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Chemical Environmental Engineering

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

Chemical Environmental Engineering /
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

A. Sedimentation tank
B. Circular clarifier
C. Mechanical flocculation
D. Chemical coagulation

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ? Read More »

Chemical Environmental Engineering

Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?

Chemical Environmental Engineering /
Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?

A. 100
B. 1000
C. 400
D. 4000

Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres? Read More »

Chemical Environmental Engineering

Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________?

Chemical Environmental Engineering /
Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________?

A. Poor visibility due to sky darkening
B. Irritation in eyes
C. Respiratory trouble
D. All A., B. and C.

Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________? Read More »

Chemical Environmental Engineering

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?

Chemical Environmental Engineering /
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?

A. Forestation
B. Rain
C. Green house effect
D. Vegetation

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________? Read More »

Chemical Environmental Engineering