2025-2026 SERIES
TEXAS EMISSIONS INSPECTIONS EXAM COMPLETE
QUESTIONS AND CORRECT ANSWERS | GRADED
AND THE LATEST SERIES
Why are we concerned about motor vehicle pollution?
Ans: Motor vehicles emit toxic air pollutants
Motor vehicles contribute to the formation of ground level ozone
A "typical" vehicle emits a half-ton of air pollution annually
A malfunctioning vehicle emits many times the amount of pollution of a "typical"
vehicle
Question: True or False: Motor vehicles are the largest source of ground-level
ozone (or smog) in Texas.
Ans: True
Question: What is the primary purpose of OBDII?
Ans: To insure that vehicles emit the minimum amount of pollutants through their
useful life.
Question: What does the OBD II inspection do?
Ans: Monitors all components that affect vehicle emissions.
Detect and record malfunctions of the components that affect vehicle emissions.
Checks the results of the self-tests that occur while the vehicle is driven prior to the
time of inspection.
, 2025-2026 SERIES
Question: What model year and weight requirement are OBDII systems
required in gasoline powered vehicles?
Ans: 1996 or newer/8,500 pounds or less
Question: True or False: Each vehicle make requires a different Diagnostic Link
Connector, and you are responsible for ensuring your inspection station has each
tool needed for all vehicle makes.
Ans: False
Question: Where can you locate the diagnostic connector in most vehicles?
Ans: Beneath the instrument panel, near the steering column
Question: What is the name of the amber colored warning light that is
illuminated by the OBD system when a malfunction occurs?
Ans: Malfunction Indicator Light
Question: When severe misfire occurs that could damage the catalytic
converter, what does the MIL do?
Ans: Flashes on and off once per second
Question: What two checks are required of the MIL:
i. Key-On Engine Off (KOEO)
ii. Key-On Engine Running (KOER)
TEXAS EMISSIONS INSPECTIONS EXAM COMPLETE
QUESTIONS AND CORRECT ANSWERS | GRADED
AND THE LATEST SERIES
Why are we concerned about motor vehicle pollution?
Ans: Motor vehicles emit toxic air pollutants
Motor vehicles contribute to the formation of ground level ozone
A "typical" vehicle emits a half-ton of air pollution annually
A malfunctioning vehicle emits many times the amount of pollution of a "typical"
vehicle
Question: True or False: Motor vehicles are the largest source of ground-level
ozone (or smog) in Texas.
Ans: True
Question: What is the primary purpose of OBDII?
Ans: To insure that vehicles emit the minimum amount of pollutants through their
useful life.
Question: What does the OBD II inspection do?
Ans: Monitors all components that affect vehicle emissions.
Detect and record malfunctions of the components that affect vehicle emissions.
Checks the results of the self-tests that occur while the vehicle is driven prior to the
time of inspection.
, 2025-2026 SERIES
Question: What model year and weight requirement are OBDII systems
required in gasoline powered vehicles?
Ans: 1996 or newer/8,500 pounds or less
Question: True or False: Each vehicle make requires a different Diagnostic Link
Connector, and you are responsible for ensuring your inspection station has each
tool needed for all vehicle makes.
Ans: False
Question: Where can you locate the diagnostic connector in most vehicles?
Ans: Beneath the instrument panel, near the steering column
Question: What is the name of the amber colored warning light that is
illuminated by the OBD system when a malfunction occurs?
Ans: Malfunction Indicator Light
Question: When severe misfire occurs that could damage the catalytic
converter, what does the MIL do?
Ans: Flashes on and off once per second
Question: What two checks are required of the MIL:
i. Key-On Engine Off (KOEO)
ii. Key-On Engine Running (KOER)
