Lesson: Reduction of Air Pollutants

What is the purpose of vapor recovery nozzles on gasoline pumps?

• To increase fuel efficiency

• To capture fumes (VOCs) from escaping into the atmosphere

• To speed up the fueling process

• To reduce noise pollution

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-LS2-7

What do catalytic converters do in automobiles?

• Convert pollutants into less harmful molecules

• Increase engine power

• Reduce fuel consumption

• Enhance vehicle speed

Tags

NGSS.MS-PS1-2

What is the purpose of wet and dry scrubbers in coal-burning power plants?

• To increase the efficiency of power generation

• To remove air pollutants like particulates

• To enhance the combustion process

• To reduce water usage

How do wet scrubbers help in reducing air pollution?

• By using a chemical reaction to neutralize pollutants

• By using a shower of water mist to separate pollutants

• By filtering out large particles only

• By increasing the temperature of exhaust gases

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What happens to the particles collected by the mist in the scrubber?

• They are burned.

• They are brought down to the bottom of the unit.

• They are dissolved in water.

• They are released into the atmosphere.

What exits through the stack after the scrubbing process?

• Dirty air

• Sludge

• Cleaner air

• Water mist

What do electrostatic precipitators use to remove fine particles from exhaust streams?

• Electrical charge attractions

• Chemical reactions

• Heat absorption

• Magnetic fields

Tags

NGSS.MS-PS2-3

What happens to the negatively charged particles?

• They are attracted to negatively charged plates.

• They are attracted to positively charged collection plates.

• They are released into the air.

• They are neutralized.

Tags

NGSS.MS-PS2-5

What is the purpose of periodically discharging the positive collection plates?

• To clean the plates.

• To remove the particles from the system.

• To increase the charge on the plates.

• To cool down the system.

Tags

NGSS.HS-PS3-5

What is the primary purpose of the Clean Air Act?

• To promote industrial growth

• To set air quality standards to protect human and environmental health

• To increase automobile production

• To reduce water pollution