Exam (elaborations)
ASE A1 - PRACTICE TEST (SECTION A) QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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ASE A1 - PRACTICE TEST (SECTION A) QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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ASE A1 - PRACTICE TEST (SECTION A)QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
1. an engine miss is being diagnosed using a cylinder leakage test. Technician A says that any cylinder
with over 20% leakage has excessive leakage. Tech B says that air leaking from the tailpipe indicates a
cracked cylinder.
A only
B only
Both A & B
Neither A nor B - ANSWER A 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
23. during a compression test, a cylinder has 40% of the specified compression reading. When the tech
performs a wet test, the compression reading on this cylinder has 75% of the specified reading. The
cause of the low compression reading could be
worn piston rings
a burned exhaust valve
a bent intake valve
a worn camshaft lobe - ANSWER worn piston rings
if compression increases during a wet test, this indicates worn piston rings. Compression would not
increase if an exhaust valve is burned, intake valve is bent, or camshaft lobe is worn.
35. the customer complains that the engine cranks but does not start; the first thing to check should be
, valve train operation
battery voltage
compression
engine vacuum - ANSWER valve train operation
if the engine cranks properly, the battery is not the problem. Compression would not be the FIRST test,
and because engine vacuum is low during a crank, a vacuum test would not be conclusive.
40. during a cylinder balance test on an engine with fuel injection, one cylinder provides very little rpm
drop. Tech A says the ignition system may be misfiring on that cylinder. Tech B says the engine may have
an intake manifold vacuum leak.
A only
B only
Both A & B
Neither A nor B - ANSWER Both A&B
Both a misfiring ignition system and an intake manifold leak could cause a cylinder to contribute too little
power
54. while discussing basic diagnostic procedures, Tech A says the most complicated diagnostic tests
should be performed first. Tech B says that you should first question the customer to obtain as much info
as possible about the problem
A
B
A&B
Neither - ANSWER B
Always attempt the more simple diagnosis first
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