ENGINE REPAIR MICHIGAN MECHANIC EXAM
ACTUAL TEST QUESTIONS AND CORRECT
ANSWERS
◉ THE HYDRAULIC LIFTERS ARE NOISY AT HIGHWAY SPEEDS BUT
QUIET AT LOW SPEEDS. WHAT SHOULD YOU DO FIRST AS YOU
DIAGNOSE THIS PROBLEM.
Answer: A. CHECK LIFTER LEAKDOWN RATE.
B. CHECK CRANKCASE OIL LEVEL. (CORRECT AWNSER)
C. CHECK LIFTER CLEARANCE HOT. (NOT CORRECT AWNSER)
D. CHECK LIFTER CLEARANCE COLD.
◉ THE VALVE TIMING ON MOST ENGINES IS CONTROLLED BY:.
Answer: A. AN ON BOARD COMPUTER. (NOT CORRECT AWNSER)
B. A CENTRIFUGAL ADVANCE UNIT.
C. A VACUUM ADVANCE UNIT
D. A BELT, CHAIN OR GEAR DRIVE. (CORRECT AWNSER)
◉ THE BEARING INSERTS BELOW HAVE BEEN PLASTIGAGED.
WHAT CAN YOU DETERMINE ABOUT THESE PICTURES?.
Answer: A. BOTH BEARING JOURNALS ARE OUT OF ROUND. (NOT
CORRECT AWNSER)
,B. INSERT "B" HAS MORE CLEARANCE.
C. INSERT"A" HAS MORE CLEARANCE.
D. BOTH BEARINGS HAVE EXCESSIVE TAPER.
◉ THE COMPRESSION TEST HAS SHOWED THAT THE MIDDLE TWO
CYLINDERS ON ONE SIDE OF A V-8 ENGINE HAD READINGS OF 50
PSI. THE OTHER CYLINDERS HAD READINGS BETWEEN 135 PSI
AND 140 PSI. WHAT IS THE LIKELY CAUSE OF THIS CONDITION?.
Answer: A. A BURNED EXHAUST VALVE
B. A BLOWN INTAKE MANIFOLD GASKET.
C. A BLOWN HEAD GASKET. (CORRECT AWNSER)
D. A BURNED INTAKE VALVE. (NOT CORRECT AWNSER)
◉ EXCESSIVELY WORN VALVE GUIDES:.
Answer: A. MAY BE REPLACED IF REMOVABLE.
B. MAY BE REAMED TO OVERSIZE.
C. MAY CAUSE OIL CONSUMPTION.
D. ALL OF THE ABOVE. (CORRECT AWNSER)
◉ INTAKE VALVE DEPOSITS, AS SHOWN BELOW:.
Answer: A. WILL NOT AFFECT ENGINE PERFORMANCE.
B. CAN REDUCE VOLUMETRIC EFFICIENCY AND AFFECT HIGH RPM
PERFORMANCE.
, C. CAN CAUSE DRIVEABILITY PROBLEMS DURING COLD ENGINE
OPERATION.
D. BOTH B AND C. (CORRECT AWNSER)
◉ WHAT IS BEING CHECKED ON THE VALVE SPRING IN THE
ILLUSTRATION BELOW?.
Answer: A. INSTALLED HEIGHT (CORRECT AWNSER)
B. SQUARENESS
C. COIL TAPER
D. TENSION (NOT CORRECT AWNSER)
◉ YOU ARE USING A VACUUM GAUGE CONNECTED TO THE INTAKE
MANIFOLD. WHICH OF THE FOLLOWING IS TRUE?.
Answer: A. WHEN THE ENGINE IS RAPIDLY ACCELERATED, THE
NEEDLE WILL RISE TO A HIGH READING. (POSSIBLE CORRECT
AWNSER)
B. WHEN THE THROTLE IS RELEASED SUDDENLY FROM 2500 RPM,
THE NEEDLE WILL SNAP TO A HIGHER THAN NORMAL READING
FOR AN INSTANT.
C. A "NORMAL" GAUGE READING AT IDLE WOULD BE 7-10 INCHES.
D. ALL OF THE ABOVE. (NOT CORRECT AWNSER)
◉ WHAT ARE THE MINIMUM AND MAXIMUM MEASUREMENTS OF
A SHAFT GIVEN 2.125 PLUS OR MINIUS .015?.
