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11-39

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

Which of the following is not a true statement about the functions of a cooling system?
a.
It provides a means of warming the passenger compartment.
b.
It removes engine heat.
c.
It keeps the engine from reaching operating temperature too quickly.
d.
It maintains a proper engine operating temperature.
 

 2. 

Typical radiator cap pressure in an automotive cooling system is ____ psi.
a.
7-10
c.
18-20
b.
12-16
d.
20-26
 

 3. 

An electric engine fan is controlled by ____.
a.
the timing belt
c.
a thermostatic switch
b.
an engine speed sensor
d.
a pressure sensor
 

 4. 

The correct coolant/antifreeze mixture for use in most vehicles is ____.
a.
pure ethylene glycol
c.
50% antifreeze/50% water
b.
25% antifreeze/75% water
d.
pure water
 

True/False
Indicate whether the statement is true or false.
 

 5. 

A block heater is often used on diesel engines to aid winter starting.
 

 6. 

One of the functions of antifreeze is to lubricate the water pump.
 

 7. 

The radiator's primary function is to store engine heat.
 

 8. 

Air cooling systems circulate fresh air through internal engine passages to carry away engine heat.
 

 9. 

A molded radiator hose fits only a specific year and make of vehicle.
 

 10. 

High thermostat heat ranges are used in modern vehicles to reduce exhaust emissions.
 

Matching
 
 
Match the following terms and identifying phrases.
a.
water pump impeller
d.
water pump bearings
b.
water pump shaft
e.
water pump hub
c.
water pump seal
f.
water pump housing
 

 11. 

Prevents coolant leakage between shaft and housing.
 

 12. 

Mounting for fan and belt pulley.
 

 13. 

Axle or spindle that transfers force from the hub to the impeller.
 

 14. 

Iron or aluminum casting that forms the main body of the pump.
 

 15. 

Anti-friction components that allow the shaft to spin freely.
 

 16. 

Disk with fan-like blades; spins to produce pressure and flow.
 

Completion
Complete each statement.
 

 17. 

Large cooling ______________________________ on the cylinder are an essential feature of air cooling systems.
 

 

 18. 

A water pump ______________________________ is installed between the pump and engine to prevent coolant leakage.
 

 

 19. 

A(n) ______________________________ is a small tank placed inside the vehicle's radiator to dissipate heat from transmission fluid.
 

 

 20. 

Pressure in the cooling system raises the boiling point of coolant to between ______________________________°F and 260°F.
 

 

 21. 

A fluid coupling fan clutch is designed to ______________________________ at higher speeds.
 

 

 22. 

The thermostat ______________________________ is the temperature at which it opens to permit coolant flow.
 

 

 23. 

Antifreeze prevents rust and ______________________________ inside the cooling system.
 

 



 
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