Chemical Environmental Engineering

The maximum CO2 is emitted into the atmosphere by_________________?

Byadmin March 11, 2019August 29, 2021

The maximum CO2 is emitted into the atmosphere by_________________?

A. Combustion
B. Urea
C. Biomass burning
D. Trees

Chemical Environmental Engineering

The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?

The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?

A. Dissolved oxygen content
B. Biological oxygen demand
C. Vapor pressure
D. All A., B. and C.

Read More The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?
Chemical Environmental Engineering

____________ is removed from water by lime-soda process?

____________ is removed from water by lime-soda process?

A. Foul smell and taste
B. Iron and manganese
C. Temporary hardness
D. Permanent hardness

Read More ____________ is removed from water by lime-soda process?
Chemical Environmental Engineering

TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?

TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?

A. 0.1
B. 25
C. 100
D. 1000

Read More TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?
Chemical Environmental Engineering

Which of the following is the most severe air pollutant ?

Which of the following is the most severe air pollutant ?

A. Hydrocarbons
B. NOx
C. SO2
D. CO

Read More Which of the following is the most severe air pollutant ?
Chemical Environmental Engineering

Iron & manganese present as pollutant in water cannot be removed by__________________?

Iron & manganese present as pollutant in water cannot be removed by__________________?

A. Ion exchange process
B. Oxidation followed by settling & filtration
C. Lime soda process or manganese zeolite process
D. Chlorination

Read More Iron & manganese present as pollutant in water cannot be removed by__________________?
Chemical Environmental Engineering

For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?

For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?

A. 10000
B. 5
C. 500
D. 1000

Read More For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?

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