AUT 135 Final Exam Actual Exam 2026 |
Automotive Technology | Complete
Questions and Correct Answers | Verified
Answers | Just Released
What happens when the low-voltage current flow in the coil primary
winding is interrupted by the switching device? ---------CORRECT
ANSWER-----------------both "The magnetic field around the primary
winding collapses" and "The movement of the magnetic field across the
winding induces a high voltage in the secondary winding"
To monitor the vapor purge in most systems, the PCM changes the duty
cycle of the purge solenoid while monitoring the ______. ---------
CORRECT ANSWER-----------------STFT
Which of the following is NOT an engine exhaust pollutant that is
changed by the catalytic converter? ---------CORRECT ANSWER-------------
----CO2
,An engine is being diagnosed for a lean running condition. Technician A
checks for air leaks in the intake. Technician B checks for alcohol in the
fuel. Who is correct? ---------CORRECT ANSWER-----------------both
Which of the following components is part of the primary and
secondary ignition circuits? ---------CORRECT ANSWER-----------------
ignition coil
Which of the following is a cause of detonation? ---------CORRECT
ANSWER-----------------all correct
If the throttle is held wide open while the engine is cranked over by the
starter motor, the fuel management system will enter _____ mode. -----
----CORRECT ANSWER-----------------clear flood
Preliminary checks are being discussed. Technician A says to run
specific fuel injection tests first. Technician B says most driveability
concerns are caused by PCM-related problems. Who is correct? ---------
CORRECT ANSWER-----------------neither
,Fuel lines are being discussed. Technician A says when installing flexible
tubing, always use new clamps. Technician B says ordinary rubber hose
may be used to replace a kinked steel fuel line. Who is correct? ---------
CORRECT ANSWER-----------------a only
The customer complains of a loss of power at highway speeds and a
rough running engine at all speeds. A five-gas analyzer reveals these
measurements at 2,500 rpm: HC = 700 ppm, CO = 0.2%, CO2 = 9.2%, O2
= 6.2%, and NOX = 330 ppm. What is the most likely cause? ---------
CORRECT ANSWER-----------------lean misfire
A technician connects a DMM with a MIN/MAX/AVG function to the
output of an oxygen sensor. The engine is run at 2000 RPM for several
minutes. During the test, the voltage toggles rapidly between 150 and
900 millivolts. At the end of the test, the MAX voltage was .967 V, the
MIN voltage was .087 V, and the AVG voltage was .683 V. Technician A
says the sensor is faulty and should be replaced. Technician B says
there could be a vacuum leak that caused the sensor voltage to have a
higher than normal average. Who is correct? ---------CORRECT ANSWER-
----------------neither
Technician A says the biggest disadvantage of using CNG as a fuel is that
the large amount space occupied by fuel cylinders limits the driving
range of the vehicle. Technician B says bi-fuel vehicles are equipped to
, store both CNG and gasoline and will run on either. Who is correct? -----
----CORRECT ANSWER-----------------both
Each fuel injector has a _____-wire connector. ---------CORRECT
ANSWER-----------------two
If a flex fuel vehicle has half a tank of E85 onboard and the driver then
fills the tank up with regular gasoline what will happen? ---------
CORRECT ANSWER-----------------The system will automatically adjust
and run normally
Technician A says the bearings in a turbocharger are cooled by engine
oil. Technician B says turbocharger bearings are cooled by engine
coolant. Who is correct? ---------CORRECT ANSWER-----------------both
Injector cleaning is being discussed. Technician A uses a wire brush to
clean the tips of the injectors. Technician B soaks the injector in
cleaning solvent. Who is correct? ---------CORRECT ANSWER-----------------
neither
Automotive Technology | Complete
Questions and Correct Answers | Verified
Answers | Just Released
What happens when the low-voltage current flow in the coil primary
winding is interrupted by the switching device? ---------CORRECT
ANSWER-----------------both "The magnetic field around the primary
winding collapses" and "The movement of the magnetic field across the
winding induces a high voltage in the secondary winding"
To monitor the vapor purge in most systems, the PCM changes the duty
cycle of the purge solenoid while monitoring the ______. ---------
CORRECT ANSWER-----------------STFT
Which of the following is NOT an engine exhaust pollutant that is
changed by the catalytic converter? ---------CORRECT ANSWER-------------
----CO2
,An engine is being diagnosed for a lean running condition. Technician A
checks for air leaks in the intake. Technician B checks for alcohol in the
fuel. Who is correct? ---------CORRECT ANSWER-----------------both
Which of the following components is part of the primary and
secondary ignition circuits? ---------CORRECT ANSWER-----------------
ignition coil
Which of the following is a cause of detonation? ---------CORRECT
ANSWER-----------------all correct
If the throttle is held wide open while the engine is cranked over by the
starter motor, the fuel management system will enter _____ mode. -----
----CORRECT ANSWER-----------------clear flood
Preliminary checks are being discussed. Technician A says to run
specific fuel injection tests first. Technician B says most driveability
concerns are caused by PCM-related problems. Who is correct? ---------
CORRECT ANSWER-----------------neither
,Fuel lines are being discussed. Technician A says when installing flexible
tubing, always use new clamps. Technician B says ordinary rubber hose
may be used to replace a kinked steel fuel line. Who is correct? ---------
CORRECT ANSWER-----------------a only
The customer complains of a loss of power at highway speeds and a
rough running engine at all speeds. A five-gas analyzer reveals these
measurements at 2,500 rpm: HC = 700 ppm, CO = 0.2%, CO2 = 9.2%, O2
= 6.2%, and NOX = 330 ppm. What is the most likely cause? ---------
CORRECT ANSWER-----------------lean misfire
A technician connects a DMM with a MIN/MAX/AVG function to the
output of an oxygen sensor. The engine is run at 2000 RPM for several
minutes. During the test, the voltage toggles rapidly between 150 and
900 millivolts. At the end of the test, the MAX voltage was .967 V, the
MIN voltage was .087 V, and the AVG voltage was .683 V. Technician A
says the sensor is faulty and should be replaced. Technician B says
there could be a vacuum leak that caused the sensor voltage to have a
higher than normal average. Who is correct? ---------CORRECT ANSWER-
----------------neither
Technician A says the biggest disadvantage of using CNG as a fuel is that
the large amount space occupied by fuel cylinders limits the driving
range of the vehicle. Technician B says bi-fuel vehicles are equipped to
, store both CNG and gasoline and will run on either. Who is correct? -----
----CORRECT ANSWER-----------------both
Each fuel injector has a _____-wire connector. ---------CORRECT
ANSWER-----------------two
If a flex fuel vehicle has half a tank of E85 onboard and the driver then
fills the tank up with regular gasoline what will happen? ---------
CORRECT ANSWER-----------------The system will automatically adjust
and run normally
Technician A says the bearings in a turbocharger are cooled by engine
oil. Technician B says turbocharger bearings are cooled by engine
coolant. Who is correct? ---------CORRECT ANSWER-----------------both
Injector cleaning is being discussed. Technician A uses a wire brush to
clean the tips of the injectors. Technician B soaks the injector in
cleaning solvent. Who is correct? ---------CORRECT ANSWER-----------------
neither
