A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called___________________?

Byadmin March 11, 2019August 29, 2021

A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called___________________?

A. Cesspool
B. Lagoon
C. Skimming mill
D. Septic tank

Chemical Environmental Engineering

Tri-sodium phosphate is used in boiler water treatment to reduce____________________?

Tri-sodium phosphate is used in boiler water treatment to reduce____________________?

A. Turbidity
B. Caustic embrittlement
C. Suspended silica
D. Dissolved oxygen

Read More Tri-sodium phosphate is used in boiler water treatment to reduce____________________?
Chemical Environmental Engineering

Noise pollution level in a chemical plant is expressed in __________________?

Noise pollution level in a chemical plant is expressed in __________________?

A. Roentgen
B. Decibel
C. Hertz
D. None of these

Read More Noise pollution level in a chemical plant is expressed in __________________?
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_________________?

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.

Read More 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

Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?

Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?

A. Grinding
B. Machining
C. Cutting
D. Polishing

Read More Pollution by particulate matter emission in the atmosphere does not take place during metal____________________?
Chemical Environmental Engineering

Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?

Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?

A. Lagooning
B. Activated carbon adsorption
C. Biological oxidation pond
D. Chemical coagulation

Read More Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?
Chemical Environmental Engineering

Exposure to chemicals having carcinogenic properties cause ____________________?

Exposure to chemicals having carcinogenic properties cause ____________________?

A. Dermatitis (skin disorder)
B. Cancer
C. Asphyxiation (suffocation)
D. Asthma

Read More Exposure to chemicals having carcinogenic properties cause ____________________?

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