Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by_________________?

Byadmin March 11, 2019August 29, 2021

Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by_________________?

A. Quenching of hot coke
B. Discharging in the river stream
C. Filtration and recycling for cooling coke oven gas
D. None of these

Chemical Environmental Engineering

Out of the following, TLV of _______________ is maximum (about 500 ppm)?

Out of the following, TLV of _______________ is maximum (about 500 ppm)?

A. Carbon dioxide
B. Toluene
C. Carbon disulphide
D. Acetaldehyde

Read More Out of the following, TLV of _______________ is maximum (about 500 ppm)?
Chemical Environmental Engineering

Higher concentration of CO2 in atmosphere_____________________?

Higher concentration of CO2 in atmosphere_____________________?

A. Allows visible solar radiation (ultraviolet) of short wave-length to pass through
B. Reflects and absorbs the longer wavelength (infra-red) radiations
C. Prevents solar heat being radiated out completely, resulting in ‘heat trap’ i.e., global warming
D. All A., B. and C.

Read More Higher concentration of CO2 in atmosphere_____________________?
Chemical Environmental Engineering

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

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

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

Persons working in cement plants and limestone quarries are more prone to disease like__________________?

Persons working in cement plants and limestone quarries are more prone to disease like__________________?

A. Cancer
B. Asthma
C. Silicosis
D. Fluorosis (bone disease)

Read More Persons working in cement plants and limestone quarries are more prone to disease like__________________?
Chemical Environmental Engineering

Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?

Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?

A. Ozone and iodine
B. Chlorine or its compounds
C. Ultraviolet light for irradiation of water
D. All A., B. & C.

Read More Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?
Chemical Environmental Engineering

In a sedimentation tank, the detention period for water ranges from _____________ hours?

In a sedimentation tank, the detention period for water ranges from _____________ hours?

A. 2 to 4
B. 8 to 12
C. 16 to 20
D. 24 to 32

Read More In a sedimentation tank, the detention period for water ranges from _____________ hours?

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