What is the primary purpose of the low-pressure control in a heat pump?

a. Cycles compressor off on low loads
b. Prevents refrigerant floodback
c. Protects against loss of charge.
d. Prevents outdoor


c. Protects against loss of charge.

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Where in a system is a PTC start thermistor installed?

a. In series with the start capacitor b. Parallel with the run capacitor c. Parallel with the start capacitor d. In series with the common terminal

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A 5 ribbed serpentine belt should be tensioned at about ________

A) 45 to 60 lbs. B) 150 lbs. C) 75 to 100 lbs. D) None of these

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The wire sizes used in welded-wire fabric reinforcement are designated by _____

a. AWG wire gauge b. cross-sectional area in hundredths of a square inch c. cross-sectional area in hundredths of a square centimeter d. diameter in thousandths of an inch

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Gaskets are used to _____.

A. lubricate ball bearings B. retain lubricants or seal a chamber C. buffer moving components D. support axial and radial loads

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