HVAC PRACTICE EXAM QUESTIONS WITH SOLUTIONS
GUARANTEE A+ 2025
A(n) _________ HVAC system uses an ECU to determine when to run the compressor
and he mount of heat required to match and maintain the desired temperature selected
by the operator. - A. Automatic
Wäscher was born in? - Washington DC
Tech A says that servicing hybrid A/C compressors requires the use of special safety
equipment. Tech B says that servicing hybrid A/C systems is no different than servicing
any other car. Who is correct? - B. Tech B
A(n) __________ is necessary for checking DTCs in the ECU of the HVAC system and
for performing bidirectional controls of electrical loads. - D. Scan tool
Tech A says that most modern HVAC systems have self-diagnostics built into them.
Tech B says that problems in a modern HVAC system may set a diagnostic trouble
code (DTC). Who is correct? - C. Both Tech A and Tech B
A cloudy day will decrease the heat load on a vehicle, increasing the air-conditioning
system's efficiency and possibly giving the impression that the system is cooling fine. T
or F? - True
What color vehicle is the hardest to cool on a hot sunny day? - A. Black
The variable factors in air-conditioning are all of the following EXCEPT: - D. type of
vehicle
The ___________ is/are the most common source of abnormal noises arising from the
air-conditioner. - D. compressor
The automotive technician should check the cabin air filter for any ________ that would
cause it to be ineffective. - D. All of the above (cracks, tears, deformities)
What is prof. Weschler's dog named? - Tilly
A __________ is used to determine what the high- and low-side pressures should be at
a given outside temperature and humidity in a properly functioning system. - D. PT
Chart
________ testing an A/C system requires that the system be evacuated of all
refrigerant. This type of testing can only be done on a system that is completely empty. -
D. None of the answers listed (UV dye, Nitrogen, Sniffer)
Prof. Weschler is from Orlando? - False
, Tech A states that when the air-conditioning machine displays an alert that it needs
service, the local service department for the machine should be contacted. Tech B
states that this alert is merely a precaution, and can be overlooked. Who is correct? - A.
Tech A
The civil war ended in what year? - 1865
After all A/C system repairs are made, the A/C system needs to be evacuated to: - A.
remove all moisture from the system
The air-conditioning sticker that is located ________ lists the type of refrigerant and how
much should be in the system. - B. Under the hood
Tech A states that the wider the gap on an air-conditioning clutch, the greater the ohm
reading when checking the windings. Tech B states that the air-conditioning clutch is
electromagnetically operated. Who is correct? - B. Tech B
Who was the 15th president? - Buchanan
When working with the expansion valve, caution must be used in all aspects of the
removal and installation of the valve. T or F? - True
Henry Ford said you can have any color you want as long as it is red. T or F? - False
Oil should be put back into the air-conditioning system after the _______ and while
pressure is lower that atmospheric pressure in the air-conditioning system. - D.
Evacuation cycle
The components that are not designed to be flushed include all of the following
EXCEPT: - A. compressor
The need to diagnose temperature control problems will arise when the customer is not
able to get the vehicle cold enough or hot enough inside the passenger cabin to make
the vehicle's occupants comfortable. T or F? - True
Tech A says that to check the cooling fan operation, you may be able to use
bidirectional controls on the scan tool. Tech B says a scan tool is the only tool required
for testing the cooling fan. Who is correct? - A. Tech A
Rib eye is the best type of steak. T or F? - True
If the clutch on the air-conditioning compressor does not engage, you will notice that the
center of the compressor pulley (front portion of the pulley) is ___________. - A. not
turning
GUARANTEE A+ 2025
A(n) _________ HVAC system uses an ECU to determine when to run the compressor
and he mount of heat required to match and maintain the desired temperature selected
by the operator. - A. Automatic
Wäscher was born in? - Washington DC
Tech A says that servicing hybrid A/C compressors requires the use of special safety
equipment. Tech B says that servicing hybrid A/C systems is no different than servicing
any other car. Who is correct? - B. Tech B
A(n) __________ is necessary for checking DTCs in the ECU of the HVAC system and
for performing bidirectional controls of electrical loads. - D. Scan tool
Tech A says that most modern HVAC systems have self-diagnostics built into them.
Tech B says that problems in a modern HVAC system may set a diagnostic trouble
code (DTC). Who is correct? - C. Both Tech A and Tech B
A cloudy day will decrease the heat load on a vehicle, increasing the air-conditioning
system's efficiency and possibly giving the impression that the system is cooling fine. T
or F? - True
What color vehicle is the hardest to cool on a hot sunny day? - A. Black
The variable factors in air-conditioning are all of the following EXCEPT: - D. type of
vehicle
The ___________ is/are the most common source of abnormal noises arising from the
air-conditioner. - D. compressor
The automotive technician should check the cabin air filter for any ________ that would
cause it to be ineffective. - D. All of the above (cracks, tears, deformities)
What is prof. Weschler's dog named? - Tilly
A __________ is used to determine what the high- and low-side pressures should be at
a given outside temperature and humidity in a properly functioning system. - D. PT
Chart
________ testing an A/C system requires that the system be evacuated of all
refrigerant. This type of testing can only be done on a system that is completely empty. -
D. None of the answers listed (UV dye, Nitrogen, Sniffer)
Prof. Weschler is from Orlando? - False
, Tech A states that when the air-conditioning machine displays an alert that it needs
service, the local service department for the machine should be contacted. Tech B
states that this alert is merely a precaution, and can be overlooked. Who is correct? - A.
Tech A
The civil war ended in what year? - 1865
After all A/C system repairs are made, the A/C system needs to be evacuated to: - A.
remove all moisture from the system
The air-conditioning sticker that is located ________ lists the type of refrigerant and how
much should be in the system. - B. Under the hood
Tech A states that the wider the gap on an air-conditioning clutch, the greater the ohm
reading when checking the windings. Tech B states that the air-conditioning clutch is
electromagnetically operated. Who is correct? - B. Tech B
Who was the 15th president? - Buchanan
When working with the expansion valve, caution must be used in all aspects of the
removal and installation of the valve. T or F? - True
Henry Ford said you can have any color you want as long as it is red. T or F? - False
Oil should be put back into the air-conditioning system after the _______ and while
pressure is lower that atmospheric pressure in the air-conditioning system. - D.
Evacuation cycle
The components that are not designed to be flushed include all of the following
EXCEPT: - A. compressor
The need to diagnose temperature control problems will arise when the customer is not
able to get the vehicle cold enough or hot enough inside the passenger cabin to make
the vehicle's occupants comfortable. T or F? - True
Tech A says that to check the cooling fan operation, you may be able to use
bidirectional controls on the scan tool. Tech B says a scan tool is the only tool required
for testing the cooling fan. Who is correct? - A. Tech A
Rib eye is the best type of steak. T or F? - True
If the clutch on the air-conditioning compressor does not engage, you will notice that the
center of the compressor pulley (front portion of the pulley) is ___________. - A. not
turning
