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 zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Particulate and gaseous pollutants along with harmless gases are released from the thermal power plants. Name the most widely used device of removing particulate pollutants from the air.

  1. Electrostatic precipitator

  2. Fabric filters

  3. Cyclone separators

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An electrostatic precipitator is widely used to eliminate particulate and gaseous pollutants from the air with the help of a high-voltage electrostatic charge. Thermal power plants release various harmful gases and particulate matter in the environment such as sulfur dioxide, carbon dioxide, nitrogen oxides, and other harmful emissions. Electrostatic precipitators are known to be very effective in removing the harmful chemicals present in the emissions. They are the best device for controlling air pollution.

So, the correct answer is 'Electrostatic precipitator'.

Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Which source of air pollution has a large stationary source?

  1. Point Source

  2. Area Source

  3. Line Source

  4. Mobile Source
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A point source of air pollution refers to a single, identifiable stationary location, such as a factory smokestack or a power plant, which releases pollutants into the atmosphere.

Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Which one of the following is not a device used to control a particulate matter? 

  1. Arresters

  2. Scrubbers

  3. Filters

  4. Electrostatic precipitator

  5. Incinerator
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

  • Incineration is a waste treatment process that involves the combustion of organic substances contained in waste materials.
  •  Incineration and other high temperature waste treatment systems are described as "thermal treatment".
  •  Incineration of waste materials converts the waste into ash, flue gas and heat.
  • Hence, Incinerator is not a device used to control a particulate matter.
So, the correct answer is 'Incinerator'.

Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

In a coal fired power plant electrostatic precipitators metabolites are installed to control emission of 

  1. CO
  2. $SO _2$
  3. $NO _x$

  4. SPM
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Coal burning results in the generation of large quantities of coal residues, which contains very fine particles that tend to become airborne and which contribute to the formation of suspended particulate matter (SPM). 

  • An electrostatic precipitator (ESP) is a filtration method that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.

    Hence, option D is correct.
Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Which one of the following will not control particulate pollutants?

  1. Incinerator

  2. Arrester

  3. Scrubber

  4. Filter

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

Incineration is also called as a thermal process, it involves combustion of organic substances contained in waste material. It converts the waste material into ash, gases, particles and heat which are then put into the application for generation of electricity. The incinerator is the device where waste is burnt e.g. furnace. Now incinerators are equipped with systems to reduce the emission of highly toxic gases during the process. The output of incinerator is gases, particles and heat thus for controlling particulate pollutant filtration and precipitators are installed to clean out the gases as a result of incineration. These do not have any control over particulate pollutants.

Hence the correct answer is 'Incinerator'.

Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Catalytic converter used for controlling pollution is used in

  1. Thermal plants

  2. Chimneys

  3. Brick kilns

  4. Motor vehicles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The catalytic converter is used to convert toxic and harmful pollutant into less toxic emission before they are released in the atmosphere from the engine of motor vehicles. The catalytic converter works as two types- reduction catalyst and the oxidation catalyst. The catalyst is a substance that causes or accelerates a chemical reaction without being unaffected. The catalytic converter reduces carbon monoxide hydrocarbon and nitrous oxides. The reduction catalyst separates nitrogen atom out of nitrous oxides and freezes oxygen, the nitrogen atom combines with another nitrogen atoms forming Nitrogen. The oxidation catalyst reduces the carbon monoxide by oxidizing by reacting carbon monoxide with oxygen in exhaust gas forming carbon dioxide.
Hence, the correct answer is 'Motor vehicles'.
Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Gaseous pollutants are controlled through

  1. Adsorption

  2. ESP

  3. Arrestors

  4. Pyrolysis

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

Gaseous pollutants include dust, aerosols, suspended particulate matter etc. that are removed by the principle of adsorption. Electrostatic precipitators, cyclones, scrubbers etc. are some devices that can control the gaseous pollutants. These are either made to be retained by the electrostatic field or by pressure. Pyrolisis and incineration are performed for solid pollutants. Arrestors are used to protect the types of equipment from the damaging effect of lightning.

Hence, the correct answer is 'Adsorption'.

Multiple choice zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

Electrostatic precipitators (ESP) are used to control

  1. pesticide pollution

  2. air pollution

  3. radioactive pollution

  4. water pollution
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electrostatic precipitators (ESP)  is a device that removes suspended dust particles from a gas or exhaust by applying a high-voltage electrostatic charge and collecting the particles on charged plates. Electrostatic precipitator, also called electrostatic air cleaner, a device that uses an electric charge to remove certain impurities—either solid particles or liquid droplets—from the air or other gases.

So, the correct option is 'Air pollution'.

Multiple choice zoology environmental factors soil-nature climate factors abiotic components organisms and environment

Which of the following is not properly matched?

  1. Formaldehyde- Carcinogenic

  2. Sulphur dioxide - Respiratory problems

  3. Nitrogen oxide - Brown air
  4. Mean annual temperature - $25^o$C

  5. Photochemical smog - Grey air
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mean annual temperature is calculated by subtracting the lowest recorded temperature from the highest recorded temperature of the of the day. It can vary depending on the weather and climate of an area.

A. Formaldehyde has been classified as cancer causing agent by the EPA. It has shown leukaemia incidences.
B. Sulphur dioxide is responsible for the respiratory tract diseases like asthma, bronchitis etc.
C. Nitrogen oxide is called the brown air because of the change in frequencies of absorption of light when nitrogen combines with the oxygen.
D. Mean annual temperature can vary depending on the weather and climatic conditions.
E. Photochemical smog forms grey air due to the formation of ozone and PAN that decreases the visibility.
Hence, the correct answer is 'Mean annual temperature - 25$^{o}$C'

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

A substance that pollute something is called as 

  1. Sewage

  2. Particulate

  3. Pollutant

  4. Smog
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pollutant is a substance which when introduced into the environment has undesired effects. Pollutant causes long- or short-term damage by changing the environmental factors. Some pollutants are biodegradable and therefore do not persist in the environment in the long term. However, the degradation products of some pollutants are themselves polluting such as the products DDE and DDD produced from degradation of DDT.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Pollutants in form of fine dust particles are known as

  1. Dry Deposits

  2. Wet Deposits

  3. Rain

  4. Snow
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dry deposition refers to the process where fine dust particles, aerosols, and gases settle out of the atmosphere onto surfaces without the presence of precipitation.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

For which of the following PM10 and PM2.5 Samplers are used?

  1. Food adulteration

  2. Adulterated Petrol

  3. Environment Pollution

  4. Noise Pollution
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

PM10 and PM2.5 refer to particulate matter with diameters of 10 micrometers or less and 2.5 micrometers or less, respectively, which are standard metrics for measuring air pollution.

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Which is not a pollutant from exhaust of motor vehicle?

  1. SO$ _2$

  2. CO

  3. Fly ash

  4. Hydrocarbon gas
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fly ash is produced due to the incomplete burning or combustion of the fossil fuels. The ash contains the carbon particles or flecks which are suspended in the air. The pollutants which are released from the exhaust of the motor vehicle are particulate matter, SO$ _2$, NO$ _x$, CO, etc. 

Thus, the correct answer is option C. 

Multiple choice business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

Which of the following statements is true?

  1. Lichens are affected by SO$ _2$.

  2. All pollutants are not waste.

  3. Carbon monoxide is a serious pollutant.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lichens are well-known bioindicators sensitive to SO2, CO is a toxic pollutant, and not all pollutants are waste (some are useful substances in the wrong place).