Environmental Studies

Air Pollution

2,340 Questions

Air pollution questions address the sources of emissions, indoor air quality, and the formation of photochemical smog. You will explore the impact of particulate matter, acid rain, and urban pollutants. This is a highly relevant subject for environmental studies and general awareness tests.

Photochemical smogParticulate matter emissionsAcid rain causesIndoor air pollutionAmmonia emissions

Air Pollution Questions

Multiple choice

Which of the following is an air pollutant generated by thermal power plants?

  1. Fly ash

  2. Smoke

  3. Carbon monoxide

  4. Nitrogen dioxide

  5. Lead
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The thermal power plants generate significantly large quantities of solid byproduct namely fly ash. Fly ash also known as flue-ash is one of the residues generated in combustion and comprises the fine particles that rise with the flue gases. The fine particles of fly ash reach the pulmonary region of the lungs and remain there for long periods of time where they behave like cumulative poisons.

Multiple choice

Which of these cannot be considered as an air pollutant?

  1. CNG

  2. Particulate matter

  3. Nitrogen dioxide

  4. Lead

  5. Carbon monoxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Compressed natural gas (CNG) is a fossil fuel substitute for gasoline (petrol), diesel fuel and propane/LPG. Although CNG's combustion does produce greenhouse gases, it is widely considered a more environmentally clean alternative to conventional fuels. The pollution loads have been calculated and compared by considering usage of the compressed natural gas (CNG) in place of conventional diesel buses. One study reveals that the use of CNG shows tremendous reduction in various pollutants in gm/km. By the use of CNG there is 84% reduction in CO, 58% reduction in oxides of nitrogen and 97% reduction in particulate matter.

Multiple choice

Directions: Choose the best out of the available options to fill the blank against the question.

The air inside a house or office building often has higher concentrations of contaminants ______ heavily polluted outside air.

  1. than does

  2. same as

  3. unlike

  4. like

  5. than is
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Comparisons with 'than' require auxiliary verbs when comparing subjects. 'Than does' correctly compares 'the air inside' with 'heavily polluted outside air'. 'Than is' would be incorrect because we're comparing subjects, not the air itself.

Multiple choice

Which of the following gaseous pollutants is not emitted from vehicles?

  1. Carbon dioxide (CO2)

  2. Sulphur dioxide (SO2)

  3. Fluorine oxide (FO)

  4. Carbon monoxide (CO)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Most of the vehicles run on petrol and diesel. The combustion of fuel exhausts out mainly three gaseous pollutants; carbon dioxide (CO2), sulphur dioxide (SO2) and carbon monoxide (CO).

Multiple choice

What is smog?

  1. Smoke + carbon dioxide

  2. Fog + carbon monoxide

  3. Fog + smoke

  4. Carbon dioxide + carbon monoxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Smog is fog + smoke.