One common method for dealing with thermal expansion in a plumbing hot water system is to use a(n) _____.

a. water hammer arrestor
b. expansion loop
c. booster pump
d. trapeze hanger


b. expansion loop

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A movie shot at 30 frames per second shows a moving wagon having wheels that appear not to be rotating. The minimum rotational speed that produces this aliasing is ______ revolutions per second.

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

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Construction company personnel who handle materials that pose environmental hazards require additional training and a(n) _____.

a. medical surveillance program b. SWPPP permit c. CDL certification d. EPA ID number

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A fuel tank expansion chamber is designed to be what percentage of the tank capacity?

A) 10-20% B) 25-30% C) 2-5% D) None of these

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Which of the following statements best describes electronic timing relays?

A) Electronic timing relays are more repeatable than pneumatic timing relays. B) Electronic timing relays are more accurate than pneumatic timing relays. C) Electronic timing relays are more economical than pneumatic timing relays. D) All of the above

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