ASE A5 EXAM LATEST ACTUAL EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES(VERIFIED
ANSWERS) |AGRADE
An EATC air conditioning system has low fan speed operation during high demand
situations, like in direct sunlight. Technician A says this is because something is
covering the sun load sensor's photo diode. Technician B says a sun load sensor is a
variable resistor and can be tested with an ohmmeter. Who is correct? - ANSWER:
Both A and B
A gurgling sound is heard coming from inside the dashboard of a vehicle. Technician
A says this is air trapped in the heater core. Technician B says this noise can be
caused by a blown head gasket. Who is correct? - ANSWER: Both A and B
A manifold gauge indicates a system has low discharge pressure. The MOST likely
cause of this condition is: - ANSWER: A damaged compressor reed valve.
The compressor is rapidly cycling on and off on a CCOT (cycling clutch orifice tube) air
conditioning system. Technician A says this condition can be caused by a low
refrigerant charge. Technician B says this could be caused by a faulty clutch cycling
switch. Who is correct? - ANSWER: Both A and B
Technician A says while performing a retrofit from R-12 refrigerant to R134a
refrigerant, the refrigerant must be recovered into a dedicated cylinder, they cannot
be mixed. Technician B says R-12 refrigerant functions at higher pressures than R-
134a refrigerant does. Who is correct? - ANSWER: Tech A
Technician A says an ambient temperature sensor senses cabin air temperature.
Technician B says a faulty ambient temperature sensor can prevent compressor
clutch engagement. Who is correct? - ANSWER: Tech B
During an initial inspection, the technician notices that one line on the receiver drier
is cooler than the other. This is caused by: - ANSWER: A restriction in the receiver
drier.
During a performance test on a CCOT system the manifold gauge indicates that the
high side pressure is low and the low side pressure is high. This is caused by a: -
ANSWER: Faulty compressor
An air conditioning system blows only warm air when the heater is on high output.
Technician A says this could be a faulty heater control valve. Technician B says this
could be caused by the cooling system's thermostat. Who is correct? - ANSWER:
Both A and B
Technician A says a fixed orifice tube varies the flow of refrigerant in relation to
temperature. Technician B says a fixed orifice tube is located between the condenser
, and the evaporator. Who is correct? - ANSWER: B Only (A fixed orifice tube provides
a consistent output, based upon the size of its orifice. It's a compromise between
idle and highway conditions)
Technician A says the expansion valve is located on the inlet port of the evaporator.
Technician B says the expansion valve's temperature sensing bulb is located near the
outlet port of the evaporator. Who is correct? - ANSWER: Both A and B
During a visual inspection an oily spot is found on a hose leading from the
compressor. Technician A says there may be a refrigerant leak in the system.
Technician B says today's R134a systems use mineral oil instead of the older R12
compatible PAG oil. Who is correct? - ANSWER: Tech A Only
An air conditioning system contains a thermostatic expansion valve. The suction line
leading to the compressor is cool to the touch. This indicates: - ANSWER: Normal
Condition
All of these are true about an accumulator EXCEPT: - ANSWER: This system contains
a thermostatic expansion valve to meter the refrigerant.
A vehicle has poor air conditioning performance. The customer has added R134a
refrigerant to the system. Technician A says to use a refrigerant identifier. Technician
B says refrigerant mixtures are not recommended, but will not affect system
pressures. Who is correct? - ANSWER: Tech A Only
Two technicians are discussing a CCOT air conditioning system. Technician A says the
system's pressure cycling clutch switch contains a bulb placed on the inlet port of the
evaporator core. Technician B says a pressure cycling switch is located on the low
side of the system. Who is correct? - ANSWER: Tech B Only
All these statements are true about a throttle position sensor EXCEPT: - ANSWER:
The ECM disengages the A/C clutch at idle.
(The compressor's clutch is not disengaged at idle, it's disengaged at WOT providing
additional power when needed)
Technician A says refrigerant flows from the top of the condenser to the bottom.
Technician B says a restriction in a condenser can cause damage to the compressor.
