The Following Section consists of Multiple Choice Questions on Environmental Engineering.
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Environmental Engineering MCQ
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Question 1 of 20
1. Question
1 pointsSuspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
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Question 2 of 20
2. Question
1 pointsPersons working in cement plants and limestone quarries are more prone to disease like
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Question 3 of 20
3. Question
1 pointsParticulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called
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Question 4 of 20
4. Question
1 pointsOperating principle of cyclone separator is based on the action of __________ dust particles.
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Question 5 of 20
5. Question
1 pointsExposure to small amount of __________ results in high blood pressure & heart disease in human beings.
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Question 6 of 20
6. Question
1 pointsTolerable limit of nitrogen oxides in air is __________ ppm.
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Question 7 of 20
7. Question
1 pointsIron & manganese present as pollutant in water can not be removed by
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Question 8 of 20
8. Question
1 pointsIn water chemical treatment plant, use of chloramines ensures
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Question 9 of 20
9. Question
1 pointsDuring which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
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Question 10 of 20
10. Question
1 pointsFluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.
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Question 11 of 20
11. Question
1 pointsExposure to chemicals having carcinogenic properties cause
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Question 12 of 20
12. Question
1 pointsNoise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
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Question 13 of 20
13. Question
1 pointsTLV of mercury in potable (drinking) water is about __________ ppm.
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Question 14 of 20
14. Question
1 pointsWhich is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)?
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Question 15 of 20
15. Question
1 pointsWhich is a secondary air pollutant ?
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Question 16 of 20
16. Question
1 pointsWhich of the following is the most detrimental for water used in high pressure boiler ?
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Question 17 of 20
17. Question
1 pointsTurbidity of water is an indication of the presence of
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Question 18 of 20
18. Question
1 pointsPresence of excess flourine in water causes
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Question 19 of 20
19. Question
1 pointsSiderosis is a disease caused by the inhalation of __________ dust.
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Question 20 of 20
20. Question
1 pointsThe main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by
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Environmental Engineering MCQ 2
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Question 1 of 20
1. Question
1 pointsPhenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by
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Question 2 of 20
2. Question
1 pointsWhich of the following dust collection equipments is the least efficient (for sub-micronic particles) ?
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Question 3 of 20
3. Question
1 pointsIonisation potential employed in the industrial electrostatic precipitator is of the order of
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Question 4 of 20
4. Question
1 pointsThe widest explosive limit is of __________ , thereby making it the most explosive gas.
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Question 5 of 20
5. Question
1 pointsPolluted water having low BOD are most economically treated in
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Question 6 of 20
6. Question
1 pointsTri-sodium phosphate is used in boiler water treatment to reduce
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Question 7 of 20
7. Question
1 pointsThe commonest form of iron & manganese found in ground water as pollutant is in the form of their
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Question 8 of 20
8. Question
1 points80% less than 200 mesh size particles are called
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Question 9 of 20
9. Question
1 pointsCoal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
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Question 10 of 20
10. Question
1 pointsMost of the atmospheric air pollutants are present in large quantity in
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Question 11 of 20
11. Question
1 pointsPick out the wrong statement.
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Question 12 of 20
12. Question
1 points‘Pneumoconiosis’ is a disease caused by the inhalation of __________ dust.
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Question 13 of 20
13. Question
1 pointsThe ratio of oxygen available to the oxygen required for stabilisation of sewage is called the
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Question 14 of 20
14. Question
1 pointsPick out the wrong statement.
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Question 15 of 20
15. Question
1 pointsMost efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the
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Question 16 of 20
16. Question
1 pointsThe concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
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Question 17 of 20
17. Question
1 pointsThe main industrial source of emission of hydrogen sulphide air pollutant is
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Question 18 of 20
18. Question
1 pointsWaste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
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Question 19 of 20
19. Question
1 pointsSound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.
