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Environmental Engineering

Environmental Engineering
Orthotolidine test is used for determination of

Dissolved oxygen
Dose of coagulant
Residual chlorine
Biochemical oxygen demand

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Environmental Engineering
Chlorine demand of water is equal to

Applied chlorine
Difference of applied and residual chlorine
Residual chlorine
Sum of applied and residual chlorine

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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
Anti-siphonage pipe
Vent pipe

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

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

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Environmental Engineering
The population of a town in three consecutive years are 5000, 7000 and 8400 respectively. The population of the town in the fourth consecutive year according to geometrical increase method is

10920
9800
9500
10100

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Environmental Engineering
In facultative stabilization pond, the sewage is treated by

Dual action of aerobic bacteria and anaerobic bacteria
Algae only
Aerobic bacteria only
Sedimentation

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