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EPA Section 608 Technician Certification (AHRI Study Guide 3rd Edition) with Complete Solutions

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EPA Section 608 Technician Certification (AHRI Study Guide 3rd Edition) with Complete Solutions What are the typical uses of the center port of gauge set? - Correct Answer Used during evacuation, charging and recovery procedures. What color are the gauges on a manifold gauge set? - Correct Answer Low pressure is blue, High pressure is red. What are the typical ranges of pressure measurements used on the gauges of a manifold gauge set? - Correct Answer High side is 0 to 500 PSIG; Low side is 0 to 350 PSIG and 0 to 30 in. Hg below atmospheric pressure. Is the refrigerant leaving a condenser at a high or low pressure? Is it a liquid or a gas? - Correct Answer High pressure, liquid. Is the refrigerant entering the expansion valve (variable metering device) a liquid or gas? - Correct Answer Liquid, high pressure. Is the pressure of the refrigerant entering the compressor high or low? - Correct Answer Low pressure vapor. Where in a refrigerant circuit does a liquid boil to absorb heat? - Correct Answer In the evaporator. The refrigerant in the suction line is a gas that has been heated above its saturation. What is this condition called? - Correct Answer Superheated vapor. What can cause liquid refrigerant to migrate to a compressor crankcase? - Correct Answer If the compressor is located in the coldest location in the circuit. List two conditions that can quickly damage a compressor that is starting to run? - Correct Answer Operating while in a deep vacuum or when the service valves are closed.

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