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Environmental Engineering in CE

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

250
500
5
100

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

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Environmental Engineering in CE
Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m²/hr.

0.1 to 1
15 to 20
10 to 15
3 to 6

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Environmental Engineering in CE
TLV of aldrin in public water supply system is about __________ μg/litre.

1097
357
17
0.5

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Environmental Engineering in CE
The widest explosive limit is of __________ , thereby making it the most explosive gas.

Hydrogen
Petrol vapor
Acetylene
Carbon monoxide

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Environmental Engineering in CE
Which of the following plants does not emit appreciable amount of SO₂ in atmosphere?

Thermal power plant
Petroleum refinery
Nitric acid plant
Sulphuric acid plant

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