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Environmental Engineering in CE

Environmental Engineering in CE
The term Biological Oxygen Demand (BOD) is used in relation to

Potable water
Industrial effluents
Distilled water
Cooling water

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Environmental Engineering in CE
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.

105
160
185
135

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Environmental Engineering in CE
Septic tanks are used for the __________ of the deposited solids.

None of these
Anaerobic decomposition
Separation
Aerobic decomposition

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

All of these
Total solids
Turbidity
Color (Hazen)

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Environmental Engineering in CE
Pollution by particulate matter emission in the atmosphere does not take place during metal

Polishing
Cutting
Machining
Grinding

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Environmental Engineering in CE
Deaeration of high pressure boiler feed water is done to reduce

Caustic embrittlement
Its silica content
Its dissolved oxygen content
Foaming from boilers

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