ENGINE REPAIR MICHIGAN MECHANIC EXAM
COMPREHENSIVE QUESTIONS AND ANSWERS
GRADED A+
◉ THE HYDRAULIC LIFTERS ARE NOISY AT HIGHWAY SPEEDS BUT
QUIET AT LOW SPEEDS. WHAT SHOULD YOU DO FIRST AS YOU
DIAGNOSE THIS PROBLEM?
Answer: B. CHECK CRANKCASE OIL LEVEL. (CORRECT AWNSER)
◉ THE VALVE TIMING ON MOST ENGINES IS CONTROLLED BY:
Answer: D. A BELT, CHAIN OR GEAR DRIVE. (CORRECT AWNSER)
◉ 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: C. A BLOWN HEAD GASKET. (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: CAN REDUCE VOLUMETRIC EFFICIENCY AND AFFECT
HIGH RPM PERFORMANCE.
CAN CAUSE DRIVEABILITY PROBLEMS DURING COLD ENGINE
OPERATION.
◉ WHAT IS BEING CHECKED ON THE VALVE SPRING IN THE
ILLUSTRATION BELOW?
Answer: A. INSTALLED HEIGHT (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. (CORRECT AWNSER)
◉ WHAT ARE THE MINIMUM AND MAXIMUM MEASUREMENTS OF
A SHAFT GIVEN 2.125 PLUS OR MINIUS .015?
Answer: C. 2.110-2.140 (CORRECT AWNSER)
◉ THE MECHANIC HAS DETERMINED THAT NO FUEL SQUIRTS
INTO THE CARBURETOT WHEN THE THROTTLE IS OPENED
QUICKLY. WHAT COULD BE CAUSED BY:
COMPREHENSIVE QUESTIONS AND ANSWERS
GRADED A+
◉ THE HYDRAULIC LIFTERS ARE NOISY AT HIGHWAY SPEEDS BUT
QUIET AT LOW SPEEDS. WHAT SHOULD YOU DO FIRST AS YOU
DIAGNOSE THIS PROBLEM?
Answer: B. CHECK CRANKCASE OIL LEVEL. (CORRECT AWNSER)
◉ THE VALVE TIMING ON MOST ENGINES IS CONTROLLED BY:
Answer: D. A BELT, CHAIN OR GEAR DRIVE. (CORRECT AWNSER)
◉ 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: C. A BLOWN HEAD GASKET. (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: CAN REDUCE VOLUMETRIC EFFICIENCY AND AFFECT
HIGH RPM PERFORMANCE.
CAN CAUSE DRIVEABILITY PROBLEMS DURING COLD ENGINE
OPERATION.
◉ WHAT IS BEING CHECKED ON THE VALVE SPRING IN THE
ILLUSTRATION BELOW?
Answer: A. INSTALLED HEIGHT (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. (CORRECT AWNSER)
◉ WHAT ARE THE MINIMUM AND MAXIMUM MEASUREMENTS OF
A SHAFT GIVEN 2.125 PLUS OR MINIUS .015?
Answer: C. 2.110-2.140 (CORRECT AWNSER)
◉ THE MECHANIC HAS DETERMINED THAT NO FUEL SQUIRTS
INTO THE CARBURETOT WHEN THE THROTTLE IS OPENED
QUICKLY. WHAT COULD BE CAUSED BY:
