Why should some refrigerant lines be insulated?
What will be an ideal response?
to prevent the system from absorbing excess heat
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Standard beams (or I-beams) are identified by the letter "____."
A. I B. M C. S D. W
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If a continuous connected load totals 120A, what is the minimum current-carrying capacity required for the feeder?
a. 150A b. 154A c. 170A d. 182A
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The Zener diode is a diode specially designed for ____.
a. rectification b. voltage regulation c. visual displays d. changing AC to DC
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If a valve is marked WOG on the body, what does this mean?
A. It is suitable for use with water, oil, or gas at 70° F. B. It is suitable for saturated steam pressure. C. The flow direction runs from left to right. D. The flow direction runs from right to left.
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