Chapter 21 Cooling System Operation and Diagnosis
Review Questions

What is the normal operating coolant temperature?

Explain the flow of coolant through the engine and radiator.

Why is a coolant system pressurized?

What is the purpose of the coolant system bypass?

Explain the operation of the thermostatic cooling fan.

Describe how to diagnose a heater problem.

What are 10 common causes of overheating?

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented