Cooling Systems

Question 1

The cooling system must consistently and reliably?

Answer 1

Remove excess engine heat

Regulate operating temperature of engine

Question 2

Heat created by combustion is goes where?

Answer 2

1/3 - produce power
1/3 - absorbed by cooling system
1/3 - radiated by exhaust system

Question 3

Convection

Answer 3

The movement of warm gases or liquids from a hot area to a cooler area

Question 4

What are the 4 primary functions of an engine cooling system?

Answer 4

Remove excess engine heat
Regulates engine temo as required
Removes heat from components like oil coolers
Allows rapid engine warm up

Question 5

What are the 3 principles relating to heat transfer?

Answer 5

Convection
Conduction
Radiation

Question 6

T/F The boiling point of a liquid in a sealed and pressurized system can be higher than the boiling point of a liquid in a open container?

Answer 6

True

Question 7

Identify 4 advantages of an air cooled system as compared to a liquid cooled system?

Answer 7

Overall weight can be lighter
Amount of maintenance can be reduced
Total system is less complex
Coolant leaks and corrosion not a problem

Question 8

What are the 2 types of radiator designs based on coolant flow?

Answer 8

Cross-flow

Down-flow

Question 9

What is the purpose of coolant director nozzles?

Answer 9

Used to direct coolant to areas around the hot exhaust seats

Question 10

Coolant mixtures exceeding 60% anti-freeze can do what to the boiling point?

Answer 10

Lower it. as well as cause gelling

Question 11

Corrosion inhibitors are often referred to as?

Answer 11

Supplemental coolant additives (SCA’s)

Question 12

A 50/50 anti-freeze mix has a freezing point of?

Answer 12

-37C, -34F