Packing prevents fluid from leaking up around the valve _____.

a. body
b. stem
c. bonnet
d. bonnet bolting


b. stem

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Discuss the two methods used in manufacturing steel, giving their relative advantages and disadvantages.

What will be an ideal response?

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The neutral point is the common point on a ____ in a polyphase system.

A. bye-connection B. branch circuit C. wye-connection D. delta circuit

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Matter is defined as:

A) Anything that has mass and takes up space. B) Physical objects that emit energy. C) Anything that has weight, can be seen, and emits energy. D) Physical objects that can be seen.

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An air conditioning system should be pumped down (evacuated) for a minimum of ____ minutes.

A. 10 B. 20 C. 30 D. 60

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