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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

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

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Environmental Engineering in CE
Dust collection efficiency of a cyclone separator depends upon its

Diameter
Inlet gas velocity
All of these
Overall height

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Environmental Engineering in CE
Dose of chlorine for disinfection of water is about __________ mg/litre of water.

0.3
0.1
1
0.01

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Environmental Engineering in CE
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan

Both A & B
Of increased diameter
With greater number of blades
Neither A nor B

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Environmental Engineering in CE
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m³.(μg-microgram)

800
750
90
10

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Environmental Engineering in CE
Nitrogen oxides (NOx) is not produced in the __________ industry.

Detergent
Nitrogenous fertiliser
Nitric acid making
Any of these

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