A solenoid is ________
A) a reversing relay that is used to start heat pumps
B) a valve that is controlled (opened and closed) by gravity and springs
C) a valve that is controlled (open and closed) by springs and a magnetic field produced by a coil
C
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Wobble plate compressors commonly use how many cylinders?
A) Four B) Five or seven C) Two D) Three
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Identify and state the historical significance of Herbert Croly.
What will be an ideal response?
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Which of the following is an acceptable working angle for a RWD driveshaft?
A) 1 degree B) 0 degrees C) 6 degrees D) None of these is correct.
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Which of the following refrigerants poses the greatest threat to the ozone layer?
a. CFC b. HCFC c. HFC d. Ammonia
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