Esco Air Conditioning Complete Questions And Solutions Tested Answers

ESCO AIR CONDITIONING COMPLETE
QUESTIONS AND SOLUTIONS TESTED
ANSWERS
◉ The heat removed from the refrigerant by the condenser is
Answer: Both sensible and latent heat.


◉ An energy recovery ventilator is
Answer: an air to air heat exchanger to recover heat


◉ When testing the efficiency of an air-cooled condenser, the
refrigerant condensing temperature should be approximately
________ higher than the entering air temperature
Answer: 30°F


◉ When testing the efficiency of a water-cooled condenser, the
refrigerant condensing temperature should be approximately
_________ higher than the leaving water temperature
Answer: 10°F


◉ The first function condenser must perform is to
Answer: De-superheat


◉ A thermostatic expansion valve is designed to maintain
Answer: Constant evaporator superheat

, ◉ The automatic expansion valve is designed to maintain
Answer: Constant evaporator pressure


◉ The thermostatic expansion valve has three operating
pressures
Answer: Evaporator pressure, Spring pressure, and Sensor bulb
pressure


◉ When mounting a thermostatic expansion valve sensor bulb,
which of the following is not true
Answer: It must be installed lower than the valve body


◉ In an air conditioning system that uses a thermostatic
expansion valve, the temperature of the evaporator outlet will
usually be
Answer: Warmer than the evaporator inlet


◉ In automatic expansion valve is best suited
Answer: When the system load remains fairly constant


◉ Which of the following is not true of a capillary tube metering
device
Answer: They maintain a constant evaporator temperature