Hvac unit 41 review 2023 updated

Hvac unit 41 review 2023 updated Before installing a gauge on the high-pressure side of a system, you should do which of the following? - correct answer A. Turn on the system. B. Turn off the system. C. Adjust the system to a neutral position. D. Have a cylinder approved by the DOT nearby. ANS: B. Capacitors should be shorted with a _____ before checking with an ohmmeter. - correct answer 20,000 ohm Resistor The high- and low-side pressures on an operating air-conditioning system can be converted to the _____ and _____ temperatures by using a temperature/pressure relationship chart. - correct answer Evaporating and Condensing Why do most air-conditioning systems not need a defrost system? - correct answer A typical standard-efficiency evaporator under standard conditions will operate at a temperature of - correct answer A. 30°F. B. 40°F. C. 50°F. D. 60°F. ANS: The typical temperature difference between the entering air and the boiling refrigerant on a standard air-conditioning evaporator is _____°F - correct answer When the ambient outside air temperature is 95°F and the unit is a high-efficiency unit, the lowest condensing refrigerant temperature when the unit is operating properly is - correct answer A. 110°F. B. 115°F. C. 120°F. D. 125°F. ANS: When the outside ambient air temperature is 90°F, the temperature of the condensing refrigerant in a standard-efficiency unit should be approximately - correct answer A. 120°F. B. 130°F. C. 140°F. D. 150°F.