On a properly operating system, what is the state of the refrigerant as it enters the compressor?

A. high pressure vapor
B. low pressure vapor
C. low pressure liquid
D. high pressure liquid


Answer: B

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_________________ resistors are designed such that resistance can be changed.

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

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Answer the following statement(s) true (T) or false (F)

1. The typical air handler is powered by a multispeed motor that can generally operate at two speeds. 2. The rapid cooldown of an evaporator coil results in increased moisture removal. 3. The factors that determine the amount of torque produced by the brushless DC motor are the same as those for any other electric motor. 4. Brushless DC motors can exhibit efficiency as high as 90%. 5. The brushless DC motor is controlled by a circuit board located in the air handler.

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For a carbon steel piping and flange system that is 6-inch schedule 40 with class 600 flanges operating at a max of 400°F, what is the MAWP?

a. 1200 b. 1205 c. 1270 d. 2062

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The underlying sketch shows two vertical full-length pressure plates and one small piece of pressure plate on the left-hand side of the vertical pressure plate. What is the purpose of the small-piece pressure plate?



What will be an ideal response?

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