题目内容

The no-load electromotive force in the armature winding of a synchronous generator is induced by ( ) .

A. main magnetic flux
B. Armature reaction magnetic flux
C. stator leakage flux
D. main flux and armature reaction flux together

查看答案
更多问题

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

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

答案查题题库