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Smog Check Inspector Level 1 Exam ( Update 2026 / 2027) Questions & Answers 100 % Correct
Question:
What readings for timing would pass the vehicle if the under hood label states that the timing spec is 10 degrees BTDC at 750 RPM?
Answer:
3+/- degrees and between 100 +/- RPM
Question:
An AIR system (pump style) has the ability to change where the air from the pump is delivered to. the device for routing the air is called a?
Answer:
diverter valve
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Question:
What is the proper sequence for the four stroke of the internal combustion engine
Answer:
Intake, Compression, Power and Exhaust
Question:
Of the four strokes of an internal combustion engine the ignition typically fires during the Power stroke. True or False
Answer:
False, compression stroke
Question:
During the Visual portion of a smog check inspection the smog check inspector see an aftermarket catalytic converter installed. How should he proceed
Answer:
research the new catalytic converter and proceed accordingly
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Question:
What emissions does a TWC reduce
Answer:
H/C, CO, and NOx
Question:
what portions of a smog check inspection are performed with the engine running on a hybrid vehicle
Answer:
liquid fuel leak check
Question:
what emissions would a vehicle most likely fail for due to a lack of flow in the cooling system (radiator)?
Answer:
NOx
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