ESCO AIR CONDITIONING HVAC
COMPLETE QUESTION SET WITH VERIFIED
SOLUTIONS GRADED A+
Question 1.
When topping off an operating system containing a blended refrigerant
ANSWER
introduce the refrigerant as a liquid into the low side using the throttling valve
Question 2.
A refrigerant overcharge in a capillary tube air conditioning system will cause the symptoms
ANSWER
High suction pressure and high discharge pressure
Question 3.
With an automatic expansion valve, an increase in evaporator load will cause the
ANSWER
Automatic expansion valve to close
Question 4.
In the evaporator
ANSWER
Latent heat is transferred from the refrigerated space to the refrigerant
Question 5.
Which of the following is the most important consideration in the selection of an evaporator coil.
Match the coil to the
ANSWER
Condensing unit and the latent/sensible loads
, Question 6.
The r134a0 for a high-pressure gauge reads 146 psig in the liquid line temperature at the condensing
unit is 95°F. What is the operating system subcooling
ANSWER
15°F
Question 7.
Which of the following is not true of a capillary tube metering device
ANSWER
They maintain a constant evaporator temperature
Question 8.
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
Question 9.
The thermostatic expansion valve has three operating pressures
ANSWER
Evaporator pressure, Spring pressure, and Sensor bulb pressure
Question 10.
A rise in evaporator pressure causes the automatic expansion valve to begin to
ANSWER
Close
Question 11.
An overcharge of refrigerant will cause
ANSWER
increased head pressure
COMPLETE QUESTION SET WITH VERIFIED
SOLUTIONS GRADED A+
Question 1.
When topping off an operating system containing a blended refrigerant
ANSWER
introduce the refrigerant as a liquid into the low side using the throttling valve
Question 2.
A refrigerant overcharge in a capillary tube air conditioning system will cause the symptoms
ANSWER
High suction pressure and high discharge pressure
Question 3.
With an automatic expansion valve, an increase in evaporator load will cause the
ANSWER
Automatic expansion valve to close
Question 4.
In the evaporator
ANSWER
Latent heat is transferred from the refrigerated space to the refrigerant
Question 5.
Which of the following is the most important consideration in the selection of an evaporator coil.
Match the coil to the
ANSWER
Condensing unit and the latent/sensible loads
, Question 6.
The r134a0 for a high-pressure gauge reads 146 psig in the liquid line temperature at the condensing
unit is 95°F. What is the operating system subcooling
ANSWER
15°F
Question 7.
Which of the following is not true of a capillary tube metering device
ANSWER
They maintain a constant evaporator temperature
Question 8.
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
Question 9.
The thermostatic expansion valve has three operating pressures
ANSWER
Evaporator pressure, Spring pressure, and Sensor bulb pressure
Question 10.
A rise in evaporator pressure causes the automatic expansion valve to begin to
ANSWER
Close
Question 11.
An overcharge of refrigerant will cause
ANSWER
increased head pressure
