Emission Systems – general functions
Chose the best answer that best fits the following questions or statements
1. Three emissions being controlled in gasoline internal combustion engines are:
A) oxygen, hydrogen and carbon
B) unburned hydrocarbons, carbon monoxide and oxides of nitrogen
C) NOx, carbon dioxide and fluorocarbons
D) nitrogen, oxygen and unburned hydrocarbons
2. _____________ is an odorless, toxic gas that is the product of combustion and typically caused by excessive fuel or a lack of air.
A) hydrogen
B) fumes
C) nitrogen
D) carbon monoxide
3. Exhaust hydrocarbons, raw, unburned fuel indicating that complete combustion is not occurring in the engine, are measured in ____________ or _____________.
A) parts per million or grams per mile
B) miles per hour or grams per second
C) tubes or containers
D) the atmosphere or ozone
4. A five-gas analyzer measures:
A) CO1, CO2, CO3, CO4 and CO5
B) diesel, gasoline, ethanol, propane and methanol
C) HC, CO, CO2 O2 and NOx
D) R-134, R-12, CO, CO2 and H2o
5. A 240-second test of a vehicle’s emission system that simulates a short drive on city streets and then a longer drive on the highway is called acalled a(n) ___________.
A) Diagnostic Road Test
B) IM240 Test
C) Emission 24 Test
D) Gas Analyzer Test
6. Normal desired amounts of carbon dioxide during a four- or five-gas analyzer test is ________.
A) zero
B) 4-5 %
C) 10%
D) 13.4% or more
7. Many emission control devices that have been added to vehicles in the past 30 years, especially the ________________ which has significantly contributed to the reduction of HC and CO emissions from the exhaust.
A) Exhaust Gas Recirculation (EGR) valve
B) Positive Crankcase Ventilation (PCV) valve
C) Evaporative emissions canister
D) catalytic converter
8. During an emissions test, the maximum amount or limit of each gas that the vehicle is allowed to emit is represented by the __________ on the report.
A) bar line
B) cutpoint
C) Y-axis
D) drive cycles
9. A contaminated or plugged catalytic converter can cause all of the following except ________.
A) stalling after the engine is running
B) an increase in engine vacuum
C) a decreased production of NOx in the cylinders
D) decreased HC emissions from the tailpipe
10) Which of the following exhaust gasses are considered to be “favorable” pollutants?
A) hydrocarbons
B) oxygen
C) carbon monoxide
D) oxides of nitrogen
E) carbon dioxide
F) both B and E
G) both C and E
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Pop Quiz Emission Systems – Solution
1. Three emissions being controlled in gasoline internal combustion engines are:
B) unburned hydrocarbons, carbon monoxide and oxides of nitrogen
2. _____________ is an odorless, toxic gas that is the product of combustion and typically caused by excessive fuel or a lack of air.
D) carbon monoxide
3. Exhaust hydrocarbons, raw, unburned fuel indicating that complete combustion is not occurring in the engine, are measured in ____________ or _____________.
A) parts per million or grams per mile
4. A five-gas analyzer measures:
C) HC, CO, CO2 O2 and NOx
5. A 240-second test of a vehicle’s emission system that simulates a short drive on city streets and then a longer drive on the highway is called acalled a(n) ___________.
B) IM240 Test
6. Normal desired amounts of carbon dioxide during a four- or five-gas analyzer test is ________.
D) 13.4% or more
7. Many emission control devices that have been added to vehicles in the past 30 years, especially the ________________ which has significantly contributed to the reduction of HC and CO emissions from the exhaust.
D) catalytic converter
8. During an emissions test, the maximum amount or limit of each gas that the vehicle is allowed to emit is represented by the __________ on the report.
B) cutpoint
9. A contaminated or plugged catalytic converter can cause all of the following except ________.
D) decreased HC emissions from the tailpipe
10) Which of the following exhaust gasses are considered to be “favorable” pollutants?
F) both B and E
