Refrigeration & Air Conditioning Mechanic Red Seal · Question
A megohmmeter (megger) is used to test what characteristic of an electrical motor's insulation?
A megohmmeter applies a high DC voltage to measure the resistance of the insulation, identifying potential breakdowns or shorts.
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Question: A megohmmeter (megger) is used to test what characteristic of an electrical motor's insulation?
Answer options: ✅ Insulation resistance.
- Current draw.
- Voltage drop.
- Continuity.
Correct answer: Insulation resistance.
Explanation: A megohmmeter applies a high DC voltage to measure the resistance of the insulation, identifying potential breakdowns or shorts.
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- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
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