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Virginia (VA) Vehicle Emissions Inspector Written
Exam | Latest Verified Questions and Detailed
Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple-choice questions is designed for the Virginia Vehicle
Emissions Inspector written exam, a certification test administered by the Virginia
Department of Environmental Quality (DEQ) under the Air Check Virginia program to
qualify individuals to perform official state emissions inspections. The exam rigorously
assesses candidates on key competencies such as the theory and operation of emissions
control systems, On-Board Diagnostics (OBDII) procedures, visual and tailpipe testing
methods, proper use of certified analyzer equipment, and the specific regulations
governing emissions inspections in Virginia.
QUESTION 1
What is the primary purpose of Virginia's vehicle emissions inspection program?
A) To improve fuel economy
B) To reduce harmful air pollutants from motor vehicles
C) To increase state revenue through fines
D) To test tire tread depth for safety
CORRECT ANSWER: B
EXPERT RATIONALE: The program is federally mandated under the Clean Air Act to
reduce ground-level ozone and smog by ensuring vehicles comply with emissions
standards.
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QUESTION 2
Which Virginia agency oversees the vehicle emissions inspection program?
A) Virginia Department of Transportation (VDOT)
B) Virginia Department of Environmental Quality (DEQ)
C) Virginia State Police
D) Virginia Department of Motor Vehicles (DMV)
CORRECT ANSWER: B
EXPERT RATIONALE: The Virginia Department of Environmental Quality (DEQ)
administers and regulates the emissions inspection program, including standards,
procedures, and enforcement.
QUESTION 3
How often must a 2010 gasoline-powered passenger car registered in Fairfax County be
emissions tested?
A) Upon initial registration, then every 2 years
B) Every year at safety inspection time
C) Only when the check engine light is on
D) At 5 years old, then annually
CORRECT ANSWER: A
EXPERT RATIONALE: For most gasoline vehicles 1996 and newer in affected areas,
testing is required biennially (every 2 years) at initial registration and then every other
year.
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QUESTION 4
Which Northern Virginia jurisdictions require emissions testing?
A) All counties in Virginia
B) Only cities with populations over 100,000
C) Arlington, Fairfax, Loudoun, Prince William, Stafford, and the cities within
D) Only the City of Richmond and Virginia Beach
CORRECT ANSWER: C
EXPERT RATIONALE: The program applies to Arlington, Fairfax, Loudoun, Prince
William, Stafford counties and the independent cities within those counties.
QUESTION 5
What is the model year cut-off for OBD II testing in Virginia?
A) 1990 and newer
B) 1996 and newer
C) 2000 and newer
D) 1985 and newer
CORRECT ANSWER: B
EXPERT RATIONALE: Vehicles from the 1996 model year and newer are generally
equipped with OBD II systems and are subject to OBD testing in Virginia.
QUESTION 6
Which gas is measured during a two-speed idle tailpipe test?
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A) Oxygen (O2) only
B) Hydrocarbons (HC) and Carbon Monoxide (CO)
C) Carbon Dioxide (CO2) only
D) Nitrous Oxide (N2O)
CORRECT ANSWER: B
EXPERT RATIONALE: The two-speed idle test measures hydrocarbons (HC) and carbon
monoxide (CO) levels at idle and 2,500 RPM; NOx is not measured during this test.
QUESTION 7
If a customer presents a vehicle with a missing fuel cap, what must the inspector do?
A) Reject the vehicle and tell the customer to purchase one
B) Complete the inspection, fail the vehicle for a missing fuel cap
C) Refer to the current fuel cap manual to verify if the vehicle requires testing
D) Fail the vehicle unless the motorist purchases a new fuel cap from the station
CORRECT ANSWER: C
EXPERT RATIONALE: Inspectors must refer to the current fuel cap manual to verify if
the vehicle is required to have the fuel cap tested and follow the appropriate procedure.
QUESTION 8
What documents must an inspector give to the motorist if a vehicle fails the emission
inspection?
A) A signed Vehicle Inspection Report (VIR) only
Virginia (VA) Vehicle Emissions Inspector Written
Exam | Latest Verified Questions and Detailed
Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple-choice questions is designed for the Virginia Vehicle
Emissions Inspector written exam, a certification test administered by the Virginia
Department of Environmental Quality (DEQ) under the Air Check Virginia program to
qualify individuals to perform official state emissions inspections. The exam rigorously
assesses candidates on key competencies such as the theory and operation of emissions
control systems, On-Board Diagnostics (OBDII) procedures, visual and tailpipe testing
methods, proper use of certified analyzer equipment, and the specific regulations
governing emissions inspections in Virginia.
QUESTION 1
What is the primary purpose of Virginia's vehicle emissions inspection program?
A) To improve fuel economy
B) To reduce harmful air pollutants from motor vehicles
C) To increase state revenue through fines
D) To test tire tread depth for safety
CORRECT ANSWER: B
EXPERT RATIONALE: The program is federally mandated under the Clean Air Act to
reduce ground-level ozone and smog by ensuring vehicles comply with emissions
standards.
,2|Page
QUESTION 2
Which Virginia agency oversees the vehicle emissions inspection program?
A) Virginia Department of Transportation (VDOT)
B) Virginia Department of Environmental Quality (DEQ)
C) Virginia State Police
D) Virginia Department of Motor Vehicles (DMV)
CORRECT ANSWER: B
EXPERT RATIONALE: The Virginia Department of Environmental Quality (DEQ)
administers and regulates the emissions inspection program, including standards,
procedures, and enforcement.
QUESTION 3
How often must a 2010 gasoline-powered passenger car registered in Fairfax County be
emissions tested?
A) Upon initial registration, then every 2 years
B) Every year at safety inspection time
C) Only when the check engine light is on
D) At 5 years old, then annually
CORRECT ANSWER: A
EXPERT RATIONALE: For most gasoline vehicles 1996 and newer in affected areas,
testing is required biennially (every 2 years) at initial registration and then every other
year.
,3|Page
QUESTION 4
Which Northern Virginia jurisdictions require emissions testing?
A) All counties in Virginia
B) Only cities with populations over 100,000
C) Arlington, Fairfax, Loudoun, Prince William, Stafford, and the cities within
D) Only the City of Richmond and Virginia Beach
CORRECT ANSWER: C
EXPERT RATIONALE: The program applies to Arlington, Fairfax, Loudoun, Prince
William, Stafford counties and the independent cities within those counties.
QUESTION 5
What is the model year cut-off for OBD II testing in Virginia?
A) 1990 and newer
B) 1996 and newer
C) 2000 and newer
D) 1985 and newer
CORRECT ANSWER: B
EXPERT RATIONALE: Vehicles from the 1996 model year and newer are generally
equipped with OBD II systems and are subject to OBD testing in Virginia.
QUESTION 6
Which gas is measured during a two-speed idle tailpipe test?
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A) Oxygen (O2) only
B) Hydrocarbons (HC) and Carbon Monoxide (CO)
C) Carbon Dioxide (CO2) only
D) Nitrous Oxide (N2O)
CORRECT ANSWER: B
EXPERT RATIONALE: The two-speed idle test measures hydrocarbons (HC) and carbon
monoxide (CO) levels at idle and 2,500 RPM; NOx is not measured during this test.
QUESTION 7
If a customer presents a vehicle with a missing fuel cap, what must the inspector do?
A) Reject the vehicle and tell the customer to purchase one
B) Complete the inspection, fail the vehicle for a missing fuel cap
C) Refer to the current fuel cap manual to verify if the vehicle requires testing
D) Fail the vehicle unless the motorist purchases a new fuel cap from the station
CORRECT ANSWER: C
EXPERT RATIONALE: Inspectors must refer to the current fuel cap manual to verify if
the vehicle is required to have the fuel cap tested and follow the appropriate procedure.
QUESTION 8
What documents must an inspector give to the motorist if a vehicle fails the emission
inspection?
A) A signed Vehicle Inspection Report (VIR) only
