Environmental Engineering in CE MCQs

Question 1

The common pollutant generated in chlor-alkali industry and battery manufacture is

Accepted Answer

Mercury

Answer

Brine

Answer

Phosphate

Answer

None of these

Question 2

Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

Accepted Answer

Chemical coagulation

Answer

Floatation & skimming

Answer

Centrifugation

Answer

Ultrafiltration

Question 3

Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?

Accepted Answer

Acetylene

Answer

Hydrogen

Answer

Carbon monoxide

Answer

Ammonia

Question 4

The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.

Accepted Answer

Dissolved oxygen content

Answer

Biological oxygen demand

Answer

Vapor pressure

Answer

All of the above

Question 5

The pH value of oxidised sewage is about

Accepted Answer

7.3

Answer

1.8

Answer

6.2

Answer

13.4

Question 6

Industrial workers working in leather tanning & manufacturing units are prone to suffer from

Accepted Answer

Skin diseases (e.g. dermatities)

Answer

Respirtory ailments (e.g. bronchitis)

Answer

Silicosis

Answer

Blurred vision

Question 7

Which of the following acts as a natural source of air pollution?

Accepted Answer

Volcanic eruption

Answer

Forest fire

Answer

Deforestation

Answer

None of these

Question 8

Which of the following is not a natural source of air pollution?

Accepted Answer

None of these

Answer

Volcanic eruptions and lightening discharges

Answer

Biological decay of vegetable matter

Answer

Photochemical oxidation of organic matter

Question 9

Which of the following is the most detrimental for water used in high pressure boiler?

Accepted Answer

Silica

Answer

Turbidity

Answer

Phenol

Answer

Dissolved oxygen