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Environmental Engineering in CE

Environmental Engineering in CE
Ionisation potential employed in the industrial electrostatic precipitator is of the order of

230 V AC
30 to 70 kV DC
230 V DC
30 to 70 kV AC

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Environmental Engineering in CE
Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.

Color (Hazen)
Total solids
All of these
Turbidity

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Environmental Engineering in CE
Fine grit present in sewage is removed in the __________ during sewage treatment.

Detritus tank
Trickling filter
Skimming tank
Grit chamber

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Environmental Engineering in CE
Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

Dental cavities
Scale formation
Corrosion
Water-borne disease

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Environmental Engineering in CE
Maximum permissible residual chlorine in treated water should be __________ mg/litre.

02 to 0.3
0.001 to 0.01
5 to 10
2 to 3

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Environmental Engineering in CE
In the context of the chemical process industries, the term BOD is normally associated with the

Characterisation of solid wastes
Organic concentration in gaseous effluents
Characterisation of boiler feed water
Characterisation of liquid effluents

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