A compressor crankcase heater is used to:
A) Encourage refrigerant to return to the compressor crankcase for the next start up cycle.
B) Keep the motor winding warm for improved energy efficiency.
C) Prevent off cycle refrigerant migration to the compressor crankcase.
D) Maintain the crankcase pressure above a vacuum.
C
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a. fly ash b. hydrated lime c. silica fume d. diatomaceous earth
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A(n) ____________________ is used as a power system to supply critical electronic equipment.
Fill in the blank(s) with the appropriate word(s).
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Working in a radioactive environment is an example of a ____________ task.
A. dull B. dirty C. difficult D. dangerous
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