An expansion joint is a device used to ____.
A. prevent damage between boiler sections
B. enlarge the expansion tank in the system
C. allow for expansion and contraction of the loop piping with water temperature changes
D. connect the manual vent into the system
Answer: C
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Bonding is often provided in order to ensure that systems have ____.
a. electricity b. electrical continuity c. security d. electrical connectivity
Too much air across the evaporator coil (moving too quickly) usually results in _____.
a. poor humidity control b. a high air-temperature difference c. poor compressor oil return d. evaporator coil damage
The distance between the sensor coil and the toothed ring in a magnetic induction sensor is referred to as the ____________________.
Fill in the blank(s) with the appropriate word(s).
Windshield washer pumps can be damaged if ________
A) Contaminated windshield washer fluid is used B) Pure water is used in freezing weather C) Ethylene glycol antifreeze is used D) All of the above