ASE A7 (questions & answers) already
passed
An airbag system needs to be disarmed during an evaporator core replacement. Technician A
says that it is necessary to remove power from the system prior to component removal.
Technician B says that the inflatable devices should be laid "face up" in a secure area after being
removed from a vehicle. Who is correct? - correct answer ✔✔Both A and B
An orifice tube performs any of these jobs in the A/C system EXCEPT:
A. Meters refrigerant into the evaporator core
B. Filters foreign particles
C. Separates the high side from the low side
D. Opens and closes to regulate pressure on the low side - correct answer ✔✔D. Opens and
closes to regulate pressure on the low side
A technician connects a scan tool to a late model vehicle to troubleshoot a problem in the ATC
system. The scan tool gives a fault of "data bus short to ground." Technician A says that the
problem could be a data wire rubbing against a sharp body component. Technician B says that
the problem could be a broken data wire. Who is correct? - correct answer ✔✔A Only
Any of these methods of R134a A/C system leak detection are acceptable EXCEPT:
A. Dye and black light
B. Electronic leak detector
C. Nitrogen and soapy water
D. Propane burner - correct answer ✔✔D. Propane burner
,Technician A says that an electronic blend door motor uses an analog signal to open and close.
Technician B says that an electronic mode door motor uses a feedback device to indicate the
position of the door. Who is right? - correct answer ✔✔B Only
What is the most likely cause for a serpentine drive belt to slip under heavy loads?
A. Surface cracks on the inside of the belt
B. Belt is stretched one quarter inch
C. Seized tensioner
D. Glazed belt - correct answer ✔✔C. Seized tensioner
Any of these practices should be followed when interacting with airbag system components
EXCEPT:
A. Unhook the negative battery cable prior to beginning work
B. Store inflatable components "face up" in a secure area
C. Disconnect the airbag indicator prior to beginning work
D. Carefully carry inflatable components holding them away from the body - correct answer
✔✔C. Disconnect the airbag indicator prior to beginning work
Any of these methods to verify that the evaporator core is leaking EXCEPT:
A. Using an electronic leak detector at the A/C duct outlets
B. Using an ultrasonic leak detector at the HVAC case drain tube
C. Injecting dye into the system and using a black light to inspect the substance exiting the HVAC
case drain tube
D. Using a refrigerant identifier at the low side fitting - correct answer ✔✔D. Using a refrigerant
identifier at the low side fitting
A vehicle with rear heat and air has a rear heater that does not get warm enough. Technician A
says that a crimped heater pipe could be the cause. Technician B says that a partially blocked
rear heater core could be the cause. Who is correct? - correct answer ✔✔Both A and B
, An R134a A/C system is being recharged. Technician A says that an A/C system can be accurately
charged by monitoring pressure and temperature. Technician B says that the A/C system should
be treated with refrigerant dye any time that work has been performed so that future leak
testing will be possible. Who is correct? - correct answer ✔✔B Only
The HVAC fuse blows each time the A/C switch is turned on. Technician A says that an open low
side switch could be the cause. Technician B says that a shorted A/C clutch relay coil could be
the cause. Who is correct? - correct answer ✔✔B Only
A vehicle with an automatic temperature control (ATC) system is being diagnosed. Technician A
says that the ATC trouble codes can be retrieved by depressing a sequence of buttons on the
ATC control head. Technician B says that the trouble code reveals which area needs to be
repaired in an ATC system. Who is correct? - correct answer ✔✔Both A and B
Any of these conditions can cause elevated high side pressures EXCEPT:
A. Refrigerant overcharge
B. Restricted airflow to the condenser
C. Poor airflow across the evaporator
D. A slipping fan clutch - correct answer ✔✔C. Poor airflow across the evaporator
Which of these oils is the standard oil used by OEMs in (nonhybrid) R134a systems?
