ASE HVAC Exam Practice Questions With
Correct Answers
Referring to the figure above, the blend door gets jammed in the middle of the travel area. What
is the most likely system fault? The HVAC air temp could not be regulated.
Which AC related procedure would the above tool be used for? Testing the refrigerant for
impurities.
Referring to the figure above, what would the HVAC malfunction if the component became
restricted? Low airflow from the ducts.
Referring to the figure above, the AC compressor clutch will not engage. Tech A says that the AC
clutch relay could be bypassed with a fused jumper to test the load side of the circuit. Tech B
says that fuse 17 sends power to the AC compressor clutch relay. Who is right? A only
A hissing noise is heard in the engine compartment for approximately one minute after the
engine is shut off. Tech A says that the AC system equalization makes a noise. Tech B says the
heater core makes a noise. Who is right? A only
The vacuum check valve was missing from the circuit but the remaining hoses are still
connected. Tech A says that the modes would be stuck in the heat mode and not move. Tech B
says that mode actuators would work normal until the vehicle drove up steep hills. Who is right?
B only
Correct Answers
Referring to the figure above, the blend door gets jammed in the middle of the travel area. What
is the most likely system fault? The HVAC air temp could not be regulated.
Which AC related procedure would the above tool be used for? Testing the refrigerant for
impurities.
Referring to the figure above, what would the HVAC malfunction if the component became
restricted? Low airflow from the ducts.
Referring to the figure above, the AC compressor clutch will not engage. Tech A says that the AC
clutch relay could be bypassed with a fused jumper to test the load side of the circuit. Tech B
says that fuse 17 sends power to the AC compressor clutch relay. Who is right? A only
A hissing noise is heard in the engine compartment for approximately one minute after the
engine is shut off. Tech A says that the AC system equalization makes a noise. Tech B says the
heater core makes a noise. Who is right? A only
The vacuum check valve was missing from the circuit but the remaining hoses are still
connected. Tech A says that the modes would be stuck in the heat mode and not move. Tech B
says that mode actuators would work normal until the vehicle drove up steep hills. Who is right?
B only
