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Environmental Engineering in CE

Environmental Engineering in CE
Removal of __________ is accomplished by aeration of water.

Dissolved gases
Dissolved solids
Suspended solids
None of these

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Environmental Engineering in CE
Dissolved oxygen content in river water is around __________ ppm.

100
500
250
5

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Environmental Engineering in CE
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.

Lead
Arsenic
Fluoride
Mercury

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Environmental Engineering in CE
Septic tank is a(i) Settling tank(ii) Digestion tank(iii) Aeration tank

(i) and (iii)
Only (i)
Only (iii)
(i) and (ii)

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Environmental Engineering in CE
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.

50
3000 (i.e. 0.3%)
500
1000

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Environmental Engineering in CE
In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

t = 15 - 0.0035h
t = 0.0035h -15
t = 15 + 0.0065h
t = 15 - 0.0065h

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