ESCO AIR CONDITIONING EXAM
COMPREHENSIVE HVAC SYSTEMS STUDY
GUIDE 2026
◉ 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
COMPREHENSIVE HVAC SYSTEMS STUDY
GUIDE 2026
◉ 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
