Auto Engine Repair (SOS Michigan Test
Prep Valve Train) Exam 2025 With 100%
Correct Answers
What is enclosed in the vehicle vin? - correct answers ✔✔Engine type, body style, and transmission
type.
A compression test shows that one cylinder shows to much leakage. During the air test could be heard
coming from the tailpipe what could be the cause?
A) bad piston rings
B) bad head gasket
C) bad exhaust gasket
D) exhaust valve not seating - correct answers ✔✔D.) exhaust valve not seating
Technician A says that main bearing oil clearances can be checked with plasty gages.
Technician B says that main bearing oil clearances can be checked with a feeler gauge. Who is Correct? -
correct answers ✔✔Tech A
An engine is burning to much oil. Technician A says its the valve guides. Technician B says its tapered
cylinder walls. Who is correct? - correct answers ✔✔Both
A compression test is being done on an in- line four cylinder engine. Cylinder two and three have
readings of 10 psi cylinder one has a reading of 140 psi and cylinder four has 145psi.
Technician A says its a blown head gasket
Technician B says its bad valve timing. - correct answers ✔✔Tech A
What is the most likely cause of low fuel pressure in a fuel injection engine?
A) clogged fuel filter
B) clogged injector
, C) restricted fuel line
D) stuck closed pressure regulator - correct answers ✔✔A) clogged fuel filter
The pressure and volume of a mechanical fuel pump are both below spec.
Technician A says that an air leak in the fuel line between the tank and the pump could be the cause.
Technician B says that a plugged fuel tank pick-up filter is the cause. - correct answers ✔✔Both
The most likely cause of a bent push rod? - correct answers ✔✔Excessive valve guide clearance
Technician A says that it is important to drive the customers vehicle to verify the complaint as part of
your diagnosis procedure.
Technician B says its a good idea to check for related TSB's - correct answers ✔✔Both
Technician A says the main bearing clearances can be checked with plasty gauges.
Technician B says that you can check main bearing clearances with a feeler gauge. Who is correct? -
correct answers ✔✔Tech A
The oil filter on a customer's car is bulged out.
Technician A says this could be caused by an improper filter installation.
Technician B says this can only be caused by a pressure regulator that is stuck. Who is correct? - correct
answers ✔✔Tech B
Technician A says that a turbocharger boost is controlled by a wastegate.
Technician B says the wastegate is controlled by the engine vacuum.
Who is correct? - correct answers ✔✔Both
NATEF certifies automotive:
A) dealerships
B) independent garages
C) technicians
Prep Valve Train) Exam 2025 With 100%
Correct Answers
What is enclosed in the vehicle vin? - correct answers ✔✔Engine type, body style, and transmission
type.
A compression test shows that one cylinder shows to much leakage. During the air test could be heard
coming from the tailpipe what could be the cause?
A) bad piston rings
B) bad head gasket
C) bad exhaust gasket
D) exhaust valve not seating - correct answers ✔✔D.) exhaust valve not seating
Technician A says that main bearing oil clearances can be checked with plasty gages.
Technician B says that main bearing oil clearances can be checked with a feeler gauge. Who is Correct? -
correct answers ✔✔Tech A
An engine is burning to much oil. Technician A says its the valve guides. Technician B says its tapered
cylinder walls. Who is correct? - correct answers ✔✔Both
A compression test is being done on an in- line four cylinder engine. Cylinder two and three have
readings of 10 psi cylinder one has a reading of 140 psi and cylinder four has 145psi.
Technician A says its a blown head gasket
Technician B says its bad valve timing. - correct answers ✔✔Tech A
What is the most likely cause of low fuel pressure in a fuel injection engine?
A) clogged fuel filter
B) clogged injector
, C) restricted fuel line
D) stuck closed pressure regulator - correct answers ✔✔A) clogged fuel filter
The pressure and volume of a mechanical fuel pump are both below spec.
Technician A says that an air leak in the fuel line between the tank and the pump could be the cause.
Technician B says that a plugged fuel tank pick-up filter is the cause. - correct answers ✔✔Both
The most likely cause of a bent push rod? - correct answers ✔✔Excessive valve guide clearance
Technician A says that it is important to drive the customers vehicle to verify the complaint as part of
your diagnosis procedure.
Technician B says its a good idea to check for related TSB's - correct answers ✔✔Both
Technician A says the main bearing clearances can be checked with plasty gauges.
Technician B says that you can check main bearing clearances with a feeler gauge. Who is correct? -
correct answers ✔✔Tech A
The oil filter on a customer's car is bulged out.
Technician A says this could be caused by an improper filter installation.
Technician B says this can only be caused by a pressure regulator that is stuck. Who is correct? - correct
answers ✔✔Tech B
Technician A says that a turbocharger boost is controlled by a wastegate.
Technician B says the wastegate is controlled by the engine vacuum.
Who is correct? - correct answers ✔✔Both
NATEF certifies automotive:
A) dealerships
B) independent garages
C) technicians
