PA Emission Certification Test
QUESTIONS & ANSWERS | A+ GRADED
100% VERIFIED
• An emissions inspector must meet what requirements? -✓✓Be at least 18 years of
age
Have a valid driver's license
• To deliver emissions waivers you must become a(n)... -✓✓emissions Certified
Repair Technician (CRT)
• To become a CRT you must... -✓✓Have a valid driver's license
• What is the Northern-Emission Inspectors Certification program? -✓✓Limited to
performing the visual antitampering check and gas-cap test.
• Upon successful completion of the N-EIC program you will receive.. -✓✓An
emissions inspection ID card from PennDOT that allows you to perform
inspections on vehicles registered in the Northern Region counties only.
• Air pollution -✓✓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... -✓✓Human-made
• Major Pollutants -✓✓Hydrocarbons (HCs), carbon monoxide (CO), and nitrogen
oxides (NOx). (released from fossil fuels like gasoline and diesel)
• Hydrocarbons -✓✓Unburned fuel of any class of organic compounds composed
of carbon and hydrogen
• Carbon Monoxide -✓✓Colorless, odorless, and poisonous gas. Created when an
engine burns HV in the presence of O2.
• Oxygen -✓✓Too much or too little can cause improper combustion and result in
pollution
, • Ozone (Smog) -✓✓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) -✓✓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 -✓✓The relationship between HC, CO, O2, CO2, and NOx are
the same in all gasoline engines.
• Stoichiometric Ratio -✓✓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? -✓✓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? -✓✓It runs rich,
meaning combustion forms more CO and less CO2.
• What does it mean if Hc is high and CO is extremely low? -✓✓The engine is
either very lean or there's a misfire.
• What does it mean if CO is very high? -✓✓The engine is definitely rich, getting
too much fuel or not enough air.
• Why is oxygen the best lean indicator? -✓✓The levels change during lean
mixtures.
• Why is oxygen (O2) not a reliable rich indicator? -✓✓It is low whenever the
mixture is rich. Rich mixtures burn all available O2.
• When did PA implement itd first emissions I/M program? -✓✓1984
• In 1990 Congress set the requirements for an enhanced program in the Clean Air
Act Amendments which aimed to do what? -✓✓Lower harmful emissions and
increase accountability at the state level.
QUESTIONS & ANSWERS | A+ GRADED
100% VERIFIED
• An emissions inspector must meet what requirements? -✓✓Be at least 18 years of
age
Have a valid driver's license
• To deliver emissions waivers you must become a(n)... -✓✓emissions Certified
Repair Technician (CRT)
• To become a CRT you must... -✓✓Have a valid driver's license
• What is the Northern-Emission Inspectors Certification program? -✓✓Limited to
performing the visual antitampering check and gas-cap test.
• Upon successful completion of the N-EIC program you will receive.. -✓✓An
emissions inspection ID card from PennDOT that allows you to perform
inspections on vehicles registered in the Northern Region counties only.
• Air pollution -✓✓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... -✓✓Human-made
• Major Pollutants -✓✓Hydrocarbons (HCs), carbon monoxide (CO), and nitrogen
oxides (NOx). (released from fossil fuels like gasoline and diesel)
• Hydrocarbons -✓✓Unburned fuel of any class of organic compounds composed
of carbon and hydrogen
• Carbon Monoxide -✓✓Colorless, odorless, and poisonous gas. Created when an
engine burns HV in the presence of O2.
• Oxygen -✓✓Too much or too little can cause improper combustion and result in
pollution
, • Ozone (Smog) -✓✓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) -✓✓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 -✓✓The relationship between HC, CO, O2, CO2, and NOx are
the same in all gasoline engines.
• Stoichiometric Ratio -✓✓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? -✓✓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? -✓✓It runs rich,
meaning combustion forms more CO and less CO2.
• What does it mean if Hc is high and CO is extremely low? -✓✓The engine is
either very lean or there's a misfire.
• What does it mean if CO is very high? -✓✓The engine is definitely rich, getting
too much fuel or not enough air.
• Why is oxygen the best lean indicator? -✓✓The levels change during lean
mixtures.
• Why is oxygen (O2) not a reliable rich indicator? -✓✓It is low whenever the
mixture is rich. Rich mixtures burn all available O2.
• When did PA implement itd first emissions I/M program? -✓✓1984
• In 1990 Congress set the requirements for an enhanced program in the Clean Air
Act Amendments which aimed to do what? -✓✓Lower harmful emissions and
increase accountability at the state level.
