“Smog Inspector Level 1 Exam — Complete 2025/2026 Version
| Full Questions & Verified Answers, Practice & Explanations
(PDF)”
What you’ll learn / topics covered:
• Basic engine theory (gasoline & diesel)
• Emissions control systems (catalysts, EGR, evap, air injection)
• Diagnosing emissions failures
• OBD / readiness monitoring, codes, drive cycles
• Hybrid vehicle emissions protocols
• Safety, shop procedures, emissions calibration
• Test-taking tips & exam format insight
Smog Inspector Level 1 Exam
What model year "Gasoline Vehicles" are subject to California's Smog Check Program?
a. 1975 thru current model year
b. 1776 thru current model year
c. 1976 thru current model year
d. 1976 thru 1999 model year
1976 through current model year
What model year "Diesel Vehicles" are subject to California's Smog Check Program?
a. 2000 thru current model year
b. 1996 thru current model year
c. 1998 thru 2016 model year
d. 1998 thru current model year
1998 through current model year
A 2005 Toyota Prius Hybrid is in for a Smog Inspection because of a Change of Ownership, how should
the Smog Inspector proceed?
a. Conduct an ASM Test
b. Tell the new owner the vehicle does require a smog inspection
c. Tell the new owner to make an appointment with the referee
d. Conduct an OIS Test
Conduct an OIS Test
, When conducting a Two Speed Idle Test on a 1989 Ford Mustang, how should the Smog Inspector
Functionally test the EGR System?
a. Manually lift the EGR Pintle and listen for an RPM drop
b. Apply vacuum to the EGR and listen for an RPM drop
c. Follow the manufacturers testing procedures
d. Use a Bi-directional scan tool and listen for an RPM drop
Follow the manufacturer's testing procedure's
What emission(s) does the PCV system reduce?
a. H/C & CO2
b. H/C & CO
c. H/C & NOx
d. CO2 & CO
HC and CO
What emission(s) does an Oxidation Catalyst (OC) reduce?
a. CO & CO2
b. H/C & CO
c. Hydrogen
d. NOx
HC and CO
A Diesel Vehicle is in for a smog inspection, but fuel is seen leaking onto the ground. If the smog check
inspector feels the vehicle is safe for testing, how should he or she proceed?
a. Test the vehicle and Fail the Vehicle for the Liquid Fuel Leak
b. Test the vehicle and Pass the Vehicle regardless of the leak
c. Ignore the leak and Test the Vehicle in accordance with OIS
d. Ignore the leak and Test the Vehicle in accordance with EIS
Ignore the leak and test the vehicle in accordance with OIS
What emissions class of vehicles have an extended warranty on emissions components of 15 years
and/or 150,000 miles?
a. PKEV
b. PLEV
c. PSEV
d. PZEV
PZEV
What emission(s) does an air system (pump or pulse) reduce?
A. CO2 & H/C
b. CO & H/C
c. H/C & NOx
d. CO2 & NOx
| Full Questions & Verified Answers, Practice & Explanations
(PDF)”
What you’ll learn / topics covered:
• Basic engine theory (gasoline & diesel)
• Emissions control systems (catalysts, EGR, evap, air injection)
• Diagnosing emissions failures
• OBD / readiness monitoring, codes, drive cycles
• Hybrid vehicle emissions protocols
• Safety, shop procedures, emissions calibration
• Test-taking tips & exam format insight
Smog Inspector Level 1 Exam
What model year "Gasoline Vehicles" are subject to California's Smog Check Program?
a. 1975 thru current model year
b. 1776 thru current model year
c. 1976 thru current model year
d. 1976 thru 1999 model year
1976 through current model year
What model year "Diesel Vehicles" are subject to California's Smog Check Program?
a. 2000 thru current model year
b. 1996 thru current model year
c. 1998 thru 2016 model year
d. 1998 thru current model year
1998 through current model year
A 2005 Toyota Prius Hybrid is in for a Smog Inspection because of a Change of Ownership, how should
the Smog Inspector proceed?
a. Conduct an ASM Test
b. Tell the new owner the vehicle does require a smog inspection
c. Tell the new owner to make an appointment with the referee
d. Conduct an OIS Test
Conduct an OIS Test
, When conducting a Two Speed Idle Test on a 1989 Ford Mustang, how should the Smog Inspector
Functionally test the EGR System?
a. Manually lift the EGR Pintle and listen for an RPM drop
b. Apply vacuum to the EGR and listen for an RPM drop
c. Follow the manufacturers testing procedures
d. Use a Bi-directional scan tool and listen for an RPM drop
Follow the manufacturer's testing procedure's
What emission(s) does the PCV system reduce?
a. H/C & CO2
b. H/C & CO
c. H/C & NOx
d. CO2 & CO
HC and CO
What emission(s) does an Oxidation Catalyst (OC) reduce?
a. CO & CO2
b. H/C & CO
c. Hydrogen
d. NOx
HC and CO
A Diesel Vehicle is in for a smog inspection, but fuel is seen leaking onto the ground. If the smog check
inspector feels the vehicle is safe for testing, how should he or she proceed?
a. Test the vehicle and Fail the Vehicle for the Liquid Fuel Leak
b. Test the vehicle and Pass the Vehicle regardless of the leak
c. Ignore the leak and Test the Vehicle in accordance with OIS
d. Ignore the leak and Test the Vehicle in accordance with EIS
Ignore the leak and test the vehicle in accordance with OIS
What emissions class of vehicles have an extended warranty on emissions components of 15 years
and/or 150,000 miles?
a. PKEV
b. PLEV
c. PSEV
d. PZEV
PZEV
What emission(s) does an air system (pump or pulse) reduce?
A. CO2 & H/C
b. CO & H/C
c. H/C & NOx
d. CO2 & NOx
