Chemical Environmental Engineering

Which of the following processes is involved in the biochemical treatment of sewage effluents ?

Byadmin March 11, 2019August 29, 2021

Which of the following processes is involved in the biochemical treatment of sewage effluents ?

A. Oxidation
B. Reduction
C. Dehydration
D. Fermentation

Chemical Environmental Engineering

TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?

TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?

A. Skin disorder
B. Bronchitis
C. Bone disease
D. Cancer

Read More TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?
Chemical Environmental Engineering

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?

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?

A. Hydrogen
B. Carbon dioxide
C. Ozone
D. None of these

Read More 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?
Chemical Environmental Engineering

Disinfection of water is done to remove ______________________?

Disinfection of water is done to remove ______________________?

A. Color
B. Bad taste
C. Foul odour
D. Bacteria

Read More Disinfection of water is done to remove ______________________?
Chemical Environmental Engineering

Presence of bacteria in potable (drinking) water causes_________________?

Presence of bacteria in potable (drinking) water causes_________________?

A. Turbidity
B. Disease
C. Bad odour
D. Bad taste & colour

Read More Presence of bacteria in potable (drinking) water causes_________________?
Chemical Environmental Engineering

Which of the following is not a practical method of low level radioactive waste disposal ?

Which of the following is not a practical method of low level radioactive waste disposal ?

A. Dilution with inert material
B. Discharging to atmosphere through tall stacks after dilution
C. Disposing off in rivers & oceans
D. Filling in steel crates and shooting it off out of earth’s gravity

Read More Which of the following is not a practical method of low level radioactive waste disposal ?
Chemical Environmental Engineering

Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?

Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?

A. Biological oxygen pond
B. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
C. Lagoons
D. Filtration

Read More Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?

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