Exam 14: Lubricating and Cooling Systems

Water pumps are _____ type pumps.

When must a thermostat be fully opened?

Technician A says cooling system pressure is regulated by the pressure relief valve in the water pump. Technician B says cooling system pressure is regulated by the radiator cap. Who is correct?

____________________ is a term used to describe the gases that escape the combustion chamber and enter the crankcase.

The radiator cap should be removed only when the engine is at full operating temperature.

Describe how to check a fan clutch.

When is a fan shroud required?

For every 1 pound of pressure put on engine coolant, the boiling point of the coolant is raised about _____ degrees Fahrenheit (_____ degrees Celsius).

If the engine overheats during long periods of idling but runs normally at highway speeds, the problem is most likely defective _____.

Technician A says a dry sump lubrication system eliminates the possibility of oil sloshing and possible oil starvation during hard cornering, braking, and acceleration. Technician B says a dry sump lubrication system allows the engine to be mounted higher in the frame. Who is correct?

Most hybrids require special coolants that serve to cool the engine and inverter assembly.

A ____________________ system provides a continuous flow of fresh air through the crankcase to relieve pressure and prevent the formation of corrosive contaminants in the crankcase.

The oil pressure ____________________ valve prevents excessively high system pressure from occurring as engine speed is increased.

During routine service a small amount of engine oil is found in the air cleaner housing. Technician A says the PCV valve may be clogged. Technician B says the engine could be overfilled with oil. Who is correct?

Most cooling systems use an expansion or ____________________ tank.

The typical recommended mixture of water and antifreeze is ______.

Engine oil pumps have ____________________ displacement.

When testing a radiator cap, with the rated pressure applied, the cap should hold that pressure for at least _____.

When the radiator cap is not the highest point in the cooling system, how is the trapped air in the cooling system removed?

Oil coolers are normally found on _____ vehicles.