Gear pumps are （） type because they discharge a near constant amount of liquid regardless of pressure.

A、positive displacement

B、non-positive displacement

C、mixed-flow

D、axial-flow

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更多“Gear pumps are （） type because they discharge a near constant amount of liquid regardless of pressure.”相关的问题

第1题

[] Positive displacement, helical gear pumps are well suited for pumping oil because （）

A、A.stuffing boxes eliminate the leakage problems usually associated with other gear pumps B、B.it is not necessary to closely maintain design clearances with this pump C、C.they are essentially self-priming and produce a high suction lift D、D.these pumps are designed with extreme tooth angled

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第2题

[单选题] The gear and screw pumps are classified as （）.

A、variable stroke pumps B、multistage pumps C、positive displacement pumps D、triple-ported pumps

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第3题

[单选题] （） are more suitable for large quantities at low pressure.

A、Reciprocating pumps B、Rotary pumps C、Centrifugal pumps D、Gear pumps

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第4题

[单选题] The gear, screw, and vane pumps are all classified as （）.

A、variable stroke pumps B、multistage pumps C、positive displacement pumps D、triple-ported pumps

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第5题

[] Which of the following pumps are self-priming, and can deal with liquid from a level below the pump: （） (1)reciprocating (2)vane (3)gear Which of the following pumps are self-priming, and can deal with liquid from a level below the pump: （） (1)reciprocating (2)vane (3)gear

A、A.（1）only B、B.（1）and（2） C、C.（2）and（3） D、D.（1），（2）and（3）

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第6题

[单选题] An advantage of a helical gear pump over a simple gear pump is that the helical gear pump is capable of （）.

A、maintaining a steadier speed B、delivering liquids over greater distances C、operating for longer periods of time D、producing a smoother discharge flow

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第7题

[单选题] Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid （） pressure.

A、depending on B、in relative to C、regardless of D、because of

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第8题

[单选题] A deepwell pump is a type of（）.

A、screw pump B、centrifugal pump C、eductor D、gear pump

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第9题

[单选题] A deepwell pump is a type of（）.

A、screw pump B、centrifugal pump C、eductor D、gear pump