Smog Check Inspector Level 1 Exam

Smog Check Inspector Level 1 Exam (Latest Update 2026 / 2027) | Questions and Verified Answers | Grade A | 100 % Correct

Question:

During the visual portion of an OBD II smog check inspection the smog check inspector sees an aftermarket catalytic converter installed. How should he or she proceed?

• fail the vehicle as modified under catalytic converter
• pass the vehicle because the catalytic converter is there
• research the new catalytic converter and proceed accordingly
• abort the test and refer the customer to the referee

Answer:

research the new catalytic converter and proceed accordingly

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Question:

What emission(s) does a TWC reduce?

• H/C, CO & Nitrogen
• H/C, CO & H2O
• H/C, CO & CO2
• H/C, CO & NOx

Answer:

HC, CO and NOx

Question:

What portion(s) of a smog check inspection are performed with the engine Running/Ready mode on a hybrid vehicle?

• visible smoke checks (idle tail pipe & BAR snap test)
• liquid fuel leak check
• ignition timing check
• all of the above

Answer:

liquid fuel leak check

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Question:

What emission(s) would a vehicle most likely fail for due to a lack of flow in the cooling system (radiator)?

• NOx
• H/C
• CO
• all of the above

Answer:

NOx

Question:

During a smog check inspection on a 1999 Ford F250 Diesel truck the smog check inspector sees the GVWR on the drivers door label as 14,050 lbs. How should he or she proceed?

• test the vehicle on OIS as its Diesel vehicle
• refuse the vehicle as it doesn't need to be tested
• test the vehicle on EIS as it's a Diesel vehicle
• refer the customer to the dealership for testing

Answer:

refuse the vehicle as it doesnt need to be tested

• / 3