A1 ASE Test 2025/2026 Exam Questions
and Detailed Answers | Get it 100%
Correct Answers
If an engine experiences a sharp, metallic rapping noise only when it is
idling, the trouble could be worn:
`Main bearings
`Piston pins
`connecting rod bearings
`piston skirts - 🧠 ANSWER ✔✔Piston pins
On a port fuel-injected engine, the cause of excessive black smoke in the
exhaust could be:
`low fuel pressure
`an intake manifold vacuum leak
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
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,`high oxygen sensor voltage
`high fuel pressure - 🧠 ANSWER ✔✔High fuel pressure
During a cylinder power balance test on a four-cylinder port fuel-injected
engine, one cylinder has a 75-rpm drop and the other cylinders have a 125-
rpm drop. Technician A says that the cylinder with a 75-rpm drop may have
a burned exhaust valve. Technician B says that the cylinder with the 75-
rpm drop may have a bad fuel injector. Who is correct?
A only
B only
Both A and B
Neither A nor B - 🧠 ANSWER ✔✔Both A and B
While discussing cylinder head service, Technician A says that torque-to-
yield bolts may be reused if they are not damaged. Technician B says that
torque-to-yield bolts are usually tightened to a specific torque and then
rotated a certain number of degrees. Who is correct?
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, A only
B only
Both A and B
Neither A nor B - 🧠 ANSWER ✔✔B only
The cause of excessive valve stem height could be:
`An improperly installed valve guide
`excessive material machined from the head surface
`a worn valve guide and stem
`excessive material removed from the valve seat - 🧠 ANSWER
✔✔excessive material removed from the valve seat
While diagnosing an engines timing belt condition, Technician A says that
some vehicle manufacturers recommend checking timing belt wear by
measuring the installed length of the belt tensioner. Technician B says that
on some engines the valves will strike the top of the pistons if the timing
belt jump breaks. Who is correct?
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
and Detailed Answers | Get it 100%
Correct Answers
If an engine experiences a sharp, metallic rapping noise only when it is
idling, the trouble could be worn:
`Main bearings
`Piston pins
`connecting rod bearings
`piston skirts - 🧠 ANSWER ✔✔Piston pins
On a port fuel-injected engine, the cause of excessive black smoke in the
exhaust could be:
`low fuel pressure
`an intake manifold vacuum leak
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,`high oxygen sensor voltage
`high fuel pressure - 🧠 ANSWER ✔✔High fuel pressure
During a cylinder power balance test on a four-cylinder port fuel-injected
engine, one cylinder has a 75-rpm drop and the other cylinders have a 125-
rpm drop. Technician A says that the cylinder with a 75-rpm drop may have
a burned exhaust valve. Technician B says that the cylinder with the 75-
rpm drop may have a bad fuel injector. Who is correct?
A only
B only
Both A and B
Neither A nor B - 🧠 ANSWER ✔✔Both A and B
While discussing cylinder head service, Technician A says that torque-to-
yield bolts may be reused if they are not damaged. Technician B says that
torque-to-yield bolts are usually tightened to a specific torque and then
rotated a certain number of degrees. Who is correct?
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
, A only
B only
Both A and B
Neither A nor B - 🧠 ANSWER ✔✔B only
The cause of excessive valve stem height could be:
`An improperly installed valve guide
`excessive material machined from the head surface
`a worn valve guide and stem
`excessive material removed from the valve seat - 🧠 ANSWER
✔✔excessive material removed from the valve seat
While diagnosing an engines timing belt condition, Technician A says that
some vehicle manufacturers recommend checking timing belt wear by
measuring the installed length of the belt tensioner. Technician B says that
on some engines the valves will strike the top of the pistons if the timing
belt jump breaks. Who is correct?
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
