Exam 14: Lubricating and Cooling Systems

Most oil pressure gauges are ____________________ controlled.

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 lower in the frame, improving handling. Who is correct?

What is the function of the thermostat?

Metal temperatures around the combustion chamber can run as high as ____________________ degrees Fahrenheit.

Technician A says the American Petroleum Institute has established an oil viscosity classification system. Technician B says thick viscosity oils receive high rating numbers. Who is correct?

What is the function of a fan clutch?

Two technicians are discussing a vehicle with an overheating problem. There are no leaks, internal or external. The belts are in good condition, and the radiator has been removed and flow tested. Everything appears to be in good condition. A new thermostat was installed, but it did not cure the problem. Technician A says the impeller could be slipping on the water pump shaft. Technician B says the impeller blades could be corroded. Who is correct?

Technician A says an electric cooling fan may come on at any time without warning, even if the engine is not running. Technician B says an electric cooling fan may be controlled by the engine control computer. Who is correct?

When must a thermostat be fully opened?

Water pumps are _____ type pumps.

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

A typical oil pump pickup filter screen serves to keep microscopic contaminants from reaching the oil pump.

A(n) ____________________ cooling system has an expansion tank or recovery tank.

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

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?

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

Engine oil passages are often referred to as oil ways or ____________________

Oil pressure is determined by whether the pump is a gear type or rotor type and by oil clearances, the pump's pressure regulator valve, and oil viscosity.

In most automotive applications, the water pump is driven by the ______.

What is the function of a radiator pressure cap?