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ASE Engine Repair Practice Test
Multiple Choice
ASE Engine Repair
Multiple Choice Practice Test
Question 1 of 3
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An engine miss is being diagnosed using a cylinder leakage test. Technician Y says that any cylinder with over 20% leakage has excessive leakage. Tech Z says that air leaking from the tailpipe indicates a cracked cylinder. Which tech is correct?
A
Both Y & Z
B
Y only
C
Neither Y nor Z
D
Z only
If cylinder leakage exceeds 20%, check for air escaping the tailpipe, the PCV valve opening in the rocker arm cover, and the top of the throttle body or carburetor. Air leaking from the tailpipe usually indicates an exhaust valve leak.
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