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Environmental Engineering in CE

Environmental Engineering in CE
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.

Mercury
Hydrogen sulphide
Cadmium
Asbestos

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Environmental Engineering in CE
Which of the following is not a weightless pollutant?

Radioactive rays
Thermal pollution
SPM
Noise pollution

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Environmental Engineering in CE
The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel.

10
20
5
1

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Environmental Engineering in CE
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.

Ozone
Hydrogen
Carbon dioxide
None of these

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Environmental Engineering in CE
Which of the following is not a natural source of air pollution?

None of these
Volcanic eruptions and lightening discharges
Photochemical oxidation of organic matter
Biological decay of vegetable matter

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Environmental Engineering in CE
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?

Idle running
Acceleration
Cruising
Deaccelaration

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