Residential HVAC Installation Practice Exam

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Prepare for your Residential HVAC Installation test with our engaging quizzes and in-depth multiple-choice questions. Each question comes with hints and detailed explanations to ensure mastery of the subject matter. Get ready for your exam and boost your confidence!

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Only two substances should be in the refrigeration system for proper operation. They are _ and oil.

Refrigerant and lubricant
Refrigerant and oil
Compressor and oil
Lubricant and coolant

The correct answer is: Refrigerant and oil

The correct answer is B. Refrigerant and oil are the only two substances that should be in the refrigeration system for proper operation. Refrigerant is responsible for absorbing and releasing heat, while oil is necessary to lubricate the moving parts of the compressor. Together, they ensure the efficient and smooth operation of the HVAC system. Option A, refrigerant and lubricant, is incorrect because lubricant is not the correct term for the substance needed in the refrigeration system; it should be oil instead. Option C, compressor and oil, is incorrect because the compressor is a component of the system, not a substance that should be present in the refrigeration system. Option D, lubricant and coolant, is incorrect because coolant is not a substance used in the refrigeration system; refrigerant is the correct term for the substance in this context.