Category: Environmental Engineering – MCQ

# Levels of Noise – MCQ || Environmental Engineering ||

## Levels of Noise – MCQ

1. What is the mathematical expression of sound level in decibels?

a) $L = 10. \log_{10} \frac{Q}{Q_{0}}$
b) $L = \log_{10} \frac{Q}{Q_{0}}$
c) $L = \log_{e} \frac{Q}{Q_{0}}$
d) $L = 10. \log_{e} \frac{Q}{Q_{0}}$

a) $L = 10. \log_{10} \frac{Q}{Q_{0}}$.

2. What is the unit of intensity of sound?

a) Pascal.
b) Decimal.
c) Decibels.
d) Bels/meter.

c) Decibels.

3. What is the mathematical expression of sound intensity level in decibels?

a) $L = 10.\log_{e} \left ( \frac{1}{10^{-10}} \right )$
b) $L = \log_{10} \left ( \frac{1}{10^{-10}} \right )$
c) $L = 20.\log_{10} \left ( \frac{1}{10^{-10}} \right )$
d) $L = 10.\log_{10} \left ( \frac{1}{10^{-10}} \right )$

d) $L = 10.\log_{10} \left ( \frac{1}{10^{-10}} \right )$.

4. Which of the following value of reference sound pressure level is considered to measure sound level in decibels?

a) 180μPa
b) 40μPa
c) 20μPa
d) 10μPa

c) 20μPa

5. Which of the following expressions represent the sound pressure level in decibels?

a) $L_{p} = 10.\log_{10} \left ( \frac{p_{rms}}{20 \mu Pa} \right )$
b) $L_{p} = 20.\log_{10} \left ( \frac{p_{rms}}{20 \mu Pa} \right )$
c) $L_{p} = 10.\log_{e} \left ( \frac{p_{rms}}{20 \mu Pa} \right )$
d) $L_{p} = 20.\log_{e} \left ( \frac{p_{rms}}{20 \mu Pa} \right )$

b) $L_{p} = 20.\log_{10} \left ( \frac{p_{rms}}{20 \mu Pa} \right )$

6. What is the maximum sound level that is safe for the human ear?

a) At or below 70 dBA
b) At or below 85 dBA
c) At or above 70 dBA
d) At 85 dBA

a) At or below 70 dBA

7. If you consider 50 decibels noise and want to add another 50 decibels noise, then how much noise it will make up together?

a) 100 Decibels
b) 93 Decibels
c) 53 Decibels
d) 55 Decibels

c) 53 Decibels.

8. What do you mean by the frequency of sound?

a) Number of waves per minute
b) Number of vibrations per unit time
c) Total Number of waves per sec
d) None of these

b) Number of vibrations per unit time.

9. What is the acceptable noise level for hospitals as per BIS code 495-1968?

a) 25 to 30 dBA
b) 35 to 40 dBA
c) 40 to 45 dBA
d) 50 to 60 dBA

b) 35 to 40 dBA.

10. What is the relation between bel and decibel

a) 1 bel equal to 10 decibels
b) 10 bels equal to 1 decibel
c) 1 bel equal to 100 decibels
d) None of these

a) 1 bel equal to 10 decibels.

Kyoto Protocol -MCQ

Montreal Protocol – MCQ

What are the 10 Major Causes of Noise Pollution?

# E-Waste – MCQ || Environmental Engineering ||

## E-Waste – MCQ

1. E-waste is also known as

a) Electronic waste.
b) Essential waste.
c) European waste.
d) Household waste.

a) Electronic waste.

2. Which one of the following is an example of e-waste?

a) Nuclear wastes, medical wastes, toxic industrial wastes, etc.
b) Plastic bags, cardboard boxes, corroded metals, etc.
c) Beverage cans, packaged boxes, plastic bottles, etc.
d) Sensors, alarms, sirens, TV, etc.

d) Sensors, alarms, sirens, TV etc.

3. Which one of the following is wrong about Cathode Ray Tubes (CRTs)?

a) They were used in television sets.
b) They do not pose any environmental threat as such.
c) They have a high content of carcinogens and heavy metals.
d) They release toxins into the soil, air, and groundwater.

b) They do not pose any environmental threat as such.

4. What is the most widely used method for e-waste disposal?

a) Burning
b) Recycling
c) Disintegration
d) Land-filling.

