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When there is course deviation, if the steering gear is at servo mode, we should give a reverse angle ( ) the ship tracks back to the course; and the reverse angle is given ( ).

A. after/automatically
B. during/automatically
C. during/manually
D. after/manually

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For a synchronous generator, if the power factor increases from 0.6 (lagging) to 0.8 (lagging), the exciting current should ( ) if we want to keep the terminal voltage constant.

A. increase
B. decrease
C. remain the same
D. depends on the AVR

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If the output active power and the terminal voltage of a single running synchronous generator keeps constant, for ① cosφ=1，cosφ=0.8(lagging)，③cosφ=0.8(leading), ( ) has the biggest reading of the exciting current meter and line current meter on the generator control panel.

A. ②/③、②
B. ③、②/③
C. ③/①
D. ③、②/②

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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

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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 there is course deviation, if the steering gear is at servo mode, we should give a reverse angle ( ) the ship tracks back to the course; and the reverse angle is given ( ).

A. after/automatically B. during/automatically C. during/manually D. after/manually

For a synchronous generator, if the power factor increases from 0.6 (lagging) to 0.8 (lagging), the exciting current should ( ) if we want to keep the terminal voltage constant.

If the output active power and the terminal voltage of a single running synchronous generator keeps constant, for ① cosφ=1，cosφ=0.8(lagging)，③cosφ=0.8(leading), ( ) has the biggest reading of the exciting current meter and line current meter on the generator control panel.

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.

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

A. after/automatically
B. during/automatically
C. during/manually
D. after/manually