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Master of Climate: The Ultimate HVAC 101 Trivia Challenge
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What is the function of a crankcase heater in an outdoor HVAC unit?
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50-50
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Audience
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A
To heat the indoor air
B
To prevent refrigerant from mixing with and diluting the compressor oil during off-cycles
C
To speed up the defrost cycle
D
To keep the fan blades from freezing
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