D ) Land-filling.

5. Name some of the most hazardous leachates found in land-fills.

a) Copper, and Bromine.
c) Lithium, Beryllium, and Bromine.
d) Boron, Fluorine, and Hydrogen.

6. What are the adverse effects of mercury on health?

a) Lung Cancer.
b) Damages kidneys and brain.
c) Softens bones.
d) Asthmatic bronchitis.

b) Damages kidneys and brain.

7. When did the E-waste (management and handling) rules, 2011 come into effect?

a) January 1, 2012
b) March 1, 2012
c) May 1, 2012.
d) July 1, 2012

c) May 1, 2012.

8. Which cities produce the highest e-waste in India?

a) Mumbai and Delhi.
b) Chennai and Vishakhapatnam
c) Kolkata and Patna

Mumbai and Delhi.

9. The component beryllium is mostly released from the E-waste of ____

a) Cathode Ray Tubes.
b) Computer plate.
c) Switch board.
d) Microchips.

c) Switch board.

Ozone Depletion – MCQ

Different Symbols used for Electrical Fittings and Installation

Acid Rain – MCQ

# Kyoto Protocol -MCQ || Environmental Engineering ||

## Kyoto Protocol -MCQ

1. What is the main aim of the Kyoto protocol?

a) To prevent ozone depletion.
b) To increase carbon dioxide emissions.
c) To reduce greenhouse gases.
d) To eradicate the use of CFCs and halons.

c) To reduce greenhouse gases.

2. When the Kyoto protocol was held for the first time?

a) December 1997.
b) November 1997.
c) December 1995.
d) November 1995.

a) December 1997.

3. Which countries rejected the idea that was tossed during the Kyoto protocol?

a) Russia, France, and Italy.
b) India, China, and USA.
d) Sweden, Pakistan, and Netherlands.

b) India, China and USA.

4. When did the Kyoto protocol came into force?

a) June 16, 2005.
b) January 16, 2005.
c) December 16, 2005.
d) February 16, 2005.

d) February 16, 2005.

5. What is the purpose of the “Clean Development Mechanism”?

a) To encourage developing nations to implement less carbon-emitting technology.
b) To encourage industrialized nations to transfer technology to the developing countries that would reduce carbon emissions.
c) To invest more money in carbon free methods of development.
d) None of the above.

b) To encourage industrialized nations to transfer technology to the developing countries that would reduce carbon emissions.

a) Trading of coal and diamonds.
b) Trading of less carbon emitting technology.
c) Trading of carbon dioxide emissions.
d) None of the above.

c) Trading of carbon dioxide emissions.

7. Certified emission reduction(CER) is equivalent to the emission of ____ of carbon dioxide.

a) 5 tonnes.
b) 1 tonne.
c) 11 tonnes.
d) 2 tonnes.

b) 1 tonne.

8. Which one of the following is not a very wise option for reducing carbon emissions?

a) using fly ash instead of cement.
b) Adoption of wind or solar energy.
c) Tree plantation.
d) Using thermal power plants for energy production.

d) Using thermal power plant for energy production.

9. What is India’s global ranking in the carbon credit list?

a) Fifth.
b) Second.
c) First.
d) Fifty-Six.

b) Second.

10. When did the Kyoto protocol actually expire?

a) 2021.
b) 2012.
c) 2020.
d) 2018.

c) 2020. (Second commitment ended)

But, the first commitment ended in 2012, after that it was extended up to 2020.

11. What was India’s total emission of greenhouse gases in 2019?

a) 1.23 BT.
b) 1.85 BT.
c) 1.97 BT.
d) 1.43 BT.

c) 1.97 BT.

12. What is India’s ranking in global greenhouse gas emissions?

a) First.
b) Second.
c) Third.
d) Fourth.

c) Third.

13. What is the role of the Designated Operational Entities(DOEs)?

a) To verify and ensure the carbon savings have indeed taken place.
b) To maintain standard equipment and technology according to the global standards.
c) To ensure proper regulations of human rights.
d) None of the above.

a) To verify and ensure the carbon savings have indeed taken place.

Montreal Protocol – MCQ || Environmental Engineering

10 Major Causes of Air Pollution

Primary and Secondary Air Pollutants

# Montreal Protocol – MCQ || Environmental Engineering

## Montreal Protocol – MCQ

1 What do you mean by Montreal Protocol?

a) It is a place in Montreal.
b) International Treaty for controlling ozone depletion.
c) It is a rulebook for sustainable development.
d) None of the above.

b) International Treaty for controlling ozone depletion.