Who is correct? - ANSWER: Both A and B
A vehicle's air conditioning performance is reduced at low speeds and stop lights, but
cools at highway speeds. Which of these is MOST likely the cause of this condition? -
ANSWER: A missing fan shroud
Two technicians are discussing an inoperative electric blend door in an automatic air
conditioning system. Technician A says to inspect the blend door's wiring and
connections for an open circuit. Technician B says to troubleshoot this circuit with a
test light. Who is correct? - ANSWER: Tech A Only
CORRECT ANSWERS WITH RATIONALES(VERIFIED
ANSWERS) |AGRADE
An EATC air conditioning system has low fan speed operation during high demand
situations, like in direct sunlight. Technician A says this is because something is
covering the sun load sensor's photo diode. Technician B says a sun load sensor is a
variable resistor and can be tested with an ohmmeter. Who is correct? - ANSWER:
Both A and B
A gurgling sound is heard coming from inside the dashboard of a vehicle. Technician
A says this is air trapped in the heater core. Technician B says this noise can be
caused by a blown head gasket. Who is correct? - ANSWER: Both A and B
A manifold gauge indicates a system has low discharge pressure. The MOST likely
cause of this condition is: - ANSWER: A damaged compressor reed valve.
The compressor is rapidly cycling on and off on a CCOT (cycling clutch orifice tube) air
conditioning system. Technician A says this condition can be caused by a low
refrigerant charge. Technician B says this could be caused by a faulty clutch cycling
switch. Who is correct? - ANSWER: Both A and B
Technician A says while performing a retrofit from R-12 refrigerant to R134a
refrigerant, the refrigerant must be recovered into a dedicated cylinder, they cannot
be mixed. Technician B says R-12 refrigerant functions at higher pressures than R-
134a refrigerant does. Who is correct? - ANSWER: Tech A
Technician A says an ambient temperature sensor senses cabin air temperature.
Technician B says a faulty ambient temperature sensor can prevent compressor
clutch engagement. Who is correct? - ANSWER: Tech B
During an initial inspection, the technician notices that one line on the receiver drier
is cooler than the other. This is caused by: - ANSWER: A restriction in the receiver
drier.
During a performance test on a CCOT system the manifold gauge indicates that the
high side pressure is low and the low side pressure is high. This is caused by a: -
ANSWER: Faulty compressor
An air conditioning system blows only warm air when the heater is on high output.
Technician A says this could be a faulty heater control valve. Technician B says this
could be caused by the cooling system's thermostat. Who is correct? - ANSWER:
Both A and B
Technician A says a fixed orifice tube varies the flow of refrigerant in relation to
temperature. Technician B says a fixed orifice tube is located between the condenser
, and the evaporator. Who is correct? - ANSWER: B Only (A fixed orifice tube provides
a consistent output, based upon the size of its orifice. It's a compromise between
idle and highway conditions)
Technician A says the expansion valve is located on the inlet port of the evaporator.
Technician B says the expansion valve's temperature sensing bulb is located near the
outlet port of the evaporator. Who is correct? - ANSWER: Both A and B
During a visual inspection an oily spot is found on a hose leading from the
compressor. Technician A says there may be a refrigerant leak in the system.
Technician B says today's R134a systems use mineral oil instead of the older R12
compatible PAG oil. Who is correct? - ANSWER: Tech A Only
An air conditioning system contains a thermostatic expansion valve. The suction line
leading to the compressor is cool to the touch. This indicates: - ANSWER: Normal
Condition
All of these are true about an accumulator EXCEPT: - ANSWER: This system contains
a thermostatic expansion valve to meter the refrigerant.
A vehicle has poor air conditioning performance. The customer has added R134a
refrigerant to the system. Technician A says to use a refrigerant identifier. Technician
B says refrigerant mixtures are not recommended, but will not affect system
pressures. Who is correct? - ANSWER: Tech A Only
Two technicians are discussing a CCOT air conditioning system. Technician A says the
system's pressure cycling clutch switch contains a bulb placed on the inlet port of the
evaporator core. Technician B says a pressure cycling switch is located on the low
side of the system. Who is correct? - ANSWER: Tech B Only
All these statements are true about a throttle position sensor EXCEPT: - ANSWER:
The ECM disengages the A/C clutch at idle.
(The compressor's clutch is not disengaged at idle, it's disengaged at WOT providing
additional power when needed)
Technician A says refrigerant flows from the top of the condenser to the bottom.
Technician B says a restriction in a condenser can cause damage to the compressor.
Who is correct? - ANSWER: Both A and B
A vehicle's air conditioning performance is reduced at low speeds and stop lights, but
cools at highway speeds. Which of these is MOST likely the cause of this condition? -
ANSWER: A missing fan shroud
Two technicians are discussing an inoperative electric blend door in an automatic air
conditioning system. Technician A says to inspect the blend door's wiring and
connections for an open circuit. Technician B says to troubleshoot this circuit with a
test light. Who is correct? - ANSWER: Tech A Only
