Engine Repair Quiz 3

Technician A says that when diagnosing an automotive system a logical, step-by-step approach should be developed. Technician B says improper service can cause engine mechanical problems and increased wear. Who is correct?

• Technician A only

• Technician B only

• Both Technician A and B

• Neither Technician A nor B

What must a technician first do before beginning diagnostics on any system?

• Conduct a road test

• Check for codes

• Check for TSBs

• Understand the normal operation of the system

Overheating can be caused by all of the following except:

• Blown head gasket

• Defective condenser

• Inoperative cooling fan

• Low coolant

When a temperature gauge reads hot, what should be done first?

• Allow the engine to cool

• Check the coolant level

• Replace the engine thermostat

• All of the above

Technician A says TSBs should be searched and read to familiarize yourself with a system. Technician B says that using a scan tool can provide information about stored trouble codes and control module calibration. Who is correct?

• Technician A only

• Technician B only

• Both Technician A and B

• Neither Technician A nor B

A preliminary engine inspection should include a:

• Compression Test

• Cooling system pressure check

• Starter current draw test

• Visual inspection

What tool can be used to help identify engine noise?

• A compression gauge

• A flashlight

• A stethoscope

• All of the above

Why would you be more likely to hear a rod knock when the engine warms up?

• Because the coolant

• Because the crankshaft only rotates when the engine is warm

• Because the engine oil is thinner when hot

• Because the fuel mixture is leaner

What type of knocking sound is caused by a piston rocking in a worn cylinder bore and contacting the cylinder wall?

• Connecting rod knock

• Main bearing knock

• Pin slap knock

• Piston slap

A rattle sound coming from the front of an engine is usually the result of a loose or stretched:

• Crankshaft main bearing

• Connecting rod bearing

• Flywheel

• Timing chain