Engine Repair ASE

Identify the stroke:

• Compression.

• Exhaust.

• Power.

• Intake.

The freeze protection level in a cooling system can be adjusted by:

• Changing the Antifreeze to Coolant ratio.

• Adjusting the heater temperature setting.

• Using high quality fuel.

• Using synthetic engine oil.

Answer explanation

Normal coolant to antifreeze mixture is 50%/50%. The freeze point and the boiling point can both be changed by adjusting the ratio of one to the other.

To clean a cylinder after machining and deglazing, you should:

• High pressure or hand wash with soap and water.

• Use brake cleaner.

• Wash with mineral spirits.

• Flush engine with oil.

A vehicle overheating at idle speed could be due to:

• Low A/C refrigerant.

• Low engine idle speed.

• Faulty cooling fan(s).

• An obstructed heater core.

A vehicle overheating at highway speeds could be due to:

• Failed cooling fan(s).

• A damaged fan shroud.

• Using a different brand of coolant.

• A stuck open thermostat.

What are two methods used to inspect for cracks on an engine block?

• Dye penetrant and flux capaciting.

• Magnafluxing and soapy water in a spray bottle.

• Soapy water in a spray bottle and dye penetrant.

• Dye penetrant and magnafluxing.

Oil leaks may be caused by which of the following?

• Stuck open PCV.

• Plugged PCV.

• Using synthetic oil.

• Leaking exhaust manifold gasket.

An engine oil pan with an RTV seal is leaking oil. Technician A says the oil pan must be cleaned and new sealer should be applied. Technician B says the oil pan should be replaced and a rubber gasket installed. Who is correct?

• Technician A.

• Technician B.

• Both A and B.

• Neither A nor B.

Blue smoke emitting from the exhaust tailpipe is caused by the burning of:

• Coolant.

• Engine oil.

• Fuel.

• Water.

A cylinder head with TTY bolts is being installed. Technician A says the bolts should be lubricated and reused. Technician B says the bolts should be discarded and new bolts should be installed. Who is correct?

• Technician A.

• Technician B.

• Both A and B.

• Neither A nor B.