SOS Mechanic Certificate -Engine Repair Exam Questions and Answers (Solved Papers)
WHICH OF THE FOLLOWING IS TRUE ABOUT ADJUSTING VALVE
TAPPET CLEARANCE - Correct Answers ✅VALVE TAPPET
CLEARANCE SHOULD BE ADJUSTED AT TDC AT THE END OF
THE COMPRESSION STROKE.
THE HYDRAULIC LIFTERS ARE NOISY AT HIGHWAY SPEEDS
BUT QUIET AT LOW SPEEDS. WHAT SHOULD YOU DO FIRST AS
YOU DIAGNOSE THIS PROBLEM? - Correct Answers
✅CHECK CRANKCASE OIL LEVEL.
THE VALVE TIMING ON MOST ENGINES IS CONTROLLED BY: -
Correct Answers ✅A BELT, CHAIN OR GEAR DRIVE
THE BEARING INSERTS BELOW HAVE BEEN PLASTIGAGED.
WHAT CAN YOU DETERMINE ABOUT THESE PICTURES? -
Correct Answers ✅INSERT"A" HAS MORE CLEARANCE.
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? - Correct Answers ✅A BLOWN HEAD
GASKET.
EXCESSIVELY WORN VALVE GUIDES: - Correct Answers
✅ALL OF THE ABOVE. 1 / 2
SOS Mechanic Certificate -Engine Repair Exam Questions and Answers (Solved Papers)
INTAKE VALVE DEPOSITS, AS SHOWN BELOW: - Correct
Answers ✅BOTH B AND C
WHAT IS BEING CHECKED ON THE VALVE SPRING IN THE
ILLUSTRATION BELOW? - Correct Answers ✅INSTALLED
HEIGHT
YOU ARE USING A VACUUM GAUGE CONNECTED TO THE
INTAKE MANIFOLD. WHICH OF THE FOLLOWING IS TRUE? -
Correct Answers ✅WHEN THE ENGINE IS RAPIDLY
ACCELERATED, THE NEEDLE WILL RISE TO A HIGH READING.
WHAT ARE THE MINIMUM AND MAXIMUM MEASUREMENTS OF
A SHAFT GIVEN 2.125 PLUS OR MINIUS .015? - Correct Answers ✅2.062-2.250
THE MECHANIC HAS DETERMINED THAT NO FUEL SQUIRTS
INTO THE CARBURETOT WHEN THE THROTTLE IS OPENED
QUICKLY. WHAT COULD BE CAUSED BY: - Correct Answers
✅ALL OF THE ABOVE.
A WARM ENGINE HAS LOW OIL PRESSURE. THE MOST LIKELY
CAUSE OF THE LOW OIL PRESSURE IS: - Correct Answers
✅LEAKY MAIN BEARING SEALS
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