2. When was the Montreal Protocol adopted?

a) 12 August 1987.
b) 01 June 1987.
c) 16 September 1987.
d) 17 October 1997.

c) 16 September 1987.

3. When did the London amendments were added to the original Montreal Protocol?

a) June, 1990.
b) April, 1990.
c) May, 1990.
d) July, 1990.

a) June, 1990.

4. On what conditions, India joined the Montreal Protocol, in 1992?

a) Fund of 240 million dollars was created for developing and poor nations
b) Developed countries were instructed to write an apology to the poor nations
c) HCFCs should be provided free of cost to the poor nations
d) None of the above

a) Fund of 240 million dollars was created for developing and poor nations.

5. What was the main aim of the Montreal Protocol?

a) To reduce the use of automobiles
b) To reduce the use of plastics
c) To reduce the emissions of Greenhouse gases
d) To reduce the production of ozone-destroying agents like CFCs and Halons.

d) To reduce the production of ozone-destroying agents like CFCs and Halons.

6. How many countries have become members of the Montreal protocol?

a) 120
b) 214
c) 197
d) 98

c) 197.

7. What was the deadline for developing countries to phase out the use of CFCs and halons?

a) January 1, 2010
b) January 1, 2005
c) January 1, 2008
d) January 1, 2006

a) January 1, 2010

Kyoto Protocol -MCQ

10 Major Causes of Air Pollution

Ozone Depletion – MCQ

# Ozone Depletion – MCQ || Environmental Engineering ||

## Ozone Depletion – MCQ

1. Which one of the following is considered as the most dreaded aspect of air pollution?

a) Ozone depletion.
b) Global warming.
c) Climate change.
d) Acid rain.

a) Ozone depletion.

Read Also: 10 Causes of Air Pollution.

2. What do you understand by the term ‘ozone depletion?

a) Reduction of ozone gas present in the atmosphere.
b) Reduction of industrial ozone production.
c) Reduction of the naturally available ozone layer.
d) None of the above.

c) Reduction of the naturally available ozone layer.

3. Which zone of the atmosphere is also known as the ozonosphere?

a) Thermosphere.
b) Stratosphere.
c) Troposphere.
d) Mesosphere.

b) Stratosphere.

4. Why the ozone layer is of the utmost importance for life on Earth?

a) Because ozone is essential for respiration.
b) Because plants need ozone for their survival.
c) Ozone is the ultimate source of energy.
d) Because it traps most of the UV radiation from the sun.

d) Because it traps most of the UV radiation from the sun.

5. What is the percentage of Nitrogen and Oxygen present in the Earth’s atmosphere?

a) 78% and 20%
b) 50% and 49%
c) 61% and 19%
d) 44% and 37%

a) 78% and 20%.

6. Why is the stratosphere quoted as the most important zone?

a) Because airplanes fly in this zone.
b) Because it contains ozone.
c) Because it has a very high temperature.
d) It allows precipitation.

b) Because it contains ozone.

7. Which of the following is not right about the UV radiation of the sun?

a) It is responsible for Typhoid.
c) It causes eye diseases.
d) It causes several skin cancers.

a) It is responsible for typhoid.

8. When and where was the first ozone depletion ever noticed?

a) Arctic, 1975
c) Antarctic region, 1985
d) Scotland, 1957
d) Greenland, 1998

c) Antarctic region, 1985

9. Which pollutant is most responsible for ozone depletion?

a) Methane
b) Chlorofluorocarbons.
c) Sulphur dioxide.
d) Carbon monoxide.

b) Chlorofluorocarbons.

10. Which countries are highly affected by ozone depletion?

a) Australia and Argentina
b) Brazil and Indonesia
c) Peru and Philipines

a) Australia and Argentina.

11. Which gas is solely responsible for the demolition of ozone?

a) Carbon dioxide
b) Methane
c) Argon
d) Chlorine monoxide

d) Chlorine monoxide.

12. What is the average thickness of the ozone layer?

a) 500 DU.
b) 450 DU.
c) 300 DU.
d) 200 DU.

c) 300 DU.

