TEXAS VEHICLE EMISSIONS INSPECTOR UPDATED
ACTUAL EXAM QUESTIONS AND CORRECT CORRECT
ANSWERSS COMPLETE STUDY GUIDE.
Detail Information
Governing Agency Texas Department of Public Safety (DPS)
Regulatory Authority TCEQ (Texas Commission on Environmental Quality) establishes I/M program
Primary Law Transportation Code Chapter 548
Applicable Rules 37 TAC Chapter 23 (DPS); 30 TAC Chapter 114 (TCEQ)
Exam Format Written examination; computer-based or paper
Passing Requirement Complete required training, pass written exam, DPS certification
Endorsements S (Safety), C (Commercial), E (Emissions)
Attempts Allowed 3 opportunities to pass written exam within 30 days of training
SECTION 1: PROGRAM OVERVIEW AND AIR QUALITY
(Questions 1-20)
Question 1: Which agency administers the vehicle emissions inspection program in
Texas?
A) Texas Commission on Environmental Quality (TCEQ)
B) Texas Department of Public Safety (DPS)
,C) Texas Department of Motor Vehicles (TxDMV)
D) Environmental Protection Agency (EPA)
Correct answers: B. Texas Department of Public Safety (DPS)
Rationale: The Texas Department of Public Safety (DPS) operates the vehicle inspection
program in conjunction with TCEQ. DPS certifies inspection stations and inspectors,
while TCEQ establishes the I/M program requirements .
Question 2: Which agency is responsible for establishing the emissions inspection
and maintenance (I/M) program in Texas?
A) Texas Department of Public Safety (DPS)
B) Texas Commission on Environmental Quality (TCEQ)
C) Texas Department of Motor Vehicles (TxDMV)
D) Texas Legislature
Correct answers: B. Texas Commission on Environmental Quality (TCEQ)
Rationale: Transportation Code §548.301 requires the commission (TCEQ) to establish a
motor vehicle emissions inspection and maintenance program for vehicles as required
by federal law or the state's air quality state implementation plan .
Question 3: What is the primary purpose of the Texas vehicle emissions inspection
program?
A) To increase state revenue through inspection fees
B) To ensure vehicles meet emissions standards and protect air quality
,C) To reduce insurance costs for Texas drivers
D) To inspect vehicle safety features
Correct answers: B. To ensure vehicles meet emissions standards and protect air
quality
Rationale: The primary purpose of the vehicle emissions inspection program is to
reduce air pollution from motor vehicles. Motor vehicles emit toxic air pollutants and
contribute to the formation of ground-level ozone (smog) .
Question 4: What are the largest sources of air pollution from motor vehicles in
Texas?
A) Hydrocarbons (HC) and Nitrogen Oxides (NOx)
B) Carbon Dioxide (CO2) only
C) Particulate matter only
D) Sulfur dioxide (SO2)
Correct answers: A. Hydrocarbons (HC) and Nitrogen Oxides (NOx)
Rationale: Ozone is formed by atmospheric reaction between hydrocarbons (HC) and
oxides of nitrogen (NOx). Motor vehicles are the largest source of ground-level ozone
(smog) in Texas .
Question 5: How much air pollution does a "typical" vehicle emit annually?
A) 100 pounds
B) 1/4 ton
, C) 1/2 ton
D) 1 ton
Correct answers: C. 1/2 ton
Rationale: A "typical" vehicle emits a half ton of air pollution annually. A malfunctioning
vehicle emits many times that amount .
Question 6: What is the primary purpose of the On-Board Diagnostic (OBD II)
system?
A) To improve vehicle fuel economy
B) To ensure vehicles emit the minimum level of pollutants through their useful life
C) To monitor tire pressure
D) To control vehicle speed
Correct answers: B. To ensure vehicles emit the minimum level of pollutants
through their useful life
Rationale: OBD II systems monitor all components that affect vehicle emissions and
detect/record malfunctions, often before the motorist becomes aware of any problem .
Question 7: What is ground-level ozone (smog)?
