Smog Level 1 Certification Practice Test 2026 | Most Tested
Questions & Verified Answers | Graded A+
1. Interpret the implications of an ignition timing specification of 12 degrees
BTDC for a vehicle with a non-adjustable timing label.
The vehicle may require a timing adjustment for optimal emissions.
The timing can be adjusted to improve performance.
The specification indicates a range of acceptable timing adjustments.
The vehicle's ignition timing is fixed at 12 degrees BTDC and should
not be altered.
2. A smog technician is conducting repairs on a vehicle that is covered by a
warranty. How should they handle the posting of hourly rates according to
the Automotive Repair Act?
They must post hourly rates in the shop.
They do not need to post hourly rates.
They should verbally inform the customer of the rates.
They must include hourly rates in the invoice.
3. If a technician discovers that a vehicle with an aftermarket fuel tank fails the
smog check, what steps should they take next?
Conduct a second inspection without documenting the aftermarket
tank.
Immediately report the vehicle to the authorities without advising the
owner.
Pass the vehicle without further action since it has an aftermarket tank.
, Follow the protocol for failed inspections and advise the owner on
necessary repairs.
4. If a vehicle fails a smog check and the repair station performs necessary
repairs under warranty, what documentation should the station provide to the
vehicle owner?
A verbal explanation of the repairs.
No documentation is necessary.
An invoice detailing the warranty repairs.
A general receipt without specifics.
5. Describe the significance of the SPCN label in the context of smog check
inspections.
The SPCN label is only required for vehicles manufactured after 2000.
The SPCN label indicates that the vehicle is specially constructed
and is necessary for proper identification during inspections.
The SPCN label is used to denote the vehicle's age and registration
status.
The SPCN label is irrelevant to smog check inspections.
6. If a customer receives a failed smog inspection and believes the results are
inaccurate, what steps should they take to address the situation effectively?
They should take their vehicle to a different mechanic without any
documentation.
They should file a lawsuit against the inspection station.
They should document the inspection details and contact the
Bureau of Automotive Repair (BAR) for assistance.
, They should wait for the next inspection cycle to see if the results
change.
7. Describe the significance of the low pressure fuel evaporative test in the
context of smog check inspections.
The low pressure fuel evaporative test assesses brake efficiency.
The low pressure fuel evaporative test ensures proper tire pressure.
The low pressure fuel evaporative test measures engine performance.
The low pressure fuel evaporative test is crucial for detecting fuel
vapor leaks that can contribute to air pollution.
8. Explain why the presence of a non-approved aftermarket air cleaner affects
the outcome of a smog check inspection.
The presence of a non-approved aftermarket air cleaner can lead to
increased emissions, which violates state regulations and results in a
failed inspection.
The technician can approve any aftermarket part as long as it looks
good.
The air cleaner does not affect emissions, so it is irrelevant to the
inspection.
The aftermarket air cleaner is always better than OEM parts for
emissions.
9. If a military person decides to register their vehicle in California after initially
opting for a military exemption, what steps must they take regarding the
smog check process?
They must submit a request for a waiver from the smog check
requirements.
, They need to register the vehicle without any smog check
documentation.
They must obtain a standard smog check certificate and ensure the
vehicle meets California emissions standards.
They can continue using the military exemption certificate without
further action.
10. If a smog technician encounters a vehicle with a malfunctioning catalytic
converter, which of the following actions should they take according to the
regulations outlined in the document?
Only inform the vehicle owner verbally without documentation.
Document the failure and recommend necessary repairs.
Proceed with the inspection without addressing the issue.
Ignore the issue if the vehicle passes other tests.
11. If a technician mistakenly conducts an ASM emissions test in first gear instead
of second gear, what potential impact could this have on the test results?
The test results may be inaccurate, potentially indicating higher
emissions than actually produced.
The test will be invalidated and require retesting.
There will be no impact on the test results.
The vehicle will automatically pass the emissions test.
12. In which section of the smog check reference guide will you find information
regarding aftermarket parts verification guidelines?
