Identify the following components:


Fan

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Dual-check valve backflow preventer assemblies are difficult for plumbers to remove, test, or replace because they _____.

a. have left-hand threaded connections b. do not have replaceable valve inserts c. are installed in very tight spaces d. are not normally fitted with shutoff valves or test cocks

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A(n) ____________________ is a hole that regulates and controls fluid pressure.

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

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More than one evaporator coil circuit is used when ____.

A. the evaporator is located outside the conditioned area B. there would be excessive refrigerant pressure drop in the coil circuit C. a distributor would not be practical D. a slant coil is at an angle more than 60°

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What is the function of a quick release valve when used in a front service brake circuit?

A. speeds up application time B. speeds up release time C. intensifies service pressure D. all of the above

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