The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

Environmental Engineering in CE
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

May increase or decrease ; depends on the chemical characteristics of polluted water

Remains constant

Decreases

Increases

May increase or decrease ; depends on the chemical characteristics of polluted water

Remains constant

Decreases

Increases

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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.

160

135

105

185

160

135

105

185

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Environmental Engineering in CE
World's worst radioactive pollution was caused by nuclear reactor disaster which occured in

Moscow (U.S.S.R.)

Chernobyl (undivided U.S.S.R.)

Arizona (U.S.A.)

Pensylvania (U.S.A.)

Moscow (U.S.S.R.)

Chernobyl (undivided U.S.S.R.)

Arizona (U.S.A.)

Pensylvania (U.S.A.)

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Environmental Engineering in CE
Beyond what concentration of H₂S in air, acute danger to human life exists?

300 ppm

100 ppm

50 ppm

700 ppm

300 ppm

100 ppm

50 ppm

700 ppm

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Environmental Engineering in CE
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes

Gastritis & diarrhea

Paralysis of muscles & loss of appetite

All of these

Nervous depression

Gastritis & diarrhea

Paralysis of muscles & loss of appetite

All of these

Nervous depression

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Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

Heavy metals and cynides

Suspended solids

All of these

Soluble and toxic organics

Heavy metals and cynides

Suspended solids

All of these

Soluble and toxic organics

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Environmental Engineering in CE

Environmental Engineering in CE The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

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.

Environmental Engineering in CE World's worst radioactive pollution was caused by nuclear reactor disaster which occured in

Environmental Engineering in CE Beyond what concentration of H₂S in air, acute danger to human life exists?

Environmental Engineering in CE Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes

Environmental Engineering in CE Presence of __________ in water stream are deleterious to aquatic life.

Environmental Engineering in CE
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

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.

Environmental Engineering in CE
World's worst radioactive pollution was caused by nuclear reactor disaster which occured in

Environmental Engineering in CE
Beyond what concentration of H₂S in air, acute danger to human life exists?

Environmental Engineering in CE
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes

Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.