Auto cooling systems

Coolant flows through the bypass passage

During engine warm -up when, the thermostat is closed ,___.

3 degrees f

For every 1 pound of pressure put on the engine coolant, the boiling point of the coolant is raised about ____ degrees Fahrenheit

Inner diameter

Hoses are sized based on there

Defective cooling fan

If the engine over heats during long periods of idling but runs normally at highway speeds, the problem is most likely____.

The engine will overheat during prolonged idling

If the fan shroud is removed from a vehicle_____..

Crankshaft

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

Two to four years

Most manufactures recommend that cooling systems should be drained,flushed,and filled every ____.

Both a and b

Sludge is being discussed. Technician A says sludge results from oxidation of oil. Technician B says a slight buildup on the underside of the oil fill cap is normal. Who is correct??

Both A and B

Technician A says a cooling system pressure tested is used to test for leaks in the radiator,hoses,water pump,thermostat,and engine assembly. Technician B say the cooling system pressure tester is used to check the operation of the relief valve in the radiator cap. Who is correct?

Both A and B

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

A only

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??

At the bottom of the radiator

The petcock valve is located ___.

50/50

The typical recommended mixture of water and anti freeze is __??

Disconnect the lower radiator hose

To drain a cooling system that does not have a petcock or drain plug in the radiator ____.

B only

Two technicians are discussing a car with a very noisy water pump. The pump makes a lot of noise but is not leaking coolant. Technician A sAys the owner can continue to drive the vehicle as long as there are no signs on coolant leakage. Technician b says the water pump must be replaced immediately. Who is correct?

Both A and B

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???

Centrifugal

Water pumps are ____ type pumps.

20 degrees f above the start to open temperature

When must a thermostat be fully opened?

1 minute

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

Lower radiator hose

Which hose typically has a spiral wire reinforcement ??

Upper radiator

Which of the following cooling system hoses is normally subjected to the roughest service life???

Digital infrared thermometer

Which of the following tools can be used to test the operation of the thermostat without removing it from the engine