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Environmental Engineering in CE

Environmental Engineering in CE
Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.

120
150
180
90

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Environmental Engineering in CE
Which of the following is a secondary air pollutant?

Nitrogen dioxide
Sulphur dioxide
Dust particles
Photochemical smog

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Environmental Engineering in CE
Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

75
95
120
140

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Environmental Engineering in CE
Hardy cross method of analysis of distribution system(i) Involves successive trials(ii) Takes economic aspects into account(iii) Is time consuming

Only (i)
All are correct
(i) and (iii)
(i) and (ii)

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Environmental Engineering in CE
Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the

Electrostatic precipitator
Gravity settling chamber
Bag filter
Cyclone separator

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Environmental Engineering in CE
Disinfection of water is done to remove

Bacteria
Color
Foul odour
Bad taste

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