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Environmental Engineering in CE

Environmental Engineering in CE
Maximum permissible turbidity in potable water is __________ ppm.

1000
250
10
1

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Environmental Engineering in CE
Disinfection of water is done to remove

Color
Bacteria
Foul odour
Bad taste

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Environmental Engineering in CE
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.

Hydrogen
Carbon dioxide
Ozone
None of these

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Environmental Engineering in CE
Solid content in most of the domestic sewage is about __________ percent.

0.001
5
10
0.1

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Environmental Engineering in CE
As compared to rapid sand filters, slow sand filters give
(i) Slower filtration rate
(ii) Higher filtration rate
(iii) Lesser efficiency in removal of bacteria
(iv) Higher efficiency in removal of bacteria
The correct answer is

(ii) and (iv)
(i) and (iv)
(i) and (ii)
(ii) and (iii)

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

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