The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?

Byadmin March 11, 2019August 29, 2021

The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?

A. Chlorine
B. Alkalis
C. Benzene hexachloride
D. Alkyl benzene sulphonate (ABS)

Chemical Environmental Engineering

Water filtration rate in a rapid sand filter ranges from ______________ kilolitres/m2/hr?

Water filtration rate in a rapid sand filter ranges from ______________ kilolitres/m2/hr?

A. 0.1 to 1
B. 3 to 6
C. 10 to 15
D. 15 to 20

Read More Water filtration rate in a rapid sand filter ranges from ______________ kilolitres/m2/hr?
Chemical Environmental Engineering

A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?

A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?

A. Global warming
B. Green house
C. Atmospheric effect
D. Ionosphere

Read More A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?
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

Which of the following is a secondary air pollutant ?

Which of the following is a secondary air pollutant ?

A. Photochemical smog
B. Sulphur dioxide
C. Nitrogen dioxide
D. Dust particles

Read More Which of the following is a secondary air pollutant ?
Chemical Environmental Engineering

Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?

Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?

B. Cooling and freezing of water kills the bacteria present in it
C. With increasing boiler operating pressure of steam, the maximum allowable concentration of
silica in feed water goes on decreasing
D. Dissolved oxygen content in high pressure boiler feed water should be nil

Read More Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?
Chemical Environmental Engineering

COD of raw municipal sewage may be in the range of about _____________ mg/litre?

COD of raw municipal sewage may be in the range of about _____________ mg/litre?

A. 1-2
B. 5-10
C. 90-120
D. 1500-2500

Read More COD of raw municipal sewage may be in the range of about _____________ mg/litre?

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