13. Which part of the earth experiences the thickest ozone layer (thickness 500 DU)?

a) Near the North Pole.
b) Around the equator.
c) Near the South Pole.
d) Near the Tropic of cancer.

15. What is an ‘ozone hole’?

a) Absence of ozone creating a hole in the ozone layer.
b) It is the region where the ozone layer ends and the Mesosphere starts.
c) It is the angle between the three oxygen atoms in an ozone molecule.
d) None of the above.

a) Absence of ozone creating a hole in the ozone layer.

16 It is believed that one chlorine atom can destroy ______ atoms of ozone.

a) 60,000
b) 100,000
c) 10,000
d) 90,000

b) 100,000

17. What is the most frightening fact about CFCs?

a) They are greenhouse gas.
b) They are responsible for ozone depletion.
c) After being emitted, they remain in the atmosphere for 100 years.
d) They are toxic.

c) After being emitted, they remain in the atmosphere for 100 years.

18. Which one of these is the most dangerous radiation from the sun?

a) UV-A
b) UV-B
c) Infrared
d) None of the above

b) UV-B

19. What is the concentration of ozone in the layer of the stratosphere?

a) 15 ppmv
b) 10 ppmv
c) 5 ppmv
d) 3 ppmv

b) 10 ppmv

Primary and Secondary Air Pollutants- And Their Examples

Global Warming and Climate Change – MCQ

Acid Rain – MCQ

# Global Warming and Climate Change – MCQ

## Global Warming and Climate Change – MCQ

1. What do you understand by the term “global warming”?

a) Melting of the glaciers.
b) Rise in temperature of the earth’s atmosphere.
c) Ozone layer depletion.
d) Depletion of natural resources.

b) Rise in temperature of the earth’s atmosphere.

2. Which option is false regarding greenhouse gases?

a) Greenhouse gases are necessary for our survival.
b) Earth’s atmosphere would be freezing without greenhouse gases.
c) Ozone is the most abundant greenhouse gas.
d) HCFCs are responsible for ozone layer depletion.

c) Ozone is the most abundant greenhouse gas.

3. According to the study by National Oceanic and Atmospheric Administration, how much did the ozone hole has shrunk from 2000 to 2015?

a) 5.4 M. sq. miles
b) 1 M. sq. miles
c) 2.5 M. sq. miles
d) 1.5 M. sq. miles

d) 1.5 M. sq. miles

4. Venus has _____ times more CO2 levels than that on earth.

a) 5000
b) 25,000
c) 60,000
d) 45,000

c) 60,000

5. Which year has experienced the largest yearly jump of atmospheric CO2 ever?

a) 1994-1995
b) 1997-1998
c) 1993-1994
d) 1947-1948

b) 1997-1998

6. What is the percentage(%) of the average yearly increase of CO2?

a) 0.25%
c) 0.0025%
d) 0.56%
e) 0.4%

d) 0.56%

7. Which layer of the atmosphere is most liable for the greenhouse effect?

a) Stratosphere
b) Troposphere
c) Ionosphere
d) Mesosphere

b) Troposphere.

8. What is the average rise in sea level per year?

a) 1.5 mm
b) 7.5 mm
c) 2.65 mm
d) 0.4 mm

a) 1.5 mm per year (From 1880 to 2013)

But, now this value is changed, at the present time the average rise in sea level per year is around 3.6 mm.

9. What percentage (%) of Indian soil is threatened to be submerged completely underwater in the near future

a) 6%
b) 12%
c) 4%
d) 5%

a) 6%

10. Which city in India will be adversely affected by the rising sea level?

a) Kolkata
b) Vizag
c) Chennai
d) Thiruvananthapuram

a) Kolkata

11. Which of the following is not responsible for global warming

a) Deforestation
b) Ocean Acidification
c) Fossil fuel combustion
d) None of these

b) Ocean Acidification.

12. Which one is not an appropriate option if you are trying to reduce global warming?

a) Recycling of products
b) Tree plantation
c) Increasing agricultural capacity by using fertilizers
d) Conserving water

c) Increasing agricultural capacity by using fertilizers.

13. Why the use of CNG is an intelligent option than petroleum and coal?

a) CNG reduces CO2 emissions
b) CNG reduces the use of automobiles
c) CNG contains ethane
d) CNG is found naturally

a) CNG reduces CO2 emissions.

