1. Which of the following statements about filling a coolingsystem is correct?
A. If you must add coolant to a warm engine, you should remove theradiator cap and add the coolant while the engine is off.
B. In a vehicle that has a coolant recovery system, the radiatorshould be filled to the very top with coolant.
C.In a vehicle that has a coolant recovery system, the radiatorshould be filled with coolant to about one inch below the top ofthe filler neck.
D. A coolant recovery tank should always be filled to the verytop.

2. Dirt and debris in the radiator’s cooling fins, a faultyradiator fan clutch, a thermostat that is stuck closed, or adamaged air dam are all likely to cause
A. water pump failure.
B. engine overheating.
C. coolant leaks.
D. engine overcooling.

3. Imagine that you are troubleshooting a cooling system. Theheater in the passenger compartment is producing very little heat,but the coolant level in the engine appears to be okay. When youstart the engine, coolant starts flowing immediately. The probablecause of this problem is
A. a thermostat stuck open.
B. a coolant leak into the lubrication system.
C. a thermostat stuck closed.
D. a coolant leak into a combustion chamber.

4. If a water pump’s ____ is worn, the pump shaft has too much freeplay, and the pump makes a loud whining noise as it operates.
A. seal
B. impeller
C. drive belt
D. bearing

5. Which of the following statements about water pump drive beltsis correct?
A. The tension in a serpentine belt must be adjusted regularly.
B. In a serpentine drive belt system, the belt tension is usuallymaintained by a sprinq-loaded idler pulley.
lC. If a water pump is driven by an engine’s timing belt, adrive-belt pulley keeps the belt at the proper tension.
D. If a water pump is driven off the crankshaft by V-type belts,the belt tension never needs to be adjusted.

6. Look at Figure A-1. What is the automotive technician in thisillustration doing?
A. Checking the operation of a thermostat
B. Pressure testing a radiator core
C. Checking for coolant leaks in an engine
D. Pressure testing a radiator cap

7. Which of the following components is opened to drain the coolantfrom an engine block during servicing?
A. Petcock
B. Filler neck
C. Block drain plug
D. Blow-off valve

8. Imagine that you are observing an automotive technician performa test on a cooling system. As you watch, the technician installs apressure tester at the filler neck of the vehicle’s radiator. Then,he starts the engine and watches the pressure gage on the tester.As the engine runs, the pressure reading begins to rise. What ISthe probable cause of this test result?
A. Coolant is leaking into the lubrication system.
B. The radiator pressure cap is faulty.
C. The technician performed the pressure test incorrectly.
D. Combustion gases are leaking into the cooling system.

9. The center section of a radiator where the actual cooling takesplace is called the ___
A. core
B. recovery tank
C. filler neck
D. pressure cap

10. If the oil in an engine’s lubrication system appears milkywhite or light tan in color, what is the likely cause of thiscondition?
A. The engine is constantly overheating.
B. Coolant is leaking into the lubrication system.
C. The water pump bearings are worn.
D. Too much antifreeze was added to the coolant mixture in theengine.

11. In an overhead-camshaft engine, the_____ often drives the waterpump as well as the camshafts in the cylinder head.
A. timing belt
B. transmission
C. battery
D. radiator fan motor

12. Imagine that you are checking an engine’s cooling system. Whenyou check the coolant level, you find that the level is very low.After performing a complete visual examination of the coolingsystem, you can’t see any leaks. You then perform a pressure teston the cooling system, but still cannot locate any externalcoolant
leaks. You examine a sample of oil from the engine, but the oildoes not appear to be contaminated. Next, you remove the sparkplugs from the engine and examine them. One spark plug appears tobe extremely clean.
Which of the following is the probable cause of the low coolantlevel?
A. Coolant is leaking into the combustion chamber.
B. The water pump seal has failed.
C. Coolant is leaking into the lubrication system.
D. A radiator hose has ruptured.

13. Which of the following statements about air-cooled engines iscorrect?
A. In air-cooled engines, the cylinders and cylinder heads arefinned to decrease their overall surface area.
B. A typical liquid-cooled engine has better gas mileage and a moreefficient emission system than an
equivalent air-cooled engine.
C. Air-cooled engines provide poor passenger compartment heating,tend to be noisy, and tend to develop oil leaks.
D. Air-cooled engines must be maintained periodically.

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