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Smog Check Inspector Level 1 Exam 2026/2027 | Practice Questions & Answers with Rationales | Complete Study Guide

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Prepare for the California Smog Check Inspector licensing exam with a comprehensive practice resource designed to reinforce the knowledge and skills covered in Level 1 Engine and Emission Control Training. California’s Bureau of Automotive Repair (BAR) states that Level 1 training is intended for applicants with minimal or no automotive experience and covers engine and emission-control theory, design, and operation. Topics Covered: Automotive Safety, Gasoline & Diesel Engine Theory, Engine Design & Operation, Cooling Systems, Exhaust Systems, Electrical Systems, Ignition Systems, Induction Systems, Fuel Injection Systems, Carburetion, Engine Management Systems, On-Board Diagnostics, Emission Control Systems, Emission Control Theory, Emissions Cause & Effect, Vehicle Inspection Fundamentals, Smog Check Procedures, Automotive Emissions, Diagnostic Concepts. Highlights: 2026/2027 Exam Preparation, Practice Questions & Answers, Detailed Rationales, Level 1 Training Review, Engine & Emission Control Concepts, OBD Fundamentals, Emissions Systems Review, Diagnostic Practice, Comprehensive Study Material, Quiz & Exam Preparation.

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Smog Check Inspector Level 1 Exam (Latest
Update ) Questions and
Verified Answers {Grade A} 100 % Correct

What should the technician do when a vehicle fails a smog check inspection and the

vehicles owner is convinced the technician failed his/her vehicle on purpose?

a. tell him or her to take the vehicle to another smog shop
b. tell him or her you don't care and have them leave

c. tell him or her to make an appointment with the referee
d. tell him or her for 50.00 you can test the vehicle again - correct answer Tell him or
her to make an appointment with the referee



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 - correct answer 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 - correct answer 1998 through current model year

,Smog Check Inspector Level 1 Exam (Latest
Update ) Questions and
Verified Answers {Grade A} 100 % Correct

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 - correct answer 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 - correct answer 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 - correct answer HC and CO


What emission(s) does an Oxidation Catalyst (OC) reduce?

, Smog Check Inspector Level 1 Exam (Latest
Update ) Questions and
Verified Answers {Grade A} 100 % Correct

a. CO & CO2

b. H/C & CO

c. Hydrogen
d. NOx - correct answer 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 - correct answer 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 - correct answer PZEV


What emission(s) does an air system (pump or pulse) reduce?

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