How does an air sensing tstat prevent frost on a medium temperature evaporator?
a. It has a narrow temperature swing to prevent frost buildup.
b. It has a wide temperature swing to allow time to defrost.
c. The tstat won’t start the compressor until the evaporator frost has melted.
d. The tstat knows when to go into defrost.
b. It has a wide temperature swing to allow time to defrost.
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Fill in the blank(s) with the appropriate word(s).A recent sensitivity analysis of a public works project indicates that the expected present worth is $83,000. If there is a 20% chance that the PW will be the pessimistic one of $45,000 and 50% chance that it will be the most likely one of $72,000, the optimistic PW is closest to: (choose one)
(a) $89,520 (b) $118,380 (c) $126,670 (d) $138,540
During loop proving, the process must be _____
A) oscillating B) live C) active D) simulated
The rotor of the AC brushless servo motor has high-resistance conducting bars __________.
A. to reduce a build-up of CEMF B. to prevent rotation when it is single-phased C. to prevent overheating when the rotor is stationary