The most effective means of fixture venting is generally considered to be the _____.
a. individual vent
b. wet vent
c. continuous vent
d. stack vent
a. individual vent
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When wood is burned in a wood stove, the chimney and/or vent piping can become coated with _____.
a. acid b. creosote c. ash d. minerals
Which of the following did French mathematician Jean Baptiste Joseph Fourier develop?
A. A means to break down any periodic waveform into a series of sine and/or cosine waves at multiples of the fundamental frequency. B. He created thermal interactions between free electrons and vibrating ions in a conductor. C. The formula for calculating shot noise contributed for a complete transistor. D. The relative measure of the desired signal power to the noise power.
The unit for measuring electrical resistance is _____.
A. amperes B. ohms C. volts D. watts
What is the purpose of the discharge line check valve?
A. To restrict the flow of refrigerant in the discharge line. B. To prevent the migration of liquid refrigerant back into the compressor in the heat mode. C. To prevent the migration of liquid refrigerant back into the compressor in the cool mode. D. To prevent the migration of liquid refrigerant back into the compressor in the off mode.