Electricity is available to the consumer in two different forms: ____ and ____.

a. direct current (DC) and alternating current (AC)
b. direct current (DC) and complete current (CC)
c. alternating current (AC) and atomic current (ATC)
d. directional current (DC) and alternative current (AC)


a. direct current (DC) and alternating current (AC)

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The minimum compressor horsepower is nearest:

The ideal vapor refrigeration cycle utilizes R134a between saturation temperatures of ?20°C and 40°C. It has a flow
rate of 0.6 kg/s.

A) 10.1 hp
B) 11.8 hp
C) 13.3 hp
D) 15.2 hp

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The two types of bearings used in the heating, cooling, and refrigeration industry are ____________________ bearings and sleeve bearings.

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

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

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When cutting brass, thick wall pipe, angle-iron, or copper, use a hacksaw blade that has ____ teeth per inch.

A. 14 B. 18 C. 24 D. 32

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