The water line supplying a swimming pool requires the installation of a(n) _____.
a. pressure-type vacuum breaker
b. double-check valve assembly
c. atmospheric vacuum breaker
d. dual-check valve backflow preventer
a. pressure-type vacuum breaker
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What can be used to clean PV modules?
What will be an ideal response?
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The majority of stationary fuel cell systems made today are ____.
a. inexpensive systems b. self contained units c. low-technology systems d. prohibitively bulky
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Silk fibers are very fine, ranging from .01 to .14 inch in diameter
Indicate whether the statement is true or false
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High beams should be:
a. Used when it is safe and legal to do so. b. Turned on when an oncoming driver does not dim his/her lights. c. Adjust your speed to keep your stopping distance within your sight distance. d. All of the above.
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