PA Emission Certification Questions and
Answers (2026/2027) | Updated Review |
A+ Verified
• An emissions inspector must meet what requirements? CORRECT ANSWER: Be
at least 18 years of age
Have a valid driver's license
• To deliver emissions waivers you must become a(n)... CORRECT ANSWER:
emissions Certified Repair Technician (CRT)
• To become a CRT you must... CORRECT ANSWER: Have a valid driver's
license
• What is the Northern-Emission Inspectors Certification program? CORRECT
ANSWER: Limited to performing the visual antitampering check and gas-cap test.
• Upon successful completion of the N-EIC program you will receive.. CORRECT
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 CORRECT 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... CORRECT ANSWER: Human-
made
, • Major Pollutants CORRECT ANSWER: Hydrocarbons (HCs), carbon monoxide
(CO), and nitrogen oxides (NOx). (released from fossil fuels like gasoline and
diesel)
• Hydrocarbons CORRECT ANSWER: Unburned fuel of any class of organic
compounds composed of carbon and hydrogen
• Carbon Monoxide CORRECT ANSWER: Colorless, odorless, and poisonous
gas. Created when an engine burns HV in the presence of O2.
• Oxygen CORRECT ANSWER: Too much or too little can cause improper
combustion and result in pollution
• Ozone (Smog) CORRECT 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) CORRECT 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 CORRECT ANSWER: The relationship between HC, CO, O2,
CO2, and NOx are the same in all gasoline engines.
• Stoichiometric Ratio CORRECT 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.
Answers (2026/2027) | Updated Review |
A+ Verified
• An emissions inspector must meet what requirements? CORRECT ANSWER: Be
at least 18 years of age
Have a valid driver's license
• To deliver emissions waivers you must become a(n)... CORRECT ANSWER:
emissions Certified Repair Technician (CRT)
• To become a CRT you must... CORRECT ANSWER: Have a valid driver's
license
• What is the Northern-Emission Inspectors Certification program? CORRECT
ANSWER: Limited to performing the visual antitampering check and gas-cap test.
• Upon successful completion of the N-EIC program you will receive.. CORRECT
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 CORRECT 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... CORRECT ANSWER: Human-
made
, • Major Pollutants CORRECT ANSWER: Hydrocarbons (HCs), carbon monoxide
(CO), and nitrogen oxides (NOx). (released from fossil fuels like gasoline and
diesel)
• Hydrocarbons CORRECT ANSWER: Unburned fuel of any class of organic
compounds composed of carbon and hydrogen
• Carbon Monoxide CORRECT ANSWER: Colorless, odorless, and poisonous
gas. Created when an engine burns HV in the presence of O2.
• Oxygen CORRECT ANSWER: Too much or too little can cause improper
combustion and result in pollution
• Ozone (Smog) CORRECT 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) CORRECT 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 CORRECT ANSWER: The relationship between HC, CO, O2,
CO2, and NOx are the same in all gasoline engines.
• Stoichiometric Ratio CORRECT 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.