ACTUAL TEST QUESTIONS AND CORRECT
ANSWERS
◉ THE HYDRAULIC LIFTERS ARE NOISY AT HIGHWAY SPEEDS BUT
QUIET AT LOW SPEEDS. WHAT SHOULD YOU DO FIRST AS YOU
DIAGNOSE THIS PROBLEM.
Answer: A. CHECK LIFTER LEAKDOWN RATE.
B. CHECK CRANKCASE OIL LEVEL. (CORRECT AWNSER)
C. CHECK LIFTER CLEARANCE HOT. (NOT CORRECT AWNSER)
D. CHECK LIFTER CLEARANCE COLD.
◉ THE VALVE TIMING ON MOST ENGINES IS CONTROLLED BY:.
Answer: A. AN ON BOARD COMPUTER. (NOT CORRECT AWNSER)
B. A CENTRIFUGAL ADVANCE UNIT.
C. A VACUUM ADVANCE UNIT
D. A BELT, CHAIN OR GEAR DRIVE. (CORRECT AWNSER)
◉ THE BEARING INSERTS BELOW HAVE BEEN PLASTIGAGED.
WHAT CAN YOU DETERMINE ABOUT THESE PICTURES?.
Answer: A. BOTH BEARING JOURNALS ARE OUT OF ROUND. (NOT
CORRECT AWNSER)
,B. INSERT "B" HAS MORE CLEARANCE.
C. INSERT"A" HAS MORE CLEARANCE.
D. BOTH BEARINGS HAVE EXCESSIVE TAPER.
◉ THE COMPRESSION TEST HAS SHOWED THAT THE MIDDLE TWO
CYLINDERS ON ONE SIDE OF A V-8 ENGINE HAD READINGS OF 50
PSI. THE OTHER CYLINDERS HAD READINGS BETWEEN 135 PSI
AND 140 PSI. WHAT IS THE LIKELY CAUSE OF THIS CONDITION?.
Answer: A. A BURNED EXHAUST VALVE
B. A BLOWN INTAKE MANIFOLD GASKET.
C. A BLOWN HEAD GASKET. (CORRECT AWNSER)
D. A BURNED INTAKE VALVE. (NOT CORRECT AWNSER)
◉ EXCESSIVELY WORN VALVE GUIDES:.
Answer: A. MAY BE REPLACED IF REMOVABLE.
B. MAY BE REAMED TO OVERSIZE.
C. MAY CAUSE OIL CONSUMPTION.
D. ALL OF THE ABOVE. (CORRECT AWNSER)
◉ INTAKE VALVE DEPOSITS, AS SHOWN BELOW:.
Answer: A. WILL NOT AFFECT ENGINE PERFORMANCE.
B. CAN REDUCE VOLUMETRIC EFFICIENCY AND AFFECT HIGH RPM
PERFORMANCE.
, C. CAN CAUSE DRIVEABILITY PROBLEMS DURING COLD ENGINE
OPERATION.
D. BOTH B AND C. (CORRECT AWNSER)
◉ WHAT IS BEING CHECKED ON THE VALVE SPRING IN THE
ILLUSTRATION BELOW?.
Answer: A. INSTALLED HEIGHT (CORRECT AWNSER)
B. SQUARENESS
C. COIL TAPER
D. TENSION (NOT CORRECT AWNSER)
◉ YOU ARE USING A VACUUM GAUGE CONNECTED TO THE INTAKE
MANIFOLD. WHICH OF THE FOLLOWING IS TRUE?.
Answer: A. WHEN THE ENGINE IS RAPIDLY ACCELERATED, THE
NEEDLE WILL RISE TO A HIGH READING. (POSSIBLE CORRECT
AWNSER)
B. WHEN THE THROTLE IS RELEASED SUDDENLY FROM 2500 RPM,
THE NEEDLE WILL SNAP TO A HIGHER THAN NORMAL READING
FOR AN INSTANT.
C. A "NORMAL" GAUGE READING AT IDLE WOULD BE 7-10 INCHES.
D. ALL OF THE ABOVE. (NOT CORRECT AWNSER)
◉ WHAT ARE THE MINIMUM AND MAXIMUM MEASUREMENTS OF
A SHAFT GIVEN 2.125 PLUS OR MINIUS .015?.
