In a mercury bulb-type of float switch, a set of mercury contacts is located inside the ____.
a. conductor
b. bulb
c. motor
d. tank
b. bulb
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True or False: Section 250.54 of the NEC states that the earth provides an effective ground-fault current path.
Answer the following statement true (T) or false (F)
Time reports contain valuable information for supervisors that include all of the following except _____.
a. additional work done b. equipment used c. hours worked d. production rates Copyright
Atmospheric pressure is affected by:
A) Humidity, temperature, and geosynchronous location. B) Altitude and temperature. C) Altitude, temperature, and humidity. D) Magnetic pole location, altitude, and temperature.
The purpose of an externally equalized thermostatic expansion valve is to ____.
A. compensate for excessive evaporator pressure drop B. allow system to equalize faster C. prevent the expansion valve from frosting up D. allow refrigerant to expand in the compressor