A purge unit ____.

A. helps to provide subcooling in the condenser
B. helps to provide superheat in the suction line
C. relieves non-condensable gases from the system to the atmosphere
D. provides capacity control


Answer: C

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Electronic duty switch contacts are designed to switch high currents and pilot duty contacts are more suited for switching very small current levels

Indicate whether the statement is true or false

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When used in a dehumidification application, the purpose of a heat pipe heat exchanger includes _____

a. removing sensible heat from the air supply b. precooling the air entering the evaporator c. preheating the air entering the evaporator d. providing emergency heat if the compressor fails

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What units are used to measure pressure in HVACR systems?

What will be an ideal response?

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Where on the enthalpy diagram is refrigerant saturated?

A) Everything to the right of the saturated line of demarcation B) Everywhere on the chart is saturated because the enthalpy diagram is specifically for saturated refrigerant C) On and Inside the saturation curve D) There are no areas of saturation because the enthalpy chart is for gases.

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