A high temperature differential (more than 2 degrees) between return air temperature at the grille and the return air temperature at the unit indicates:

A) Clogged liquid line. B) Dirty evaporator coil.
C) Return air leakage. D) Low refrigerant charge.


C

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Class ____ is a Service Grade hardboard and remains in the form in which it comes from a press but has less strength than Standard Class hardboard.

A. 1 B. 2 C. 3 D. 4

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Bees _____ with their antennas

a. Hear c. See b. Smell d. Taste

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

Any water used to make concrete should be clean and even drinkable.

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Which of the following can multimeters be used to measure?

A) Temperature, resistance, and distance B) Voltage, current, and resistance C) Voltage, temperature, and pressure D) Current, pressure, and temperature

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