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【单项选择题】

Any electric motor can be constructed to be（）.

A、A.short proof

B、B.ground proof

C、C.explosion proof

D、D.overload proof

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更多“Any electric motor can be constructed to be（）.”相关的问题
第1题
[] What type of electric motor is most commonly used on board ship?（）

A、A.non-synchronous electric motor  B、B.synchronous electric motor  C、C.fully enclosed electric motor  D、D.watertight electric motor  

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第2题
[单选题] 操作完后，关掉电动机。（）

A、After operation, start the electric motor.  B、Before operation, stop the electric motor.  C、Before operation, start the electric motor.  D、After operation, stop the electric motor.  

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第3题
[单选题] Any electric motor can be constructed to be（）.

A、short proof  B、ground proof  C、explosion proof  D、overload proof  

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第4题
[单选题] Which of the following electric motors would be the safest and most reliable to use on the main deck of a vessel in foul weather conditions?（）

A、Sealed motors  B、Drip proof motors  C、Enclosed motors  D、Watertight motors  

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第5题
[单选题] Which of the following electric motors would be the safest and most reliable to use on the main deck of a vessel in foul weather conditions?（）

A、Sealed motors  B、Drip proof motors  C、Enclosed motors  D、Watertight motors  

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第6题
[单选题] “A centrifuge consists of an electric motor driving a vertical shaft on the top of which is mounted the bowl assembly”.According to this sentence, we can know that is mounted on the top of the vertical shaft（）

A、a centrifuge  B、an electric motor  C、a bowl assembly  D、a driving motor  

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第7题
[单选题] Universal motors will operate on AC or DC current, and are generally found in （）

A、portable tools  B、large pump motors  C、turbo electric main motors  D、forced draft fans  

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第8题
[单选题] A hydraulic motor may be driven by （）.

A、an electric motor  B、a diesel engine  C、a compressor  D、oil  

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第9题
[单选题] Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）

A、higher speed required  B、flywheel-effect  C、lower starting temperatures  D、higher compression pressures  

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