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Diagnosing Engine Mechanical Problems




1.What is the primary reason to keep spark plug holes free of debris?
Debris can ignite.
Debris can damage spark plug threads.
Debris can fall into the engine and cause damage.
None of the above.


2.For each 1,000 feet of altitude, how much does compression pressure drop?
1 percent.
2 percent.
3 percent.
4 percent.


3.Carbon particles loosened by removing a spark plug may lodge under a valve and cause a low compression reading.
True.
False.


4.What tool can disable individual cylinders electronically?
Engine shorting analyzer.
Scan tool.
Cylinder drain analyzer.
None of the above.


5.When isolating cylinder noise, cylinders should be disabled only briefly to prevent damage to the:
Pistons.
Valves.
Engine block.
Catalytic converter.

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