SOS MECHANIC CERTIFICATE -ENGINE
REPAIR EXAM | COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS | LATEST
UPDATE (2026) | ALREADY GRADED A+
Which of the following is true about adjusting valve tappet clearance
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?
Check crankcase oil level.
The valve timing on most engines is controlled by:
A belt, chain or gear drive
The bearing inserts below have been plastigaged. What can you determine about
these pictures?
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?
A blown head gasket.
Excessively worn valve guides:
All of the above.
Intake valve deposits, as shown below:
Both b and c
What is being checked on the valve spring in the illustration below?
Installed height
, You are using a vacuum gauge connected to the intake manifold. Which of the
following is true?
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?
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:
All of the above.
A warm engine has low oil pressure. The most likely cause of the low oil pressure
is:
Leaky main bearing seals
What is the reading of the 0-1 inch micrometer below?
5.750" wrong 1.599 is prob right answer
You are reinstalling pistons with new rings. The ring compressor will not fit tight
around a piston skirt and the rings bind on the block surface. What should you
do?
Check the ring end gap.
You have checked the crankshaft and found thye following measurements below.
The rod journal surfaces are smooth and no rod journal taper is present. What
should you do? (use given specifications and measurements.)
Install standard bearings in all rods.
You have measured the cylinders and obtained the measurements given below. All
the cylinders are smooth and the pistons are reuseable. What should the
mechanic do?
Deglaze cylinders, use original pistons and new standard rings.
REPAIR EXAM | COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS | LATEST
UPDATE (2026) | ALREADY GRADED A+
Which of the following is true about adjusting valve tappet clearance
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?
Check crankcase oil level.
The valve timing on most engines is controlled by:
A belt, chain or gear drive
The bearing inserts below have been plastigaged. What can you determine about
these pictures?
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?
A blown head gasket.
Excessively worn valve guides:
All of the above.
Intake valve deposits, as shown below:
Both b and c
What is being checked on the valve spring in the illustration below?
Installed height
, You are using a vacuum gauge connected to the intake manifold. Which of the
following is true?
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?
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:
All of the above.
A warm engine has low oil pressure. The most likely cause of the low oil pressure
is:
Leaky main bearing seals
What is the reading of the 0-1 inch micrometer below?
5.750" wrong 1.599 is prob right answer
You are reinstalling pistons with new rings. The ring compressor will not fit tight
around a piston skirt and the rings bind on the block surface. What should you
do?
Check the ring end gap.
You have checked the crankshaft and found thye following measurements below.
The rod journal surfaces are smooth and no rod journal taper is present. What
should you do? (use given specifications and measurements.)
Install standard bearings in all rods.
You have measured the cylinders and obtained the measurements given below. All
the cylinders are smooth and the pistons are reuseable. What should the
mechanic do?
Deglaze cylinders, use original pistons and new standard rings.