14. Which region of India is facing the most drastic glacier retreat?

a) Hindu Kush Himalayas
b) Diamir Glacier
c) Bara Shigri Glacier
d) Chong Kumdan

a) Hindu Kush Himalayas

15. Which ocean has warmed faster than the global average?

a) Indian Ocean.
b) Pacific ocean.
c) Atlantic Ocean.
d) Arctic Ocean.

a) Indian Ocean.

16. Why ozone layer is important?

a) It helps in satellite communications.
b) It is used as a medication.
c) It does not allow air to escape into space.
d) It absorbs most of the UV-B radiation.

d) It absorbs most of the UV-B radiation.

Kyoto Protocol -MCQ

Acid Rain – MCQ

E-Waste – MCQ

10 Main Causes of Air Pollution

# Acid Rain – MCQ || Environmental Engineering ||

## Acid Rain – MCQ

1. Clean unpolluted rainwater is considered to be slightly acidic in nature. This slight acidity is caused by

a) Equilibrium reaction between H2O and CO2.
b) Due to the presence of SO2 and NOx gases.
c) Ozone depletion and Global warming.
d) None of the above.

a) Equilibrium reaction between H2O and CO2.

2. Point out the primary and secondary pollutants among the following: SO2, NO2, HNO3, CO, H2SO4, PANs

a) Primary: HNO3, SO2, PANs || Secondary: H2SO4, NO2, CO.
b) Primary: SO2, HNO3, H2SO4 || Secondary: NO2, PANs, CO.
c) Primary: CO, H2SO4, PANs || Secondary: SO2, NO2, HNO3.
d) Primary: SO2, NO2, CO || Secondary: HNO3, H2SO4, PANs.

d) Primary: SO2, NO2, CO || Secondary: HNO3, H2SO4, PANs

3. The rain is called acid rain when its pH value is

a) Slightly less than 7.
b) 7 or more than 7.
c) 5.6 or below.
d) Above 5.6.

c) 5.6 or below

4. SO2 is the primary pollutant of acid rain. Which one of the following reasons, is not appropriate for SO2 generation

a) Burning of coals.
b) Cutting of trees and deforestation.
c) Burning of petrol and diesel in automobiles.
d) Smoke from metal processing and smelting facilities.

b) Cutting of trees and deforestation.

5. In the case of industrialized countries, what is the proportion of man-made and natural emissions of SO2?

a) 9:1
b) 4:3
c) 1:1
d) 1:6

a) 9:1

6. Mankind has experienced acid rains almost 1,00,000 times more acidic than neutral ones (i.e. those having pH=2) in which part of the world?

a) Greenland and Amazon.
b) Northern Asia and Eastern Europe.
c) England and Scotland.
d) North-eastern US and Scotland.

d) North-eastern US and Scotland.

7. What was the incident that attracted attention towards Norway and Sweden regarding the Acid rain aspect?

a) Birds were migrating to warmer places.
b) Fish populations in lakes were found to be decreasing drastically.
c) Crops started to die.
d) People started falling ill.

b) Fish population in lakes were found to be decreasing drastically.

8. Which city in India has experienced acid rain in the late 1970s and 80s?

a) Kochi.
b) Agra.
c) Chembur.
d) Bhubaneswar.

c) Chembur.

9. Which of the following equipment is effective in checking SO2 and NO2 emissions?

a) Three-way catalytic converters
b) Use of industrial storage tanks
c) Mechanical dust collector
d) Air Lock Valves

a) Three-way catalytic converters.

10. When and where the first acid rain in India was reported

a) 1972 in Agartala.
b) 1974 in Agra.
c) 1974 in Chembur.
d) 1972 in Birhati.

c) 1974 in Chembur.

11. European countries like Sweden contain 0.001% sulfur by weight. What is the percentage(%) of sulfur in Indian diesel supplies, except Delhi and Agra?

a) 0.125%
b) 0.75%
c) 0.9%
d) 0.5%

d) 0.5%

But in the case of Delhi and Agra, it is 0.25%.

12. Which of the following primary pollutant is liable for 1/3rd of acid rain

a) SO2
b) NOx
C) CO
D) VOCs

b) NOx (Nitrogen Oxides)

13. Which of the following primary pollutant is responsible for 2/3rd of acid rain

a) SO2
b) NOx
C) CO
D) VOCs