Air Conditioning Certification Exam Part 1 Questions And Answers

A technician has found an air conditioning system with a leak in the liquid line. After the line is repaired, the system is evacuated and properly retired. When the system is started, the compressor is noisy and running hot. The most probable cause of the noise is.... - ans-Lower oil in the system The standard unit for measuring the quantity of heat in a substance is.... - ans-The British Thermal Unit (Btu) Zero psia (pounds per square inch absolute) is.... - ans-Pressure which cannot be further reduced A liquid receiver is used to.... - ans-Store liquid refrigerant A low refrigerant charge in an air conditioning system will cause these symptoms... - ans-Low suction pressure and low discharge pressure A TXV sensing bulb which becomes detached from the suction line will cause these symptoms.... - ans-High suction pressure and higher than normal discharge pressure In an air conditioning system that uses a thermostatic expansion valve, the temperature of the evaporator outlet will usually be.... - ans-Warmer than the evaporator inlet The oil pressure safety switch is operated by.... - ans-The difference between crankcase pressure and oil pressure