PA Emission Certification EXAM STUDY
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS <NEWEST
VERSION>
What is a Northern Region Emission Inspector? - ANSWER Essentially worthless,
can only preform Visual Anti-Tampering Check and Gas cap test to vehicles.
What is a Emission Inspector? - ANSWER Good for the whole state. Can preform
Visual Anti-Tampering Check, Gas Cap, Two-Speed Idle Test, ASM5015
(Dynamometer), OBD I/M Checks. Also can preform One-Speed Idle test, but is
not necessary since that specific test is obsolete.
What is a Emission Repair Technician? - ANSWER Waiver, allows vehicles that
have failed the I/M tests to apply for a waiver after specific procedures are
followed.
How old must you be to become a PA certified Emission Inspector? - ANSWER
18 years old.
What makes a vehicle a subject vehicle? - ANSWER The vehicle must be gasoline
powered, 1975 and newer, the gross vehicle weight must be less than 9,000 pounds
or less, and is registered to an I/M area.
,Where do you find the Gross vehicle weight (GVWR)? - ANSWER The GVWR
or true weight of the car should be located on the vehicle. The inspector should
NOT use the vehicles registration card.
What vehicles are non subject vehicles? - ANSWER Motorcycles and motorized
pedal cycles.
Note*
There are definitely more non subject vehicles.
Station Hotline - ANSWER (888) 265-5909
Customer Hotline - ANSWER (800) 265-0921
Sticker Department - ANSWER (717) 705-2182
An emissions inspector must meet what requirements? - ANSWER Be at least 18
years of age
Have a valid driver's license
To deliver emissions waivers you must become a(n)... - ANSWER emissions
Certified Repair Technician (CRT)
To become a CRT you must... - ANSWER Have a valid driver's license
What is the Northern-Emission Inspectors Certification program? - ANSWER
Limited to performing the visual antitampering check and gas-cap test.
, Upon successful completion of the N-EIC program you will receive.. - ANSWER
An emissions inspection ID card from PennDOT that allows you to perform
inspections on vehicles registered in the Northern Region counties only.
Air pollution - ANSWER Contamination of the atmosphere by gaseous, liquids or
solid wastes or byproducts. Emitted from natural or human-made sources.
Most of the world's air pollution problems are... - ANSWER Human-made
Major Pollutants - ANSWER Hydrocarbons (HCs), carbon monoxide (CO), and
nitrogen oxides (NOx). (released from fossil fuels like gasoline and diesel)
Hydrocarbons - ANSWER Unburned fuel of any class of organic compounds
composed of carbon and hydrogen
Carbon Monoxide - ANSWER Colorless, odorless, and poisonous gas. Created
when an engine burns HV in the presence of O2.
Oxygen - ANSWER Too much or too little can cause improper combustion and
result in pollution
Ozone (Smog) - ANSWER Not emitted directly into the air, it is created at ground
level by a chemical reaction between NOx and HC in the presence of sunlight .
Nitrogen Oxides (NOx) - ANSWER Excessive amounts can be caused by a lean
air-fuel mixture, a defective exhaust gas recirculation valve, higher than normal
engine temperatures, vacuum leaks, and advanced ignition timing.
, Five Gas Theory - ANSWER The relationship between HC, CO, O2, CO2, and
NOx are the same in all gasoline engines.
Stoichiometric Ratio - ANSWER For all engines, a mixture of approx. 14.7 parts
of air to every one-part of fuel produces the most efficient use of fuel and the
lowest emissions.
Why would hydrocarbon be higher than the stoichiometric ratio? - ANSWER The
mixture is very rich or very lean. Normal combustion is 15:1 air/fuel ratio.
What happens when there is not enough O2 in an engine? - ANSWER It runs rich,
meaning combustion forms more CO and less CO2.
What does it mean if Hc is high and CO is extremely low? - ANSWER The engine
is either very lean or there's a misfire.
What does it mean if CO is very high? - ANSWER The engine is definitely rich,
getting too much fuel or not enough air.
Why is oxygen the best lean indicator? - ANSWER The levels change during lean
mixtures.
Why is oxygen (O2) not a reliable rich indicator? - ANSWER It is low whenever
the mixture is rich. Rich mixtures burn all available O2.