A. Mineral oil
B. 10A30
C. Ester oil
D. Polyalkylene glycol (PAG) - correct answer ✔✔D. Polyalkylene glycol (PAG)
passed
An airbag system needs to be disarmed during an evaporator core replacement. Technician A
says that it is necessary to remove power from the system prior to component removal.
Technician B says that the inflatable devices should be laid "face up" in a secure area after being
removed from a vehicle. Who is correct? - correct answer ✔✔Both A and B
An orifice tube performs any of these jobs in the A/C system EXCEPT:
A. Meters refrigerant into the evaporator core
B. Filters foreign particles
C. Separates the high side from the low side
D. Opens and closes to regulate pressure on the low side - correct answer ✔✔D. Opens and
closes to regulate pressure on the low side
A technician connects a scan tool to a late model vehicle to troubleshoot a problem in the ATC
system. The scan tool gives a fault of "data bus short to ground." Technician A says that the
problem could be a data wire rubbing against a sharp body component. Technician B says that
the problem could be a broken data wire. Who is correct? - correct answer ✔✔A Only
Any of these methods of R134a A/C system leak detection are acceptable EXCEPT:
A. Dye and black light
B. Electronic leak detector
C. Nitrogen and soapy water
D. Propane burner - correct answer ✔✔D. Propane burner
,Technician A says that an electronic blend door motor uses an analog signal to open and close.
Technician B says that an electronic mode door motor uses a feedback device to indicate the
position of the door. Who is right? - correct answer ✔✔B Only
What is the most likely cause for a serpentine drive belt to slip under heavy loads?
A. Surface cracks on the inside of the belt
B. Belt is stretched one quarter inch
C. Seized tensioner
D. Glazed belt - correct answer ✔✔C. Seized tensioner
Any of these practices should be followed when interacting with airbag system components
EXCEPT:
A. Unhook the negative battery cable prior to beginning work
B. Store inflatable components "face up" in a secure area
C. Disconnect the airbag indicator prior to beginning work
D. Carefully carry inflatable components holding them away from the body - correct answer
✔✔C. Disconnect the airbag indicator prior to beginning work
Any of these methods to verify that the evaporator core is leaking EXCEPT:
A. Using an electronic leak detector at the A/C duct outlets
B. Using an ultrasonic leak detector at the HVAC case drain tube
C. Injecting dye into the system and using a black light to inspect the substance exiting the HVAC
case drain tube
D. Using a refrigerant identifier at the low side fitting - correct answer ✔✔D. Using a refrigerant
identifier at the low side fitting
A vehicle with rear heat and air has a rear heater that does not get warm enough. Technician A
says that a crimped heater pipe could be the cause. Technician B says that a partially blocked
rear heater core could be the cause. Who is correct? - correct answer ✔✔Both A and B
, An R134a A/C system is being recharged. Technician A says that an A/C system can be accurately
charged by monitoring pressure and temperature. Technician B says that the A/C system should
be treated with refrigerant dye any time that work has been performed so that future leak
testing will be possible. Who is correct? - correct answer ✔✔B Only
The HVAC fuse blows each time the A/C switch is turned on. Technician A says that an open low
side switch could be the cause. Technician B says that a shorted A/C clutch relay coil could be
the cause. Who is correct? - correct answer ✔✔B Only
A vehicle with an automatic temperature control (ATC) system is being diagnosed. Technician A
says that the ATC trouble codes can be retrieved by depressing a sequence of buttons on the
ATC control head. Technician B says that the trouble code reveals which area needs to be
repaired in an ATC system. Who is correct? - correct answer ✔✔Both A and B
Any of these conditions can cause elevated high side pressures EXCEPT:
A. Refrigerant overcharge
B. Restricted airflow to the condenser
C. Poor airflow across the evaporator
D. A slipping fan clutch - correct answer ✔✔C. Poor airflow across the evaporator
Which of these oils is the standard oil used by OEMs in (nonhybrid) R134a systems?
A. Mineral oil
B. 10A30
C. Ester oil
D. Polyalkylene glycol (PAG) - correct answer ✔✔D. Polyalkylene glycol (PAG)
