An overload protector is usually wired in series with the motor's _________ winding.
A. start
B. run
C. common
Answer: C
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The density testing method that involves sending impulses into the soil is _____.
a. radar testing b. nuclear testing c. electrical density testing d. stroboscopic testing
What is the purpose of bypass piping on a hot water gas fired boiler?
A) ensure that the return water temperature does not drop too low B) to modulate the capacity of the heating system C) to allow the boiler to fire continuously, even with no heating load D) to relieve the extra pressure created by the circulating pump
When diagnosing the control circuit at the thermostat subbase, between which two terminals would a jumper wire be placed to check operation of the cooling circuit?
A. R and G B. R and W C. R and Y D. G and Y
Anhydrous ammonia is also known as refrigerant _____
a. R-771 b. A-717 c. A-771 d. R-717