A4 Steering and Suspension
A5 Brakes
A6 Electrical/Electronic Systems
A7 HVAC
A8 Engine Performance
100
All of these could cause tire wear if not within the manufacturer's specifications EXCEPT:
A. Caster
B. Tire pressure
C. Toe-in
D. Camber
A. Caster
100
A customer complains their vehicle pulls to the right when the brakes are applied. Technician A says a restricted brake line to the left caliper could cause this problem. Technician B says a malfunctioning proportioning valve is probably the cause. Who is correct?
A. Tech A only
B. Tech B only
C. Both
D. Neither
A. Only
100
Technician A says that a poor ground connection will cause increased current flow in an electrical circuit which would likely blow a fuse. Technician B says that water corrosion in the wiring will cause reduced current flow in an electrical circuit. Who is correct?
A. A only
B. Bonly
C. Both A and B
D. Neither A nor B
B. B only
100
There is little flow through the vents of a vehicle's automatic air conditioning system. Which of the following is the likely cause?
A. faulty AC clutch
B. clogged cabin air filter
C. High resistance on the blend door circuit
D. An open in the blower motor circuit
B. clogged cabin air filter
100
A +25 STFT indicates the vehicle is running
A. As it is supposed to
B. Very rich
C. Very lean
D. None of the above
C. Very lean
Positive fuel trims indicate the engine is adding more fuel to keep in stoichiometric balance
200
All of the following can cause incorrect ride height EXCEPT:
A. A broken leaf spring shackle
B. A fatigued coil spring
C. Incorrectly adjusted torsion bars
D. Worn shock absorbers
D. Worn shock absorbers
200
On a car with disc/drum brakes, the front brakes grab quickly when light pedal pressure is applied. This problem could be caused by a bad:
A. Proportioning valve
B. Pressure safety switch
C. Metering valve
D. Residual check valve
C. Metering valve
200
The engine's starter will not crank. Which of the following should be checked first?
A. Starter
B. Battery
C. Ignition switch
D. Fuse panel
B. Battery
200
An air conditioning system contains a thermal expansion valve. The suction line leading to the compressor is cool the touch. This indicates:
A. Stuck open TXV
B. Low refrigerant charge
C. Stuck closed TXV
D. Normal operation
D. Normal operation
300
Technician A says caster is not a tire-wearing angle. Tech B says that toe-in or toe-out will cause tire wear. Who is right?
A. Tech A only
B. Tech B only
C. Both
D. Neither
C. Both
300
All of the following could cause a hard brake pedal on a vehicle with power brakes EXCEPT:
A. An engine with the valves adjusted too tight
B. Brake fluid on the linings
C. A leak in the brake hydraulic system
D. A frozen or stuck caliper
C. A leak in the brake hydraulic system
300
The right-side backup light in the diagram above is dim. The other light is normal. Which of the following is causing this condition?
A: Resistance at point A
B: An open at point B
C: An open at point C
D: Resistance at point D
D. Resistance at point D
300
All of these are true about an accumulator EXCEPT:
A. It is located on the low side of the system.
B. It prevents excess liquid from entering the compressor
C. It contains a desiccant capable of absorbing moisture from the refrigerant
D. The accumulator is located between the condenser and the evaporator
D. The accumulator is located between the condenser and the evaporator
400
A vehicle will pull towards
A. The least positive camber and most positive toe
B. The most negative camber and most negative caster
C. The most negative toe and most positive caster
D. The most positive camber and least positive caster
D. The most positive camber and least positive caster
400
Which of the following disc brake caliper designs usually allow the brake pads to be removed without removing the caliper?
A. Fixed
B. Floating
C. Sliding
D. All of the above
A. Fixed
400
The engine's electric radiator cooling fan motor illustrated above does not operate unless commanded ON with a bidirectional scan tool. Tech A says the vehicle most likely has a faulty fan relay. Tech B says a faulty engine coolant circuit would result in this condition. Who is correct?
A. A only
B. B only
C. Both
D. Neither
B. Tech B
400
An air conditioning system contains a thermal expansion valve. The liquid line exiting the condenser is cool the touch. This indicates:
A. Restriction in evaporator
B. Low refrigerant charge
C. Restriction in condenser
D. Normal operation
C. Restriction in condenser
500
Tech A says an indirect TPMS system uses ABS wheel speed sensors to measure tire pressure. Tech B says direct TPMS system uses tire pressure sensors mounted inside the tire to measure tire pressure. Who is correct?
A. Tech A only
B. Tech B only
C. Both
D. Neither
C. Both
500
All of the following measurements can be taken with a micrometer EXCEPT:
A. Parallelism
B. Thickness
C. Runout
D. Taper
C. Runout
500
Referring to the 12 volt circuit above, the motor runs slowly when the switch is turned on. Technician A says that a faulty motor ground could cause this condition. Technician B says that faulty terminal at connector A could be the cause. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
B. B only
500
A rapidly cycling ac clutch could be caused by
A. incorrect refrigerant level
B. Faulty MAP sensor
C. Faulty negative temperature coefficient thermistor
D. Incorrect clutch clearance on compressor
A. incorrect refrigerant level
500
In a vehicle that uses a zirconium dioxide O2 sensor to control fuel trims, a failed ignition coil will result in the sensor
A. Reading 450 millivolt
B. Reading above 450 millivolt
C. Reading below 450 millivolt
D. The sensor will fluctuate between 100 and 900 millivolt
C. Reading below 450 millivolt
The O2 sensor ONLY sees oxygen. The unburnt O2 will present as a lean condition.
This is why modern vehicles use wide band or air fuel ratio sensors.