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Environmental Engineering

Environmental Engineering
Which of the following chemical compounds can be used for de-chlorination of water?

Bleaching powder
Carbon dioxide
Chloramines
Sulphur dioxide

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Environmental Engineering
The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is

Hardy cross method
Circle method
Electrical analysis method
Equivalent pipe method

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Environmental Engineering
Sewage treatment units are designed for

Average flow only
Maximum and minimum flow
Maximum flow only
Minimum flow only

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Environmental Engineering
Most suitable section of sewer in separate sewage system is

Standard form of egg shaped sewer
Rectangular section
Modified egg shaped section
Circular section

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Environmental Engineering
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

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

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Environmental Engineering
A pipe which is installed in the house drainage to preserve the water seal of traps is called

Waste pipe
Soil pipe
Vent pipe
Anti-siphonage pipe

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