Chemical Environmental Engineering

Aerosols present in atmospheric air may be__________________?

Byadmin March 11, 2019August 29, 2021

Aerosols present in atmospheric air may be__________________?

A. Positively charged
B. Negatively charged
C. Neutral
D. Combination of all A., B. & C.

Chemical Environmental Engineering

A shallow pond in which the sewage is retained and biologically treated is called__________________?

A shallow pond in which the sewage is retained and biologically treated is called__________________?

A. Oxidation
B. Imhoff tank
C. Lagoon
D. Skimming tank

Read More A shallow pond in which the sewage is retained and biologically treated is called__________________?
Chemical Environmental Engineering

The maximum CO2 is emitted into the atmosphere by_________________?

The maximum CO2 is emitted into the atmosphere by_________________?

A. Combustion
B. Urea
C. Biomass burning
D. Trees

Read More The maximum CO2 is emitted into the atmosphere by_________________?
Chemical Environmental Engineering

The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?

The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?

A. Ionosphere
B. Troposphere
C. Stratosphere
D. None of these

Read More The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?
Chemical Environmental Engineering

Green house effect is accentuated by________________?

Green house effect is accentuated by________________?

A. Deforestation
B. Rapid industrialisation
C. Increased transportation activity
D. All A., B. and C.

Read More Green house effect is accentuated by________________?
Chemical Environmental Engineering

TLV of lead for public sewer/waste water is about ______________ ppm?

TLV of lead for public sewer/waste water is about ______________ ppm?

A. 1
B. 25
C. 150
D. 650

Read More TLV of lead for public sewer/waste water is about ______________ ppm?
Chemical Environmental Engineering

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?

A. Fading of dyes on textiles
B. Corrosion, tarnishing & soiling of metals
C. Reduced strength of textiles
D. All A., B. and C.

Read More Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?

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