2. A vehicle blows only warm air when the
heater is on high output. Technician A says
this could be a restricted heater control valve.
Technician B says this could be caused by a
low coolant level. Who's correct?
heater is on high output. Technician A says
this could be a restricted heater control valve.
Technician B says this could be caused by a
low coolant level. Who's correct?
3. Two technicians are discussing heat
transfer in an automotive A/C system.
Technician A says as refrigerant changes
from gas to liquid it receives heat. Technician
B says as refrigerant changes from liquid to
gas it releases heat. Who's correct?
transfer in an automotive A/C system.
Technician A says as refrigerant changes
from gas to liquid it receives heat. Technician
B says as refrigerant changes from liquid to
gas it releases heat. Who's correct?
4. Technician A says a bad relay can prevent
A/C clutch engagement. Technician B says a
loose serpentine belt can prevent clutch
engagement. Who's correct?
A/C clutch engagement. Technician B says a
loose serpentine belt can prevent clutch
engagement. Who's correct?
5. Technician A says that evacuating a
system will remove moisture and humidity.
Technician B says its important to evacuate
the system any time it's been opened to the
atmosphere. Who's correct?
system will remove moisture and humidity.
Technician B says its important to evacuate
the system any time it's been opened to the
atmosphere. Who's correct?
6. Technician A says oil residue on an A/C
hose may indicate a leak in the system.
Technician B says its not necessary to
replace the oil lost in the leak. Who's correct?
hose may indicate a leak in the system.
Technician B says its not necessary to
replace the oil lost in the leak. Who's correct?
7. Technician A says mineral oil may be
used in 134a systems. Technician B says A/C
oil mixes with the refrigerant to lubricate the
compressor, seals, o-rings etc. in the system.
Who's correct?
used in 134a systems. Technician B says A/C
oil mixes with the refrigerant to lubricate the
compressor, seals, o-rings etc. in the system.
Who's correct?
8. A vehicle has a high high side pressure.
All of these can cause this condition except:
All of these can cause this condition except:
9. Technician A says a frozen point on an A/C
component or connection indicates a
restriction in the system. Technician B says a
frozen expansion valve will cause a low low
side pressure. Who's correct?
component or connection indicates a
restriction in the system. Technician B says a
frozen expansion valve will cause a low low
side pressure. Who's correct?
10. Two technicians are discussing the
cycling clutch system. Technician A says the
temperature cycling clutch switch uses a bulb
placed on the inlet port of the evaporator core.
Technician B says a typical pressure cycling
switch is located on the accumulator or the
low side of a system. Who's Correct.
cycling clutch system. Technician A says the
temperature cycling clutch switch uses a bulb
placed on the inlet port of the evaporator core.
Technician B says a typical pressure cycling
switch is located on the accumulator or the
low side of a system. Who's Correct.
| A-7 Heating and Air Conditioning Sample Questions |
| Free A.S.E. Study Guide A Study Guide for the Automotive Technician |
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1. A technician installs a set of A/C gauges
on a vehicle with poor A/C performance. The
high side is low and the low side is high. This
indicates a:
on a vehicle with poor A/C performance. The
high side is low and the low side is high. This
indicates a: