Pennsylvania Emissions Inspector Certification Test
2026 with a Review of 290 Real Exam Questions and
Correct Answers/ PA Emissions Exam Prep 2026-2027
Correctly Answered Questions Review
When performing an emissions inspection, the inspector must verify: - ANSWER-
A valid registration card
When a vehicle passes a PA Emissions Inspection, who is authorized to affix the
PA Emissions Inspection Certificate (emissions sticker) to the vehicle? -
ANSWER-PA Certified Emission Inspector
Two inspectors are discussing the PA Emission Inspection Program.
Inspector "A" says: "Current model year vehicles being registered for the first time
that have less than 5,000 miles on the odometer are eligible for an emission
exemption without an emission test."
Inspector "B" says: "Vehicles driven less than 5000 miles in the previous twelve
(12) months and that have been owned by the same person for at least one year are
eligible for an emission exemption without an emission test."
Who is right? - ANSWER-Both A and B
Two inspectors are discussing the PA Emission Inspection Program.
1
,Inspector "A" says: "Vehicles that fail the visual portion of the inspection should
receive a complete test before any repairs are made; however, a faulty or missing
gas cap may be replaced after receiving the customer's authorization."
Inspector "B" says: "Vehicles that pass the emission inspection will be issued a
Vehicle Inspection Report (VIR) and a PA Certificate of Emission Inspection
(emission sticker)."
Who is right? - ANSWER-Both A and B
The EPA has identified three harmful pollutants produced through inefficient
vehicle combustion and evaporation. These pollutants are: - ANSWER-HC, CO
and NOX
Inspector "A" says: "A vehicle that fails an initial emissions inspection is entitled
to one free retest until their current emission sticker expires."
Inspector "B" says: "Vehicle owners may request a retest at a facility other than the
one that performed the initial emissions test."
Who is right? - ANSWER-B only
What is the primary function of the gas cap vacuum relief valve? - ANSWER-To
allow fresh air to enter the fuel tank
If a vehicle were equipped with an Exhaust Gas Recirculation (EGR) valve, it
would typically be located? - ANSWER-On or near the intake manifold
2
,In the Northern Region, a licensed emissions inspector is performing the visual
portion of the emissions test. Which of the following emission controls is not
inspected? - ANSWER-OBD-II Check Engine Light
What is the primary function of the gas cap pressure relief valve? - ANSWER-To
lower internal fuel tank pressure
How often must PA Certified Emissions Inspectors update their Inspector
certification? - ANSWER-Every two years
A vehicle originally equipped with an Exhaust Gas Recirculation (EGR) system
arrives at an emissions inspection station for a PA Emissions Inspection. Two
inspectors are discussing how to perform the visual inspection of the EGR system.
Inspector "A" says: "Check to see if the EGR components exist, appears to be
properly connected, and appears to be the correct type for the vehicle."
Inspector "B" says: "Check to see if the EGR components exist, is properly
connected, and is functioning correctly based on manufacturer specifications."
Who is right? - ANSWER-A only
What is the primary purpose of the Air Injection Reaction (A.I.R.) System (air
pump or pulse air systems)? - ANSWER-To provide additional oxygen to the
exhaust system
What is the primary function of the Positive Crankcase Ventilation (PCV) valve? -
ANSWER-To regulate the flow of blow-by gases being removed from the crankcas
3
, There are two main types of Air Injection Reaction (A.I.R.) systems: one style uses
an air pump while the other does not. What does the A.I.R. system without an air
pump use? - ANSWER-Natural exhaust pulses to draw fresh air from the air
cleaner into the exhaust system
What is the primary function of the Catalytic Converter? - ANSWER-To convert
pollutants in the exhaust stream into environmentally acceptable non-pollutants
How often must PA Certified Emissions Inspectors update their certification? -
ANSWER-Every 2 years
What is the maximum fee that emission inspection stations are allowed to charge
for a PA Emission? - ANSWER-The fee is not regulated
What is the primary function of the Evaporative Control System? - ANSWER-To
collect and store vapors originating in the fuel system
What is the primary function of the Exhaust Gas Recirculation (EGR) system? -
ANSWER-To reduce NOX
Which Positive Crankcase Ventilation (PCV) system type is most common on
vehicles manufactured in recent years? - ANSWER-Type IV
The results of the visual inspection are reported for an individual component by
entering ______________________ in the inspection equipment? - ANSWER-
Pass, Fail or Not Applicable
How many attempts should be made to communicate with a vehicle experiencing
no communication issues? - ANSWER-3 times
4
2026 with a Review of 290 Real Exam Questions and
Correct Answers/ PA Emissions Exam Prep 2026-2027
Correctly Answered Questions Review
When performing an emissions inspection, the inspector must verify: - ANSWER-
A valid registration card
When a vehicle passes a PA Emissions Inspection, who is authorized to affix the
PA Emissions Inspection Certificate (emissions sticker) to the vehicle? -
ANSWER-PA Certified Emission Inspector
Two inspectors are discussing the PA Emission Inspection Program.
Inspector "A" says: "Current model year vehicles being registered for the first time
that have less than 5,000 miles on the odometer are eligible for an emission
exemption without an emission test."
Inspector "B" says: "Vehicles driven less than 5000 miles in the previous twelve
(12) months and that have been owned by the same person for at least one year are
eligible for an emission exemption without an emission test."
Who is right? - ANSWER-Both A and B
Two inspectors are discussing the PA Emission Inspection Program.
1
,Inspector "A" says: "Vehicles that fail the visual portion of the inspection should
receive a complete test before any repairs are made; however, a faulty or missing
gas cap may be replaced after receiving the customer's authorization."
Inspector "B" says: "Vehicles that pass the emission inspection will be issued a
Vehicle Inspection Report (VIR) and a PA Certificate of Emission Inspection
(emission sticker)."
Who is right? - ANSWER-Both A and B
The EPA has identified three harmful pollutants produced through inefficient
vehicle combustion and evaporation. These pollutants are: - ANSWER-HC, CO
and NOX
Inspector "A" says: "A vehicle that fails an initial emissions inspection is entitled
to one free retest until their current emission sticker expires."
Inspector "B" says: "Vehicle owners may request a retest at a facility other than the
one that performed the initial emissions test."
Who is right? - ANSWER-B only
What is the primary function of the gas cap vacuum relief valve? - ANSWER-To
allow fresh air to enter the fuel tank
If a vehicle were equipped with an Exhaust Gas Recirculation (EGR) valve, it
would typically be located? - ANSWER-On or near the intake manifold
2
,In the Northern Region, a licensed emissions inspector is performing the visual
portion of the emissions test. Which of the following emission controls is not
inspected? - ANSWER-OBD-II Check Engine Light
What is the primary function of the gas cap pressure relief valve? - ANSWER-To
lower internal fuel tank pressure
How often must PA Certified Emissions Inspectors update their Inspector
certification? - ANSWER-Every two years
A vehicle originally equipped with an Exhaust Gas Recirculation (EGR) system
arrives at an emissions inspection station for a PA Emissions Inspection. Two
inspectors are discussing how to perform the visual inspection of the EGR system.
Inspector "A" says: "Check to see if the EGR components exist, appears to be
properly connected, and appears to be the correct type for the vehicle."
Inspector "B" says: "Check to see if the EGR components exist, is properly
connected, and is functioning correctly based on manufacturer specifications."
Who is right? - ANSWER-A only
What is the primary purpose of the Air Injection Reaction (A.I.R.) System (air
pump or pulse air systems)? - ANSWER-To provide additional oxygen to the
exhaust system
What is the primary function of the Positive Crankcase Ventilation (PCV) valve? -
ANSWER-To regulate the flow of blow-by gases being removed from the crankcas
3
, There are two main types of Air Injection Reaction (A.I.R.) systems: one style uses
an air pump while the other does not. What does the A.I.R. system without an air
pump use? - ANSWER-Natural exhaust pulses to draw fresh air from the air
cleaner into the exhaust system
What is the primary function of the Catalytic Converter? - ANSWER-To convert
pollutants in the exhaust stream into environmentally acceptable non-pollutants
How often must PA Certified Emissions Inspectors update their certification? -
ANSWER-Every 2 years
What is the maximum fee that emission inspection stations are allowed to charge
for a PA Emission? - ANSWER-The fee is not regulated
What is the primary function of the Evaporative Control System? - ANSWER-To
collect and store vapors originating in the fuel system
What is the primary function of the Exhaust Gas Recirculation (EGR) system? -
ANSWER-To reduce NOX
Which Positive Crankcase Ventilation (PCV) system type is most common on
vehicles manufactured in recent years? - ANSWER-Type IV
The results of the visual inspection are reported for an individual component by
entering ______________________ in the inspection equipment? - ANSWER-
Pass, Fail or Not Applicable
How many attempts should be made to communicate with a vehicle experiencing
no communication issues? - ANSWER-3 times
4
