Free ASE Study Guide Practice Test
True or False. Chlorine was found to do damage to the ozone layer? - ANS-True
True or False. Different refrigerant are ok to be mixed together. Pressure characteristics
are a little bit different but should not matter. - ANS-False. High pressure characteristics
between R12 and R134a vary considerably. Will result in high head pressure and high
system.
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?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-Tech A is correct
A squeal is heard only when the compressor clutch first engages. Technician A says this
is caused by a loose serpentine belt. Technician B says this is caused by a worn clutch
pulley bearing. Who is correct?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-Tech is correct
An air conditioning system with a variable displacement compressor has poor
performance in high demand situations. All of these could be the cause EXCEPT:
A. A low refrigerant charge.
B. A faulty control valve.
C. A faulty low pressure switch.
D. A weak compressor. - ANS-C
What kind of A/C compressor uses a control valve to alter system pressures -
ANS-Variable displacement compressor
True or False. Chlorine was found to do damage to the ozone layer? - ANS-True
True or False. Different refrigerant are ok to be mixed together. Pressure characteristics
are a little bit different but should not matter. - ANS-False. High pressure characteristics
between R12 and R134a vary considerably. Will result in high head pressure and high
system.
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?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-Tech A is correct
A squeal is heard only when the compressor clutch first engages. Technician A says this
is caused by a loose serpentine belt. Technician B says this is caused by a worn clutch
pulley bearing. Who is correct?
A. Tech A
B. Tech B
C. Both
D. Neither - ANS-Tech is correct
An air conditioning system with a variable displacement compressor has poor
performance in high demand situations. All of these could be the cause EXCEPT:
A. A low refrigerant charge.
B. A faulty control valve.
C. A faulty low pressure switch.
D. A weak compressor. - ANS-C
What kind of A/C compressor uses a control valve to alter system pressures -
ANS-Variable displacement compressor