When did PA implement itd first emissions I/M program? - ANSWER 1984
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS <NEWEST
VERSION>
What is a Northern Region Emission Inspector? - ANSWER Essentially worthless,
can only preform Visual Anti-Tampering Check and Gas cap test to vehicles.
What is a Emission Inspector? - ANSWER Good for the whole state. Can preform
Visual Anti-Tampering Check, Gas Cap, Two-Speed Idle Test, ASM5015
(Dynamometer), OBD I/M Checks. Also can preform One-Speed Idle test, but is
not necessary since that specific test is obsolete.
What is a Emission Repair Technician? - ANSWER Waiver, allows vehicles that
have failed the I/M tests to apply for a waiver after specific procedures are
followed.
How old must you be to become a PA certified Emission Inspector? - ANSWER
18 years old.
What makes a vehicle a subject vehicle? - ANSWER The vehicle must be gasoline
powered, 1975 and newer, the gross vehicle weight must be less than 9,000 pounds
or less, and is registered to an I/M area.
,Where do you find the Gross vehicle weight (GVWR)? - ANSWER The GVWR
or true weight of the car should be located on the vehicle. The inspector should
NOT use the vehicles registration card.
What vehicles are non subject vehicles? - ANSWER Motorcycles and motorized
pedal cycles.
Note*
There are definitely more non subject vehicles.
Station Hotline - ANSWER (888) 265-5909
Customer Hotline - ANSWER (800) 265-0921
Sticker Department - ANSWER (717) 705-2182
An emissions inspector must meet what requirements? - ANSWER Be at least 18
years of age
Have a valid driver's license
To deliver emissions waivers you must become a(n)... - ANSWER emissions
Certified Repair Technician (CRT)
To become a CRT you must... - ANSWER Have a valid driver's license
What is the Northern-Emission Inspectors Certification program? - ANSWER
Limited to performing the visual antitampering check and gas-cap test.
, Upon successful completion of the N-EIC program you will receive.. - ANSWER
An emissions inspection ID card from PennDOT that allows you to perform
inspections on vehicles registered in the Northern Region counties only.
Air pollution - ANSWER Contamination of the atmosphere by gaseous, liquids or
solid wastes or byproducts. Emitted from natural or human-made sources.
Most of the world's air pollution problems are... - ANSWER Human-made
Major Pollutants - ANSWER Hydrocarbons (HCs), carbon monoxide (CO), and
nitrogen oxides (NOx). (released from fossil fuels like gasoline and diesel)
Hydrocarbons - ANSWER Unburned fuel of any class of organic compounds
composed of carbon and hydrogen
Carbon Monoxide - ANSWER Colorless, odorless, and poisonous gas. Created
when an engine burns HV in the presence of O2.
Oxygen - ANSWER Too much or too little can cause improper combustion and
result in pollution
Ozone (Smog) - ANSWER Not emitted directly into the air, it is created at ground
level by a chemical reaction between NOx and HC in the presence of sunlight .
Nitrogen Oxides (NOx) - ANSWER Excessive amounts can be caused by a lean
air-fuel mixture, a defective exhaust gas recirculation valve, higher than normal
engine temperatures, vacuum leaks, and advanced ignition timing.
, Five Gas Theory - ANSWER The relationship between HC, CO, O2, CO2, and
NOx are the same in all gasoline engines.
Stoichiometric Ratio - ANSWER For all engines, a mixture of approx. 14.7 parts
of air to every one-part of fuel produces the most efficient use of fuel and the
lowest emissions.
Why would hydrocarbon be higher than the stoichiometric ratio? - ANSWER The
mixture is very rich or very lean. Normal combustion is 15:1 air/fuel ratio.
What happens when there is not enough O2 in an engine? - ANSWER It runs rich,
meaning combustion forms more CO and less CO2.
What does it mean if Hc is high and CO is extremely low? - ANSWER The engine
is either very lean or there's a misfire.
What does it mean if CO is very high? - ANSWER The engine is definitely rich,
getting too much fuel or not enough air.
Why is oxygen the best lean indicator? - ANSWER The levels change during lean
mixtures.
Why is oxygen (O2) not a reliable rich indicator? - ANSWER It is low whenever
the mixture is rich. Rich mixtures burn all available O2.
When did PA implement itd first emissions I/M program? - ANSWER 1984
