Author Question: A device that does not switch on and off motors directly is a: A) Heavy-duty relay. B) Contactor. ... (Read 123 times)

ssal · **on:** Jul 24, 2018

A device that does not switch on and off motors directly is a:

A) Heavy-duty relay. B) Contactor. C) Light-duty relay. D) Motor starter.

Question 2

An air conditioner with a thermostatic expansion valve is operating with a condenser saturation temperature of 95F and a liquid-line temperature of 92F. The factory-specified subcooling for the current operating condition is 10F. The technician should:

A) Move some of the charge from the low side of the system to the high side of the system to balance the charge.
B) Leave the charge alone because it is cooling even better than factory specifications.
C) Add charge because the system is undercharged.
D) Recover charge because the system is overcharged.