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【单选题】

If a centrifugal bilge pump were continually operated with the discharge valve closed the ().

A、motor overload would open

B、relief valve would open

C、pump would eventually overheat

D、motor would overheat

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第2题

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第4题

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第6题

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第7题

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第8题

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第9题

A、motor controller overload would open  B、pump would eventually overheat  C、relief valve would continuously cycle open  D、motor would overheat  

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