Chemical Environmental Engineering

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

Byadmin March 11, 2019August 29, 2021

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

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

Chemical Environmental Engineering

In water treatment, alum [Al2(SO4)3] is used for the process of __________________?

In water treatment, alum [Al2(SO4)3] is used for the process of __________________?

A. Filtration
B. Coagulation
C. Sedimentation
D. Disinfection

Read More In water treatment, alum [Al2(SO4)3] is used for the process of __________________?
Chemical Environmental Engineering

Deaeration of high pressure boiler feed water is done to reduce ___________________?

Deaeration of high pressure boiler feed water is done to reduce ___________________?

A. Foaming from boilers
B. Its dissolved oxygen content
C. Its silica content
D. Caustic embrittlement

Read More Deaeration of high pressure boiler feed water is done to reduce ___________________?
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

Noise level inside a jet airliner in normal flight is about ______________ decibels?

Noise level inside a jet airliner in normal flight is about ______________ decibels?

A. 80
B. 100
C. 125
D. 150

Read More Noise level inside a jet airliner in normal flight is about ______________ decibels?
Chemical Environmental Engineering

. Operating principle of cyclone separator is based on the action of _______________ dust particles?

. Operating principle of cyclone separator is based on the action of _______________ dust particles?

A. Diffusion of
B. Centrifugal force on
C. Gravitational force on
D. Electrostatic force on

Read More . Operating principle of cyclone separator is based on the action of _______________ dust particles?
Chemical Environmental Engineering

5-200 μm size particles are called__________________?

5-200 μm size particles are called__________________?

A. Colloids or aerosols
B. Powder
C. Dust
D. Smoke

Read More 5-200 μm size particles are called__________________?