搜题

【单选题】

A centrifugal pump may fail to deliver water when first started if the （）.

A、water seal pipe is plugged

B、pump is not primed

C、seal ring is improperly located

D、impeller is flooded

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更多“A centrifugal pump may fail to deliver water when first started if the （）.”相关的问题

第1题

[单选题] On modern ships, centrifugm>am>l m>pumpm> with m>am> self-primer hm>am>s replm>am>ced reciprocm>am>ting m>pumpm> m>am>s bilge m>pumpm> becm>am>use（）

m>Am>、centrifugm>am>l m>pumpm> is chem>am>per thm>am>n reciprocm>am>ting m>pumpm> B、the size of centrifugm>am>l m>pumpm> with sm>am>me cm>am>pm>am>city is smm>am>ller thm>am>n thm>am>t of reciprocm>am>ting m>pumpm> C、centrifugm>am>l m>pumpm> mm>am>kes mm>am>intenm>am>nce em>am>sier thm>am>n reciprocm>am>ting m>pumpm> does D、m>am>ll of the m>am>bove

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第2题

[单选题] Which of the following m>pumpm>s belongs to centrifugm>am>l m>pumpm>?（）

m>Am>、Reciprocm>am>ting m>pumpm> B、Screw m>pumpm> C、Diffuser m>pumpm> D、Wm>am>ter-ring m>pumpm>

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第3题

[单选题] m>Am> deepwell m>pumpm> is m>am> type of（）.

m>Am>、screw m>pumpm> B、centrifugm>am>l m>pumpm> C、eductor D、gem>am>r m>pumpm>

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第4题

[单选题] m>Am> deepwell m>pumpm> is m>am> type of（）.

m>Am>、screw m>pumpm> B、centrifugm>am>l m>pumpm> C、eductor D、gem>am>r m>pumpm>

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第5题

[单选题] The lube oil m>pumpm> used in m>am> diesel engine is m>am> （）.

m>Am>、volute m>pumpm> B、centrifugm>am>l m>pumpm> C、dim>am>phrm>am>gm m>pumpm> D、gem>am>r m>pumpm>

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第6题

[单选题] m>Am> vm>am>ne m>pumpm> belongs to （） m>am>ccording to its working principle.

m>Am>、reciprocm>am>ting m>pumpm> B、positive displm>am>cement m>pumpm> C、centrifugm>am>l m>pumpm> D、centripetm>am>l m>pumpm>

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第7题

[单选题] m>Am> gem>am>r m>pumpm> belongs to （） m>am>ccording to its working principle.

m>Am>、reciprocm>am>ting m>pumpm>s B、positive displm>am>cement m>pumpm>s C、centrifugm>am>l m>pumpm>s D、centripetm>am>l m>pumpm>s

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第8题

[单选题] m>Am> screw m>pumpm> belongs to （） m>am>ccording to its working principle.

m>Am>、reciprocm>am>ting m>pumpm>s B、positive displm>am>cement m>pumpm>s C、centrifugm>am>l m>pumpm>s D、centripetm>am>l m>pumpm>s

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第9题

[单选题] m>Am> reciprocm>am>ting m>pumpm> belongs to （） m>am>ccording to its working principle.

m>Am>、injector m>pumpm>s B、positive displm>am>cement m>pumpm>s C、centrifugm>am>l m>pumpm> D、centripetm>am>l m>pumpm>s

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第10题

[] Which of the following m>pumpm>s belongs to centrifugm>am>l m>pumpm>?（）

m>Am>、m>Am>.Piston m>pumpm> B、B.Screw m>pumpm> C、C.Diffuser m>pumpm> D、D.Wm>am>ter-ring m>pumpm>

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