Electronic overload relays employ a current ____ to sense the motor current.
A. diode
B. transformer
C. capacitor
D. varistor
Answer: B
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What is an internal parasite that migrates to the large intestines and remains there?
a. small strongyle c. large strongyle b. ascarid d. pinworm
The held open limit switch symbol is used for normally open contacts that are held open by the process
Indicate whether the statement is true or false
Which type of duct system is used on systems that have the air handler located at one end of the structure to be conditioned?
A. plenum-type duct system B. extended-plenum duct system C. reducing-extended-plenum duct system D. perimeter duct system
Copper water tube is available in three wall thicknesses designated as types ____ in order of decreasing wall thickness.
a. A, B, and C b. S, M, and L c. K, L, and M d. 1,2, and 3