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单选题The instantaneous reduction in voltage of an AC generator, resulting from an increase in load, and prior to the automatic voltage regulator correcting the situation, is called voltage （）.A droopB dropC dipD regulation

题目
单选题
The instantaneous reduction in voltage of an AC generator, resulting from an increase in load, and prior to the automatic voltage regulator correcting the situation, is called voltage （）.
A

droop

B

drop

C

dip

D

regulation

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相似问题和答案

第1题：

Overspeed of the diesel engine driving an electric generator could cause ______.

A.low voltage trip

B.reverse power trip

C.damage to windings

D.excessive exhaust temperatures


正确答案：C
柴油机超速驱动一发电机可能引起对卷损坏。

第2题：

The frequency of an AC generator is controlled by the

A.rheostat

B.governor

C.exciter

D.capacitor


正确答案：B

第3题：

( ) can provide an asynchronous link between two ac electric power system with different nominal frequencies.

A.The HVDC (high voltage DC) transmission

B.The EHV (extra-high voltage) AC transmission

C.The AC distribution

D.Generators


参考答案：A

第4题：

单选题
Which of the listed items will stop a motor due to a reduction in voltage and restart it when the voltage is restored to normal?（）
A

Low voltage protection circuit

B

Non-renewable link fuse

C

Renewable link fuse

D

Low voltage release circuit


正确答案： A
解析： 暂无解析

第5题：

单选题
The purpose of DC generator brushes is to （）.
A

neutralize armature reaction

B

conduct electric current to an outside circuit

C

convert DC current to AC current

D

provide excitation to a DC generator


正确答案： D
解析： 暂无解析

第6题：

The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the

A.prime mover speed

B.exciter output voltage

C.load on the alternator

D.number of poles


正确答案：B

第7题：

The frequency of an AC generator is controlled by the ___.

A.rheostat

B.governor

C.exciter

D.capacitor


正确答案：B

第8题：

The generator voltages are usually stepped up to the transmission voltage level by ( ).

A.series capacitor

B.parallel reactors

C.step-up transformers

D.step-down transformers


参考答案：C

第9题：

单选题
A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an （）
A

rotor

B

stator

C

exciter

D

armature


正确答案： C
解析： 暂无解析

第10题：

单选题
The voltage output of an AC generator is controlled by（）
A

varying the DC exciter voltage

B

varying the reluctance of the air gap

C

regulating the speed of the prime mover

D

shorting out part of the armature windings


正确答案： D
解析： 暂无解析

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