SMOG CHECK INSPECTOR LEVEL 1 | 2025
UPDATE MOST TESTED QUESTIONS WITH
VERIFIED ANSWERS GRADEDA+ | ASSURED
SUCCESS
1. A technician is conducting a functional Ignition Timing test. The under-hood
label specifies timing at 12°BTDC. Which of the following statements applies
to this vehicle's ignition timing test?
The timing must be within +/- 5° from OEM specifications
The ignition timing must match the OEM specifications exactly
The timing must be within +/- 3° degrees from OEM specifications
The timing can be advanced by up to 3°
2. Why is it important for a smog check inspector to classify a vehicle as a
California vehicle when emissions equipment is identical?
The inspector can choose any classification based on personal
preference.
California has stricter emissions regulations, so classifying it
correctly ensures compliance.
Federal regulations are more lenient, so it should be classified as
federal.
It does not matter how the vehicle is classified as long as it passes
the inspection.
3. Describe the frequency and timing of smog check inspector license
,renewals.
A smog check inspector license must be renewed every other year
on the last day of the inspector's birth month.
A smog check inspector license does not require renewal.
, A smog check inspector license is valid for five years from the date
of issue.
A smog check inspector license is renewed annually on January 1st.
4. If a hybrid vehicle fails the liquid fuel leak check during a smog inspection,
what should be the next step for the vehicle owner?
Address the fuel leak issue and retest the vehicle.
Only check the tire pressure before retesting.
Replace the engine entirely before retesting.
Ignore the results and continue driving the vehicle.
5. Two-way catalytic converter (Oxidation CAT) reduces what pollutants?
NOx &CO
CO & HC
NOX & CO
HC & NOx
6. Describe the role of the PCV system in reducing vehicle emissions.
The PCV system filters out particulate matter from the exhaust
before it exits the vehicle.
The PCV system increases the amount of fuel injected into the
engine to improve combustion efficiency.
The PCV system helps reduce harmful hydrocarbons and carbon
monoxide by recirculating gases from the crankcase back into the
intake manifold for combustion.
, The PCV system is responsible for controlling the air-fuel mixture in
the combustion chamber.
7. What is the smog inspection requirement for a 1975 Ford Mustang in
California?
Visual inspection only
Full emissions test
No test is required
OBD II test
8. If a PZEV vehicle experiences a failure in its emissions component after 10
years and 120,000 miles, what warranty coverage applies?
The emissions component is covered only if the vehicle has been
regularly serviced.
The emissions component is not covered as it exceeds the mileage
limit.
The emissions component is not covered as it exceeds the age limit.
The emissions component is covered under the extended
warranty.
9. During which stroke of an internal combustion engine does the ignition
typically fire?
Intake stroke
Exhaust stroke
Compression stroke
Power stroke
UPDATE MOST TESTED QUESTIONS WITH
VERIFIED ANSWERS GRADEDA+ | ASSURED
SUCCESS
1. A technician is conducting a functional Ignition Timing test. The under-hood
label specifies timing at 12°BTDC. Which of the following statements applies
to this vehicle's ignition timing test?
The timing must be within +/- 5° from OEM specifications
The ignition timing must match the OEM specifications exactly
The timing must be within +/- 3° degrees from OEM specifications
The timing can be advanced by up to 3°
2. Why is it important for a smog check inspector to classify a vehicle as a
California vehicle when emissions equipment is identical?
The inspector can choose any classification based on personal
preference.
California has stricter emissions regulations, so classifying it
correctly ensures compliance.
Federal regulations are more lenient, so it should be classified as
federal.
It does not matter how the vehicle is classified as long as it passes
the inspection.
3. Describe the frequency and timing of smog check inspector license
,renewals.
A smog check inspector license must be renewed every other year
on the last day of the inspector's birth month.
A smog check inspector license does not require renewal.
, A smog check inspector license is valid for five years from the date
of issue.
A smog check inspector license is renewed annually on January 1st.
4. If a hybrid vehicle fails the liquid fuel leak check during a smog inspection,
what should be the next step for the vehicle owner?
Address the fuel leak issue and retest the vehicle.
Only check the tire pressure before retesting.
Replace the engine entirely before retesting.
Ignore the results and continue driving the vehicle.
5. Two-way catalytic converter (Oxidation CAT) reduces what pollutants?
NOx &CO
CO & HC
NOX & CO
HC & NOx
6. Describe the role of the PCV system in reducing vehicle emissions.
The PCV system filters out particulate matter from the exhaust
before it exits the vehicle.
The PCV system increases the amount of fuel injected into the
engine to improve combustion efficiency.
The PCV system helps reduce harmful hydrocarbons and carbon
monoxide by recirculating gases from the crankcase back into the
intake manifold for combustion.
, The PCV system is responsible for controlling the air-fuel mixture in
the combustion chamber.
7. What is the smog inspection requirement for a 1975 Ford Mustang in
California?
Visual inspection only
Full emissions test
No test is required
OBD II test
8. If a PZEV vehicle experiences a failure in its emissions component after 10
years and 120,000 miles, what warranty coverage applies?
The emissions component is covered only if the vehicle has been
regularly serviced.
The emissions component is not covered as it exceeds the mileage
limit.
The emissions component is not covered as it exceeds the age limit.
The emissions component is covered under the extended
warranty.
9. During which stroke of an internal combustion engine does the ignition
typically fire?
Intake stroke
Exhaust stroke
Compression stroke
Power stroke
