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Environmental Engineering in CE

Environmental Engineering in CE
Most of the bacteria in sewage are

Anerobic
Parasitic
None of these
Saprophytic

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Environmental Engineering in CE
Global warming may result in

Flood
All of these
Cyclone
Decrease in food productivity

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Environmental Engineering in CE
Ozone level is generally found to be depleted in India in the month of

February
December
July
April

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Environmental Engineering in CE
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

70
3
30
100

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Environmental Engineering in CE
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of Nā‚‚ in contaminated air at which it acts as a natural asphyxant is ≄ __________ percent.

80
84
92
88

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Environmental Engineering in CE
Pick out the wrong statement pertaining to 'green house' for the plants.

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