题目内容

For a 40KVA,400V,50HZ,Y connection marine synchronous generator, if the reading of the power meter on the generator control panel is 16.6KW, the reading of the ampere meter is 60A, then the generator is running at ( ) status.

A. overload
B. full load
C. light load
D. over current

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For a 6-pole, 50 Hz marine diesel engine-generator sets, it nominal rotating speed is ( ).

A. 1000r/min
B. 960r/min
C. 500r/min
D. 480r/min

For low speed diesel engine-generator sets , the rotor is usually adopts ( ), due to its ( ) centrifugal force at high speed.

A. non-salient pole rotor/ large
B. non-salient pole rotor/ small
C. salient pole rotor/ large
D. salient pole rotor/ small

For a 3-phase induction motor working under nominal load condition, if the voltage of power source drops, the motor will ( ).

A. overload
B. underload
C. full load
D. remain the same

For a 6-pole 3-phase induction motor, its nominal slip SN=0.04, the its nominal rotating speed is ( ).

A. 200r/min
B. 380r/min
C. 540r/min
D. 960r/min

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