Chemical Environmental Engineering

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

Byadmin March 11, 2019August 29, 2021

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

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

Chemical Environmental Engineering

Iron & manganese present in the polluted water is removed by __________________?

Iron & manganese present in the polluted water is removed by __________________?

A. Simple filtration
B. Oxidation followed by settling & filtration
C. Chemical coagulation
D. Chlorination only

Read More Iron & manganese present in the polluted water is removed by __________________?
Chemical Environmental Engineering

Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________________?

Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________________?

A. Grit
B. Dust
C. Powder
D. Smoke

Read More Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called__________________?
Chemical Environmental Engineering

Global warming may result in __________________?

Global warming may result in __________________?

A. Flood
B. Cyclone
C. Decrease in food productivity
D. All A., B. and C.

Read More Global warming may result in __________________?
Chemical Environmental Engineering

High noise level in a chemical plant can be controlled by the_________________?

High noise level in a chemical plant can be controlled by the_________________?

A. Suppression of noise at the source itself
B. Path control of noise
C. Protection of operating personnel
D. All A., B. & C.

Read More High noise level in a chemical plant can be controlled by the_________________?
Chemical Environmental Engineering

The main type of sludge gas evolved during sewage treatment in Imhoff tank is___________________?

The main type of sludge gas evolved during sewage treatment in Imhoff tank is___________________?

A. CO2
B. CH4
C. CO
D. H2

Read More The main type of sludge gas evolved during sewage treatment in Imhoff tank is___________________?
Chemical Environmental Engineering

Ozone is__________________?

Ozone is__________________?

A. A primary pollutant
B. A secondary pollutant
C. Impervious to ultra-violet rays
D. Both B. and C.

Read More Ozone is__________________?

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