Question 1
When the defrost setting is selected, the compressor operates.
(True or False)
CORRECT ANSWER
True
Question 2
R744 refrigerant is pure CO2
(True or False)
CORRECT ANSWER
True
Question 3
Technician A says on R134a systems, you may not find any evidence of oil, even with a
leak, because the lubricant is water soluble, and could wash away.
Technician B says never use compressed air to leak test or pressure test an R134a system.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
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@THE STUDY VAULT
,Question 4
Technician A says when checking for a leak using an Electronic Leak Detector, you check
from the bottom to the top of the AC component area.
Technician B says most OEMS (original equipment manufacturers) recommend using an
Electronic Leak Detector.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
Question 5
Technician A says you can find the refrigerant charge amount on a decal under the hood.
Technician B says the best way to make sure the air-conditioning system is properly
charged is to remove all refrigerant from the system and reinstall the proper amount of
refrigerant.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
Question 6
An Automatic Temperature Control system that uses a BCM (Body Control Module) is
being diagnosed on a 2008 vehicle using a scan tool.
Technician A says you need a laptop computer with software to diagnose any of these
systems.
Technician B says you connect the scan tool, turn on the ignition and use the menus to find
your system and tests.
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,Which technician is correct ?
CORRECT ANSWER
Technician B only
Question 7
An ATC (Automatic Temperature Control) system is being diagnosed for a high air outlet
temperature.
Technician A says it is possible for a malfunctioning ATC control system to prevent correct
operation even when the refrigerant system is operating to specs.
Technician B says you should use a diagnostic scan tool or laptop computer to identify ATC
problems.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
Question 8
Which of the following is the most important measurement done when replacing a
compressor clutch?
a. Coil voltage drop
b. Coil Current (ampere) draw
c. Air gap
d. Coil resistance
CORRECT ANSWER
3
@THE STUDY VAULT
, Air gap
Question 9
All of the following could cause the high side pressure in an AC system to be higher than
normal, EXCEPT:
a. Refrigerant overcharge
b. Restricted condenser air flow
c. Restricted evaporator air flow
d. Broken compressor reed valve
CORRECT ANSWER
Broken compressor reed valve
Question 10
Technician A says the pressure sensor disengages the compressor when low pressure is
sensed because low refrigerant flow could result in a lack of lubrication and seize the
compressor.
Technician B says air conditioning systems using a multi-pressure switch will display a data
line for system pressure on the scan tool DATA parameter list.
Which technician is correct ?
CORRECT ANSWER
Technician A only
Question 11
Which of the following refrigerant oil is recommended for use in a hybrid electric
compressor?
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When the defrost setting is selected, the compressor operates.
(True or False)
CORRECT ANSWER
True
Question 2
R744 refrigerant is pure CO2
(True or False)
CORRECT ANSWER
True
Question 3
Technician A says on R134a systems, you may not find any evidence of oil, even with a
leak, because the lubricant is water soluble, and could wash away.
Technician B says never use compressed air to leak test or pressure test an R134a system.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
1
@THE STUDY VAULT
,Question 4
Technician A says when checking for a leak using an Electronic Leak Detector, you check
from the bottom to the top of the AC component area.
Technician B says most OEMS (original equipment manufacturers) recommend using an
Electronic Leak Detector.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
Question 5
Technician A says you can find the refrigerant charge amount on a decal under the hood.
Technician B says the best way to make sure the air-conditioning system is properly
charged is to remove all refrigerant from the system and reinstall the proper amount of
refrigerant.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
Question 6
An Automatic Temperature Control system that uses a BCM (Body Control Module) is
being diagnosed on a 2008 vehicle using a scan tool.
Technician A says you need a laptop computer with software to diagnose any of these
systems.
Technician B says you connect the scan tool, turn on the ignition and use the menus to find
your system and tests.
2
@THE STUDY VAULT
,Which technician is correct ?
CORRECT ANSWER
Technician B only
Question 7
An ATC (Automatic Temperature Control) system is being diagnosed for a high air outlet
temperature.
Technician A says it is possible for a malfunctioning ATC control system to prevent correct
operation even when the refrigerant system is operating to specs.
Technician B says you should use a diagnostic scan tool or laptop computer to identify ATC
problems.
Which technician is correct ?
CORRECT ANSWER
Both Technician A & B
Question 8
Which of the following is the most important measurement done when replacing a
compressor clutch?
a. Coil voltage drop
b. Coil Current (ampere) draw
c. Air gap
d. Coil resistance
CORRECT ANSWER
3
@THE STUDY VAULT
, Air gap
Question 9
All of the following could cause the high side pressure in an AC system to be higher than
normal, EXCEPT:
a. Refrigerant overcharge
b. Restricted condenser air flow
c. Restricted evaporator air flow
d. Broken compressor reed valve
CORRECT ANSWER
Broken compressor reed valve
Question 10
Technician A says the pressure sensor disengages the compressor when low pressure is
sensed because low refrigerant flow could result in a lack of lubrication and seize the
compressor.
Technician B says air conditioning systems using a multi-pressure switch will display a data
line for system pressure on the scan tool DATA parameter list.
Which technician is correct ?
CORRECT ANSWER
Technician A only
Question 11
Which of the following refrigerant oil is recommended for use in a hybrid electric
compressor?
4
@THE STUDY VAULT
