IT16 Engine Service/Electrical Review

When inspecting an engine for a possible leak, the technician notices a green liquid dripping from the front of the engine. What type of fluid is most likely leaking?

• Brake fluid

• Transmission fluid

• Coolant

• Engine oil

Two technicians are discussing engine oil leaks at the engine area. Technician A says engine oil can be brown or black. Technician B says oil dye can be useful when trying to find the location of the leak. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Which can be used to test engine coolant strength?

• Coolant refractometer

• Coolant color chart

• Coolant pressure tester

• Coolant thermocouple

When draining and refilling coolant in a vehicle, what needs to be done to ensure the coolant level is correct?

• Leave the drain plug loose as one fills the radiator.

• Drive the vehicle on the highway for 10 minutes.

• Add an extra quart of antifreeze to the overflow tank.

• Bring the engine up to operating temperature and bleed the excess air from the cooling system.

Technician A says that when replacing valve cover gaskets, the technician should make sure the mating surfaces are free from any old gasket material. Technician B says to use silicone RTV in the place of gaskets. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Technician A says that the majority of serpentine drive belt systems use a tensioner that needs to be adjusted by the technician at regular service intervals. Technician B says that a drive belt system that uses a V-type belt never needs adjusting. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Technician A says all coolant leaks will be green. Technician B says coolant leaks could be a variety of colors. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Technician A says abnormal engine noises only happen when the engine is cold. Technician B says abnormal engine noises only happen when the engine is hot. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

A customer states that there is a high-pitched squealing noise when the vehicle is first started. Technician A says to inspect the belt condition and tension, then adjust to specifications if necessary. Technician B says if a belt makes noise, it should always be replaced. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Technician A says when replacing antifreeze, one should ensure the correct type of coolant is being used. Technician B says that air in the cooling system could cause an engine to run hot. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B