It takes many operations of the hand pump to lift the object a suitable distance. A ___________ valve allows flow in one direction only so that several operations of the handle might be combined to lift the load.

It takes many operations of the hand pump to lift the object a suitabl

1.	It takes many operations of the hand pump to lift the object a suitable distance. A ___________ valve allows flow in one direction only so that several operations of the handle might be combined to lift the load.
A.	Gate
B.	Needle
C.	Check
D.	Throttle
Answer» D. Throttle

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It takes many operations of the hand pump to lift the object a suitable distance. A ___________ valve allows flow in one direction only so that several operations of the handle might be combined to lift the load.

It takes many operations of the hand pump to lift the object a suitable distance. A ___________ valve allows flow in one direction only so that several operations of the handle might be combined to lift the load.

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