313D Residential Air Conditioning Systems Mechanic
Timed Exam Mode - Simulated Conditions
The 313D Residential Air Conditioning Systems Mechanic Certificate of Qualification exam, administered by Skilled Trades Ontario, validates competency in installing, servicing, and maintaining residential air conditioning and heat pump systems.
What is the primary function of a contactor in a residential air conditioning condensing unit?
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A
To step down the voltage for the control circuit.
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B
To switch the high-amperage loads of the compressor and condenser fan motor.
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C
To protect the circuit from overcurrent conditions.
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D
To store an electrical charge to help the motors start.
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