Appendix J
Appendix A
Questions & Verified Answers | Graded A+
1. Interpret the implications of an ignition timing specification of 12 degrees
BTDC for a vehicle with a non-adjustable timing label.
The vehicle may require a timing adjustment for optimal emissions.
The timing can be adjusted to improve performance.
The specification indicates a range of acceptable timing adjustments.
The vehicle's ignition timing is fixed at 12 degrees BTDC and should
not be altered.
2. A smog technician is conducting repairs on a vehicle that is covered by a
warranty. How should they handle the posting of hourly rates according to
the Automotive Repair Act?
They must post hourly rates in the shop.
They do not need to post hourly rates.
They should verbally inform the customer of the rates.
They must include hourly rates in the invoice.
3. If a technician discovers that a vehicle with an aftermarket fuel tank fails the
smog check, what steps should they take next?
Conduct a second inspection without documenting the aftermarket
tank.
Immediately report the vehicle to the authorities without advising the
owner.
Pass the vehicle without further action since it has an aftermarket tank.
, Follow the protocol for failed inspections and advise the owner on
necessary repairs.
4. If a vehicle fails a smog check and the repair station performs necessary
repairs under warranty, what documentation should the station provide to the
vehicle owner?
A verbal explanation of the repairs.
No documentation is necessary.
An invoice detailing the warranty repairs.
A general receipt without specifics.
5. Describe the significance of the SPCN label in the context of smog check
inspections.
The SPCN label is only required for vehicles manufactured after 2000.
The SPCN label indicates that the vehicle is specially constructed
and is necessary for proper identification during inspections.
The SPCN label is used to denote the vehicle's age and registration
status.
The SPCN label is irrelevant to smog check inspections.
6. If a customer receives a failed smog inspection and believes the results are
inaccurate, what steps should they take to address the situation effectively?
They should take their vehicle to a different mechanic without any
documentation.
They should file a lawsuit against the inspection station.
They should document the inspection details and contact the
Bureau of Automotive Repair (BAR) for assistance.
, They should wait for the next inspection cycle to see if the results
change.
7. Describe the significance of the low pressure fuel evaporative test in the
context of smog check inspections.
The low pressure fuel evaporative test assesses brake efficiency.
The low pressure fuel evaporative test ensures proper tire pressure.
The low pressure fuel evaporative test measures engine performance.
The low pressure fuel evaporative test is crucial for detecting fuel
vapor leaks that can contribute to air pollution.
8. Explain why the presence of a non-approved aftermarket air cleaner affects
the outcome of a smog check inspection.
The presence of a non-approved aftermarket air cleaner can lead to
increased emissions, which violates state regulations and results in a
failed inspection.
The technician can approve any aftermarket part as long as it looks
good.
The air cleaner does not affect emissions, so it is irrelevant to the
inspection.
The aftermarket air cleaner is always better than OEM parts for
emissions.
9. If a military person decides to register their vehicle in California after initially
opting for a military exemption, what steps must they take regarding the
smog check process?
They must submit a request for a waiver from the smog check
requirements.
, They need to register the vehicle without any smog check
documentation.
They must obtain a standard smog check certificate and ensure the
vehicle meets California emissions standards.
They can continue using the military exemption certificate without
further action.
10. If a smog technician encounters a vehicle with a malfunctioning catalytic
converter, which of the following actions should they take according to the
regulations outlined in the document?
Only inform the vehicle owner verbally without documentation.
Document the failure and recommend necessary repairs.
Proceed with the inspection without addressing the issue.
Ignore the issue if the vehicle passes other tests.
11. If a technician mistakenly conducts an ASM emissions test in first gear instead
of second gear, what potential impact could this have on the test results?
The test results may be inaccurate, potentially indicating higher
emissions than actually produced.
The test will be invalidated and require retesting.
There will be no impact on the test results.
The vehicle will automatically pass the emissions test.
12. In which section of the smog check reference guide will you find information
regarding aftermarket parts verification guidelines?
Appendix J
Appendix A
