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SOS Mechanic Certificate -Engine Repair Exam
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SOS Mechanic Certificate -EngineRepair Exam 2024-2025
Which of the following is true about adjusting valve tappet clearance?
The valve tappet clearance should be adjusted at TDC at the end of the
compression stroke.
The hydraulic lifters are noisy on the highway but quiet at low speeds. What should
you do first when diagnosing this problem?
CHECK THE CRANKCASE OIL LEVEL.
In most engines, valve timing is controlled by:
A Belt, Chain, or Gear Drive
THE BEARING INSERTS BELOW ARE PLASTIGAGED. What can you tell
about these images?
INSERT"A" PROVIDES MORE CLEARANCE.
The compression test revealed that the middle two cylinders on one side of a V-8
engine were reading 50 PSI. THE OTHER CYLINDERS SHOWED READINGS
BETWEEN 135 AND 140 PSI. What is the most likely cause of this condition?
A blown head gasket.
EXTREMELY WORN VALVE GUIDES:
ALL OF THE FOREGOING.
INTAKE VALVE DEPOSITS, AS SHOWN BELOW:
Both B and C
, What exactly is being checked on the valve spring in the illustration below?
INSTALLED HEIGHT
A VACUUM GAUGE is connected to the intake manifold. Which of the following
is correct?
When the engine is accelerated quickly, the needle rises to a high reading.
WHAT ARE THE MINIMUM AND MAXIMUM MEASUREMENTS OF A
SHAFT FOR 2.125 PLUS OR MINIUS.015?
2.062-2.250
The mechanic has determined that when the throttle is quickly opened, no fuel
squirts into the carburetor. What Could Be Caused By:
ALL OF THE FOREGOING.
WARM ENGINES HAVE LOW OIL PRESSURE. The most likely cause of low
oil pressure is:
LEAKY MAIN BEARING SEALS.
WHAT IS THE READING FROM THE 0-1 INCH MICROMETER BELOW?
5.750" is incorrect; 1.599 is probably the correct answer.
YOU'RE REINSTALLING PISTONS WITH NEW RINGS. The ring compressor
will not fit tightly around a piston skirt, and the rings will bind on the block
surface. What should you do?
CHECK THE RING'S END GAP.
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