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Question 20 of 20
20. Question
1 pointsWorld’s worst radioactive pollution was caused by nuclear reactor disaster which occured in
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Environmental Engineering MCQ 3
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Question 1 of 20
1. Question
1 pointsDissolved oxygen content in river water is around __________ ppm.
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Question 2 of 20
2. Question
1 pointsOil and grease present in an emulsified state in waste water discharged from industries can be removed by
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Question 3 of 20
3. Question
1 pointsThe amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
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Question 4 of 20
4. Question
1 pointsPresence of bacteria in potable (drinking) water causes
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Question 5 of 20
5. Question
1 pointsMaximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
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Question 6 of 20
6. Question
1 pointsIndustrial workers working in leather tanning & manufacturing units are prone to suffer from
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Question 7 of 20
7. Question
1 pointsPeroxyacyl nitrate (PAN), a pollutant is found in the
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Question 8 of 20
8. Question
1 pointsAmbient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
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Question 9 of 20
9. Question
1 pointsPick out the wrong statement.
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Question 10 of 20
10. Question
1 pointsWhich of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
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Question 11 of 20
11. Question
1 pointsCOD of raw municipal sewage may be in the range of about __________ mg/litre.
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Question 12 of 20
12. Question
1 pointsMaximum permissible turbidity in potable water is __________ ppm.
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Question 13 of 20
13. Question
1 pointsPresence of __________ hardness is responsible for the temporary hardness in water.
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Question 14 of 20
14. Question
1 pointsDose of chlorine for disinfection of water is about __________ mg/litre of water.
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Question 15 of 20
15. Question
1 pointsA shallow pond in which the sewage is retained and biologically treated is called
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Question 16 of 20
16. Question
1 pointsWhich is the most practical and economical method for removal of suspended solid matter from polluted water ?
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Question 17 of 20
17. Question
1 pointsAtmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
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Question 18 of 20
18. Question
1 pointsIron & manganese present in the polluted water is removed by
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Question 19 of 20
19. Question
1 pointsWater effluent generated in printing industry is decolourised by
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Question 20 of 20
20. Question
1 pointsThermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
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Environmental Engineering MCQ 4
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Question 1 of 20
1. Question
1 points__________ can not control the noise pollution.
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Question 2 of 20
2. Question
1 pointsOzone level is generally found to be depleted in India in the month of
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Question 3 of 20
3. Question
1 points‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a ‘particulate’ ?
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Question 4 of 20
4. Question
1 pointsFoul odour and bad taste of water is removed by treating with
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Question 5 of 20
5. Question
1 pointsMethyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.
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Question 6 of 20
6. Question
1 pointsNoise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.
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Question 7 of 20
7. Question
1 pointsPresence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause
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Question 8 of 20
8. Question
1 pointsPresence of soluble organics in polluted water causes
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Question 9 of 20
9. Question
1 pointsIn water treatment plant, zeolite process is used to remove the __________ of water.
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Question 10 of 20
10. Question
1 pointsFor existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
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Question 11 of 20
11. Question
1 pointsFresh sewage is __________ in nature.
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Question 12 of 20
12. Question
1 pointsIn a sedimentation tank, the detention period for water ranges from __________ hours.
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Question 13 of 20
13. Question
1 pointsWorkers working in __________ industry are most prone to white lung cancer.
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Question 14 of 20
14. Question
1 pointsA standard test for determination of hardness in water is termed as __________ test.
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Question 15 of 20
15. Question
1 pointsTLV of lead for public sewer/waste water is about __________ ppm.
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Question 16 of 20
16. Question
1 pointsPresence of nitrates in water in excess of 50 ppm causes
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Question 17 of 20
17. Question
1 pointsIn sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.
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Question 18 of 20
18. Question
1 pointsCoal mines drainage waste water (acidic in nature) results from the earth’s water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
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Question 19 of 20
19. Question
1 pointsFine grit present in sewage is removed in the __________ during sewage treatment.
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Question 20 of 20
20. Question
1 pointsThe lowest layer of atmosphere is known as the
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