What units are used to measure pressure in HVACR systems in the United States?
A) Newtons B) Kilopascals (kPa)
C) Pounds per square inch absolute (psia) D) Pounds per square inch gauge (psig)
D
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According to the NEC®, neutral conductors size No. 6 and smaller must have a continuous marking of white or _____.
a. black b. yellow c. gray d. red
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In the United States, what is the term for the softest coal? The hardest coal?
What will be an ideal response?
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A step bore master cylinder has two different sizes of:
A. reservoir sections. B. vent ports. C. cylinder bores. D. none of the above.
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Why must zeotropic refrigerant leave the cylinder as a liquid?
A) To reduce the risk of noncondensables entering the system B) To avoid fractionation C) To avoid condensation D) To keep the pressure in the cylinder at a safe level
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