Chapter 14 - Cooling Systems

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

False

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

3, 1.7

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?

A 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?

B only

The water pump on many late model engines is driven by the engine's timing belt or timing chain.

True

Used coolant cannot be poured down the drain or into a sewer and must be reclaimed or recycled.

True

Technician A says a cooling system pressure tester 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

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

coolant flows through the bypass passage

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

crankshaft

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

defective cooling fan