Diagnosing and Repairing Heating and Engine Cooling Systems



1.	What temperature should the cooling system be at before removing the pressure cap?
	A.	Room temperature.
	B.	212ºF.
	C.	32ºF.
	D.	As soon as you can comfortably remove it with a gloved hand.

2.	The only function of coolant is to keep the cooling system from freezing in cold weather.
	A.	True.
	B.	False.

3.	What does a pocket hydrometer use to indicate coolant strength?
	A.	Mercury.
	B.	Colored balls.
	C.	Digital readout.
	D.	Dial gauge.

4.	How many turns should a cold cooling fan clutch coast when spun by hand?
	A.	Four to five.
	B.	Three to four.
	C.	One and a half to two.
	D.	One.

5.	Coolant is a relatively safe fluid and can be conveniently disposed of by pouring it down the drain.
	A.	True.
	B.	False.

6.	The pressurized cooling system:
	A.	Has no effect on boiling point.
	B.	Reduces the boiling point.
	C.	Increases the boiling point.
	D.	Stores cold coolant.

7.	Why should you turn off the engine if a pressure tester gauge reading rises rapidly beyond cap ratings?
	A.	To prevent personal injury.
	B.	To prevent damage to the radiator.
	C.	To prevent damage to hoses and gaskets.
	D.	All of the above.

8.	If the radiator hoses are seized to the inlet or outlet necks, you should:
	A.	Run hot water over them.
	B.	Pry them loose with a blunt object.
	C.	Carefully slit them with a knife and peel them away from the necks.
	D.	Use pliers to twist them off.

9.	When tightening hose clamps, how much hose should be left extending beyond the clamp?
	A.	1/8" to 1/4".
	B.	1/4" to 1/2".
	C.	1/2" to 1".
	D.	1" to 2".

10.	Which of the following is true of proper ohmmeter use?
	A.	Electricity must flow through the component being tested.
	B.	The component being tested must be disconnected from the circuit.
	C.	The ohmmeter is not a multimeter function.
	D.	None of the above.

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