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
A(n) ____________________ is a hole that regulates and controls fluid pressure.
Fill in the blank(s) with the appropriate word(s).
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°
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