the shore power switch trip off as soon as it is switched on, the possible reason can be ( ).

A. the marine power station is in operation
B. the phase sequence is not the same with the ship’s power grid or phase loss
C. reverse power relay acts
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The arc extinguishing grid of the automatic air circuit breaker is made of ( ).

A. insulation material B. iron grid C. ceramic material D. hard rubber

Generally speaking, there is a ( ) control between main generator sets and emergency generator sets to prevent them running in parallel.

The temporary emergency power source supply the electrical power to ( ).

( ) is an emergency equipment.

During the shore power connection operation, the shore power switch trip off as soon as it is switched on, the possible reason can be ( ).

A. insulation material
B. iron grid
C. ceramic material
D. hard rubber