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Master of HVAC: The Ultimate Heating & Cooling Maintenance Quiz
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Which of the following is a sign that an HVAC system's ductwork may have significant leaks?
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Hint
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⚖️
50-50
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Audience
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A
Uneven heating or cooling between rooms and high dust levels
B
A perfectly silent operating system
C
Lower than normal energy bills
D
A blue pilot light on the furnace
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