AP Environmental Science Practice Quiz: Reduction of Air Pollutants
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Test your understanding with short quizzes. This quiz has 11 questions to check your progress.
Question 1 of 11
All Questions (11)
A) To convert harmful exhaust gases into less harmful substances.
B) To remove particulates from industrial smokestacks.
C) To prevent gasoline fumes from escaping into the atmosphere during refueling.
D) To increase the fuel efficiency of the vehicle.
Correct Answer: C
The provided content states that a vapor recovery nozzle is an air pollution control device on a gasoline pump that prevents fumes from escaping into the atmosphere.
A) Particulates, sulfur dioxide, and mercury
B) Carbon monoxide, nitrogen oxides, and hydrocarbons
C) Carbon dioxide, water vapor, and nitrogen gas
D) Ozone, lead, and volatile organic compounds
Correct Answer: B
The content specifies that a catalytic converter converts pollutants like CO (carbon monoxide), NOx (nitrogen oxides), and hydrocarbons into less harmful molecules.
A) Vehicle exhaust pipes
B) Gasoline pump nozzles
C) Indoor air circulation systems
D) Industrial exhaust streams
Correct Answer: D
According to the text, wet and dry scrubbers are air pollution control devices that remove particulates and/or gases from industrial exhaust streams.
A) Catalytic converters on the smokestacks
B) Vapor recovery nozzles on the coal chutes
C) Wet or dry scrubbers in the exhaust stream
D) A fleet of electric vehicles for plant operations
Correct Answer: C
The content states that wet and dry scrubbers are used to remove particulates and/or gases from industrial exhaust streams, which is the exact application needed for a coal-fired power plant.
A) Wet scrubber
B) Vapor recovery nozzle
C) Catalytic converter
D) Dry scrubber
Correct Answer: C
The text explicitly identifies the catalytic converter as an air pollution control device for internal combustion engines.
A) physically removes particulates, while a scrubber chemically alters gases.
B) is used on industrial smokestacks, while a scrubber is used on vehicles.
C) converts gaseous pollutants into different, less harmful gases, while a scrubber removes particulates and/or gases from an exhaust stream.
D) prevents fumes from escaping at the source, while a scrubber treats pollutants after combustion.
Correct Answer: C
A catalytic converter causes a chemical reaction to change pollutants (CO, NOx) into less harmful substances (CO2, N2). A scrubber physically removes pollutants from the exhaust stream. This highlights the core difference in their mechanisms of action.
A) Technological, economic, and social practices
B) Source reduction, emission control, and atmospheric cleanup
C) Regulatory practices, conservation practices, and alternative fuels
D) Catalytic conversion, scrubbing, and vapor recovery
Correct Answer: C
The content explicitly lists the methods to reduce air pollutants as regulatory practices, conservation practices, and alternative fuels.
A) Installing a catalytic converter on a car.
B) A government mandate requiring power plants to use scrubbers.
C) Carpooling or using public transportation to reduce vehicle miles traveled.
D) Using a vapor recovery nozzle when refueling a car.
Correct Answer: C
Carpooling is a conservation practice because it reduces the overall consumption of fuel. Installing devices like catalytic converters (A) or vapor recovery nozzles (D) are technological solutions, and a government mandate (B) is a regulatory practice.
A) Ozone (O3), sulfur dioxide (SO2), and particulates
B) Ammonia (NH3), methane (CH4), and oxygen (O2)
C) Carbon dioxide (CO2), nitrogen gas (N2), and water (H2O)
D) Lead (Pb), mercury (Hg), and volatile organic compounds (VOCs)
Correct Answer: C
The text states that a catalytic converter transforms pollutants (CO, NOx, and hydrocarbons) into less harmful molecules, specifically listing CO2, N2, O2, and H2O as the products. Option C contains the primary products of this conversion.
A) A vapor recovery nozzle
B) A catalytic converter
C) A wet scrubber
D) The use of alternative fuels
Correct Answer: D
A vapor recovery nozzle, a catalytic converter, and a wet scrubber are all specific technological devices designed to control pollution. The use of alternative fuels is a broader strategy or practice, not a device in the same sense.
A) Catalytic converter
B) Vapor recovery nozzle
C) Wet scrubber
D) Dry scrubber
Correct Answer: B
The content specifies that a vapor recovery nozzle is used on a gasoline pump to prevent fumes from escaping into the atmosphere. Gasoline fumes are a primary source of VOCs during refueling.