PA Emissions Inspection UPDATED
ACTUAL Exam Questions and CORECT
Answers
What health problems can pollution cause? - CORRECT ANSWER Respiratory issues
What percent of air pollution is caused by vehicles? - CORRECT ANSWER 20%
How much less air pollution do we have now than in the 1960s? (%) - CORRECT
ANSWER 98% less
What is the average thermal efficiency? (%) - CORRECT ANSWER 20%
Where does 80% of the rest of the fuel go to? - CORRECT ANSWER Friction, heat, and
emissions
What are the 5 major pollutants? - CORRECT ANSWER Hydrocarbons (HC), Carbon
monoxide (CO), Oxides of nitrogen (NOx), Sulfur dioxide (SO2), and particulate matter
What are hydrocarbons? - CORRECT ANSWER Unburned fuel of carbon and hydrogen
What are hydrocarbons emitted through? - CORRECT ANSWER Incomplete combustion
and fuel evaporation
What are hydrocarbons caused by? - CORRECT ANSWER Misfire, rich, ignition timing,
engine deficiencies, and fuel injectors
What has lowered hydrocarbons? - CORRECT ANSWER OBD 2, component controls,
fuel delivery, ignition, emissions system, and EVAPs
, Can you see or smell carbon monoxide? - CORRECT ANSWER No
Is carbon monoxide harmful or nonharmful? - CORRECT ANSWER Harmful
How is carbon monoxide made? - CORRECT ANSWER Incomplete burning of fuel
What is carbon monoxide caused by?` - CORRECT ANSWER rich, dirty air filter, fuel
injectors, high fuel pressure, defective sensors, plugged PCV valve, heat riser valve stuck open,
air pump malfunction, oil diluted with gas
How is nitrogen oxide made? - CORRECT ANSWER Combustion of fuel at high
temperatures
What is nitrogen oxide the cause of? - CORRECT ANSWER Acid rain
What type of health issues does nitrogen oxide cause? - CORRECT ANSWER Respiratory
issues
What is nitrogen oxide caused by? - CORRECT ANSWER lean, defective EGR, high
temperature, vacuum leaks, advance ignition timing
What can too little or too much oxygen cause? - CORRECT ANSWER Improper
combustion
What is too little oxygen caused by? - CORRECT ANSWER rich, dirty air filter, fuel
injectors, high fuel pressure, defective sensors, restricted PCV valve, EVAP purges at idle
What is too much oxygen caused by? - CORRECT ANSWER lean, misfire, vacuum leak,
exhaust leak
ACTUAL Exam Questions and CORECT
Answers
What health problems can pollution cause? - CORRECT ANSWER Respiratory issues
What percent of air pollution is caused by vehicles? - CORRECT ANSWER 20%
How much less air pollution do we have now than in the 1960s? (%) - CORRECT
ANSWER 98% less
What is the average thermal efficiency? (%) - CORRECT ANSWER 20%
Where does 80% of the rest of the fuel go to? - CORRECT ANSWER Friction, heat, and
emissions
What are the 5 major pollutants? - CORRECT ANSWER Hydrocarbons (HC), Carbon
monoxide (CO), Oxides of nitrogen (NOx), Sulfur dioxide (SO2), and particulate matter
What are hydrocarbons? - CORRECT ANSWER Unburned fuel of carbon and hydrogen
What are hydrocarbons emitted through? - CORRECT ANSWER Incomplete combustion
and fuel evaporation
What are hydrocarbons caused by? - CORRECT ANSWER Misfire, rich, ignition timing,
engine deficiencies, and fuel injectors
What has lowered hydrocarbons? - CORRECT ANSWER OBD 2, component controls,
fuel delivery, ignition, emissions system, and EVAPs
, Can you see or smell carbon monoxide? - CORRECT ANSWER No
Is carbon monoxide harmful or nonharmful? - CORRECT ANSWER Harmful
How is carbon monoxide made? - CORRECT ANSWER Incomplete burning of fuel
What is carbon monoxide caused by?` - CORRECT ANSWER rich, dirty air filter, fuel
injectors, high fuel pressure, defective sensors, plugged PCV valve, heat riser valve stuck open,
air pump malfunction, oil diluted with gas
How is nitrogen oxide made? - CORRECT ANSWER Combustion of fuel at high
temperatures
What is nitrogen oxide the cause of? - CORRECT ANSWER Acid rain
What type of health issues does nitrogen oxide cause? - CORRECT ANSWER Respiratory
issues
What is nitrogen oxide caused by? - CORRECT ANSWER lean, defective EGR, high
temperature, vacuum leaks, advance ignition timing
What can too little or too much oxygen cause? - CORRECT ANSWER Improper
combustion
What is too little oxygen caused by? - CORRECT ANSWER rich, dirty air filter, fuel
injectors, high fuel pressure, defective sensors, restricted PCV valve, EVAP purges at idle
What is too much oxygen caused by? - CORRECT ANSWER lean, misfire, vacuum leak,
exhaust leak
