ENGINE REPAIR EXAM SCRIPT VERIFIED
QUESTIONS WITH ACCURATE 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.
QUESTIONS WITH ACCURATE 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.
