EPA Section 608 Technician Certification Study Guide questions with correct answers

What are the typical uses of the center port of gauge set? ans Used during evacuation, charging and recovery procedures. What color are the gauges on a manifold gauge set? ans 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? ans 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? ans High pressure, liquid. Is the refrigerant entering the expansion valve (variable metering device) a liquid or gas? ans Liquid, high pressure. Is the pressure of the refrigerant entering the compressor high or low? ans Low pressure vapor. Where in a refrigerant circuit does a liquid boil to absorb heat? ans In the evaporator. The refrigerant in the suction line is a gas that has been heated above its saturation. What is this condition called? ans Superheated vapor.