The closely spaced tees connecting a secondary circuit to the primary circuit are ____ when air is being purged from the system.

a. counterproductive
b. instrumental
c. essential
d. irrelevant


a. counterproductive

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a. Emergency branch b. Essential branch c. Life safety branch d. Critical branch

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_____ slows the cool-down rate following welding.? ?  

Fill in the blank(s) with the appropriate word(s).

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Which type of relief valve used on a turbocharged engine is noisy?

A) Bypass valve B) Dump valve C) Blow Off Valve (BOV) D) Both B and C

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