题目内容

In order to keep the voltage of the synchronous generator constant under any load, the excitation current must be adjusted according to ( ) of the synchronous generator.

A. no-load characteristics
B. output characteristics
C. regulation characteristics
D. speed regulation characteristics

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For a synchronous generator, armature reaction doesn’t exist when ( ).

A. supply power to pure resistive load only
B. supply power to pure capacitive load only
C. supply power to pure inductive load only
D. after fault trip

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When the 3-phase synchronous generator is working under no-load, the armature current is ( ).

A. close to 0
B. at biggest value
C. changing with voltage
D. can be adjusted arbitrarily

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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

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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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In order to keep the voltage of the synchronous generator constant under any load, the excitation current must be adjusted according to ( ) of the synchronous generator.

A. no-load characteristics B. output characteristics C. regulation characteristics D. speed regulation characteristics

For a synchronous generator, armature reaction doesn’t exist when ( ).

When the 3-phase synchronous generator is working under no-load, the armature current is ( ).

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

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. no-load characteristics
B. output characteristics
C. regulation characteristics
D. speed regulation characteristics