When a chiller using R-11 is operating, the low pressure side of the system ____.
A. always shows a positive pressure
B. is always in a vacuum
C. contains a mixture of oil and air
D. rejects oxygen and moisture
Answer: B
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The measure of the amount of water in the air compared to the maximum amount of water the air could hold at the same temperature and pressure is called the __________.
a. wet-bulb temperature b. dry-bulb temperature c. relative humidity d. dew point
In an air to air system, the compressor contactor controls the operation of the compressor motor and the ______________________________.
Fill in the blank(s) with the appropriate word(s).
A high-pressure atomizing oil burner delivers the oil into the combustion chamber at __________ psi.
A. 50 B. 100 C. 150 D. 200
The welding accessory that uses a steel surface and piece of flint is called a _____
a. sparker b. fuel-gas lighter c. friction lighter d. igniter