Package or self-contained all-weather units are not normally made for electric air conditioning and ____.
A. natural gas heat
B. electric heat
C. LP gas heat
D. oil heat
Answer: D
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An R-22 refrigeration system requires a superheat of 8°F. If the evaporator saturation pressure is 43 psig, what should the bulb temperature be?
A) 35°F B) 51°F C) 28°F D) 8°F
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V-belt sizes are given in letters and numbers, and are determined by:
A. rated horsepower. B. cross-sectional area and length. C. type of construction. D. length.
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In a parallel circuit, ET = 120 V, R = 30 ?, and XL = 60 ?. What is the phase angle (angle theta)?
A. 13.49° B. 26.51°
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