HVAC (EPA CERTIFICATION EXAM SECTION 608)|2023/24 UPDATE|GRADED A+

How many types of HVAC certifications are there? There are 4 types. What does a metering device do? The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. What is absorbed in the evaporator? Heat is absorbed in the evaporator. What happens in the evaporator? Heat is absorbed in the evaporator and causes the refrigerant to boil from liquid to vapor. At the outlet of the evaporator the refrigerant is what? The refrigerant is now a low temperature, low pressure vapor. As the refrigerant expels heat, the refrigerant condenses to a what? It condenses to a liquid. At the condenser outlet what pressure is the refrigerant? The refrigerant is a high pressure liquid. What is a metering device used for? The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. A system that uses a capillary tube or fixed bore metering device is usually equipped with a blank? Accumulator which would be located in the suction line directly following the evaporator. A system that uses a thermostatic expansion valve is usually equipped with a what? A receiver, which would be located in the liquid line directly following the condenser. The compound gauge is what color? Blue. The high pressure gauge is what color? Red. The blank measures low pressure (psig) and vacuum (inches Hg.). Compound gauge. What does the high pressure gauge measure. It measures high side (discharge) pressure. EPA regulations require that hoses be equipped with what? Low loss fittings that will minimize refrigerant loss when hoses are disconnected. The stratosphere is located where? Between 10 and 30 miles above sea level. What is the stratosphere comprised of? Ozone.