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Environmental Engineering in CE

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)

90
750
10
800

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Environmental Engineering in CE
COD of raw municipal sewage may be in the range of about __________ mg/litre.

5-10
1-2
90-120
1500-2500

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Environmental Engineering in CE
Salt content in sea water is about __________ percent.

0.5
1
3.5
10

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Environmental Engineering in CE
Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by

Chemical coagulation
Chlorination
None of these
Treating in biological oxygen pond

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Environmental Engineering in CE
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.

200
140
120
170

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Environmental Engineering in CE
A man exposed to excessive noise level in the working environment may suffer from

Nervousness & fatigue
Rupture of ear drum
Hearing loss
All of these

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