Vocational Auto Final

An engine's exhaust is white gray colored. Which of the following is causing this condition?

• Oil burning in the combustion chamber.
• Excessive fuel burning in the combustion chamber.
• A rich fuel mixture.
• Coolant burning in the combustion chamber.

An automatic transmission's fluid is pink and milky. Technician A says this is caused by engine overheating. Technician B says the transmission could have been overfilled and the fluid has become aerated. Who is correct?

• Technician A
• Technician B
• Both A and B
• Neither a or b

A front wheel drive vehicle makes a clacking noise that only occurs while cornering. The technician suspects a faulty front axle. Which of these is MOST likely the cause?

• The inner CV joint.
• The outer CV joint.
• The vibration damper.
• The half shaft is bent.

The tread of a tire is worn in the center and not on the outer shoulders. Technician A says this is caused by an improper wheel alignment angle. Technician B says this is caused by over inflating the tire. Who is correct?

• Technician A
• Technician B
• Both A and B
• Neither A or B

The engine of a vehicle will start but is slow cranking. Technician A says there may be resistance in the starter circuit. Technician B says to perform a voltage drop test to test for excessive resistance in the starter circuit. Who is correct?

• Technician A
• Technician B
• Both A and B
• Neither A or B

Two technicians are discussing the evaporator's function in an automotive air conditioning system. All of these are true about the evaporator EXCEPT:

• It removes humidity from the air.
• Refrigerant flows from the bottom to the top.
• Refrigerant enters the evaporator as a liquid.
• The refrigerant changes from a vapor to a liquid as it receives heat from the cabin air.

A vehicle with power assist brakes has a hard brake pedal with little stopping power. Which of these is the MOST likely cause of this condition?

• Option 1
• The brake booster.
• The master cylinder.
• Air in the system.
• Contaminated brake fluid.

Technician A says a stuck open PCV valve will cause a lean fuel condition. Technician B says the PCV system removes blowby gases from the crankcase. Who is correct?

• Option 1
• Technician A
• Technician B
• Both A and B
• Neither A or B

A technician removes and replaces a worn lower radiator hose on a four cylinder engine. The engine overheats after replacing the hose and adding coolant. Which of these is the MOST likely cause of this condition?

• Option 1
• A faulty ECT sensor.
• A stuck open thermostat.
• An air pocket in the system.
• Electrolysis.

Engine mounts were recently replaced on a front wheel drive vehicle with independent suspension. The vehicle now has a steady pull to the left at all speeds. Technician A says this is caused by loose motor mounts. Technician B says this is caused by a misaligned engine cradle. Who is correct?

• Option 1
• Technician A
• Technician B
• Both A and B
• Neither A or B