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

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.