HVAC (EPA Certification Exam Section 608) Questions & Answers Already Passed!!

How many types of HVAC certifications are there? - Answer-There are 4 types. What does a metering device do? - Answer-The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. What is absorbed in the evaporator? - Answer-Heat is absorbed in the evaporator. What happens in the evaporator? - Answer-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? - Answer-The refrigerant is now a low temperature, low pressure vapor. As the refrigerant expels heat, the refrigerant condenses to a what? - Answer-It condenses to a liquid. At the condenser outlet what pressure is the refrigerant? - Answer-The refrigerant is a high pressure liquid. What is a metering device used for? - Answer-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? - Answer-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? - Answer-A receiver, which would be located in the liquid line directly following the condenser. The compound gauge is what color? - Answer-Blue.The high pressure gauge is what color? - Answer-Red. The blank measures low pressure (psig) and vacuum (inches Hg.). - Answer-Compound gauge. What does the high pressure gauge measure. - Answer-It measures high side (discharge) pressure. EPA regulations require that hoses be equipped with what? - Answer-Low loss fittings that will minimize refrigerant loss when hoses are disconnected. The stratosphere is located where? - Answer-Between 10 and 30 miles above sea level. What is the stratosphere comprised of? - Answer-Ozone. An Ozone molecule consists of what? - Answer-Three oxygen atoms (03).