A) A naturally occurring gas in the upper atmosphere
B) Formed by atmospheric reaction between hydrocarbons (HC) and oxides of nitrogen
(NOx)
ACTUAL EXAM QUESTIONS AND CORRECT CORRECT
ANSWERSS COMPLETE STUDY GUIDE.
Detail Information
Governing Agency Texas Department of Public Safety (DPS)
Regulatory Authority TCEQ (Texas Commission on Environmental Quality) establishes I/M program
Primary Law Transportation Code Chapter 548
Applicable Rules 37 TAC Chapter 23 (DPS); 30 TAC Chapter 114 (TCEQ)
Exam Format Written examination; computer-based or paper
Passing Requirement Complete required training, pass written exam, DPS certification
Endorsements S (Safety), C (Commercial), E (Emissions)
Attempts Allowed 3 opportunities to pass written exam within 30 days of training
SECTION 1: PROGRAM OVERVIEW AND AIR QUALITY
(Questions 1-20)
Question 1: Which agency administers the vehicle emissions inspection program in
Texas?
A) Texas Commission on Environmental Quality (TCEQ)
B) Texas Department of Public Safety (DPS)
,C) Texas Department of Motor Vehicles (TxDMV)
D) Environmental Protection Agency (EPA)
Correct answers: B. Texas Department of Public Safety (DPS)
Rationale: The Texas Department of Public Safety (DPS) operates the vehicle inspection
program in conjunction with TCEQ. DPS certifies inspection stations and inspectors,
while TCEQ establishes the I/M program requirements .
Question 2: Which agency is responsible for establishing the emissions inspection
and maintenance (I/M) program in Texas?
A) Texas Department of Public Safety (DPS)
B) Texas Commission on Environmental Quality (TCEQ)
C) Texas Department of Motor Vehicles (TxDMV)
D) Texas Legislature
Correct answers: B. Texas Commission on Environmental Quality (TCEQ)
Rationale: Transportation Code §548.301 requires the commission (TCEQ) to establish a
motor vehicle emissions inspection and maintenance program for vehicles as required
by federal law or the state's air quality state implementation plan .
Question 3: What is the primary purpose of the Texas vehicle emissions inspection
program?
A) To increase state revenue through inspection fees
B) To ensure vehicles meet emissions standards and protect air quality
,C) To reduce insurance costs for Texas drivers
D) To inspect vehicle safety features
Correct answers: B. To ensure vehicles meet emissions standards and protect air
quality
Rationale: The primary purpose of the vehicle emissions inspection program is to
reduce air pollution from motor vehicles. Motor vehicles emit toxic air pollutants and
contribute to the formation of ground-level ozone (smog) .
Question 4: What are the largest sources of air pollution from motor vehicles in
Texas?
A) Hydrocarbons (HC) and Nitrogen Oxides (NOx)
B) Carbon Dioxide (CO2) only
C) Particulate matter only
D) Sulfur dioxide (SO2)
Correct answers: A. Hydrocarbons (HC) and Nitrogen Oxides (NOx)
Rationale: Ozone is formed by atmospheric reaction between hydrocarbons (HC) and
oxides of nitrogen (NOx). Motor vehicles are the largest source of ground-level ozone
(smog) in Texas .
Question 5: How much air pollution does a "typical" vehicle emit annually?
A) 100 pounds
B) 1/4 ton
, C) 1/2 ton
D) 1 ton
Correct answers: C. 1/2 ton
Rationale: A "typical" vehicle emits a half ton of air pollution annually. A malfunctioning
vehicle emits many times that amount .
Question 6: What is the primary purpose of the On-Board Diagnostic (OBD II)
system?
A) To improve vehicle fuel economy
B) To ensure vehicles emit the minimum level of pollutants through their useful life
C) To monitor tire pressure
D) To control vehicle speed
Correct answers: B. To ensure vehicles emit the minimum level of pollutants
through their useful life
Rationale: OBD II systems monitor all components that affect vehicle emissions and
detect/record malfunctions, often before the motorist becomes aware of any problem .
Question 7: What is ground-level ozone (smog)?
A) A naturally occurring gas in the upper atmosphere
B) Formed by atmospheric reaction between hydrocarbons (HC) and oxides of nitrogen
(NOx)
