Cesspool
Lagoon
Skimming mill
Septic tank
✅ The correct answer is option D.
Enviornmental Engineering MCQs
Pollution by particulate matter emission in the atmosphere does not take place during metal
Grinding
Machining
Cutting
Polishing
✅ The correct answer is option D.
Which of the following is not a weightless pollutant?
SPM
Thermal pollution
Radioactive rays
Noise pollution
✅ The correct answer is option A.
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.
Radioactive
Organic
Inorganic
None of these
✅ The correct answer is option C.
Arsenic pollutant is not generated in____industries.
Tanneries
Glass & ceramic
Beverages
Any of these
✅ The correct answer is option C.
Iron & manganese present as pollutant in water can not be removed by
Ion exchange process
Oxidation followed by settling & filtration
Lime soda process or manganese zeolite process
Chlorination
✅ The correct answer is option D.
Out of the following, TLV of __________ is the minimum (about 0.02 ppm).
Phosgene
Bromine
MIC (methyl iso-cynate)
Ozone
✅ The correct answer is option C.
Removal of __________ results from the disinfection of water.
Turbidity
Odour
Hardness
Bacteria
✅ The correct answer is option D.
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
With greater number of blades
Of increased diameter
Both A & B
Neither A nor B
✅ The correct answer is option C.
TLV of lead for public sewer/waste water is about __________ ppm.
1
25
150
650
✅ The correct answer is option A.