Why are chillers often used to cool large buildings?
a. Chillers use less refrigerant than other units.
b. Refrigerant piping is small because of low pressures.
c. Refrigerant piping is small because of high pressure.
d. Water piping is less expensive to install.
d
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All of the following are factors that influence heat loss except _____.
a. ambient temperature b. relative humidity c. insulation color d. insulation thickness
A bolt that requires a 1/2 inch wrench to rotate is usually what size when measured across the threads?
A) 3/8 inch B) 5/16 inch C) 1/2 inch D) 7/16 inch
To measure a circuit's source voltage, the voltmeter must ________
A) be placed in series in the circuit B) have the black lead towards the positive side of the source C) have the red lead towards the negative side of the source D) be placed across the source
The small line on a split system air-conditioning unit is the:
A) Discharge line. B) Oil return line. C) Liquid line. D) Suction line.