Category: Chemical Environmental Engineering Mcqs

A.for disinfection
B.for taste and colour control
C.as algicides
D.for weed control in reservoirs

A.some of the particles may be positively charged
B.some of the particles may be negatively charged
C.some of the particles may be uncharged
D.all of the above

A.nitrogen
B.hydrogen sulphide
C.methane
D.carbon monoxide

A.the aerobic decomposition of deposited sweage solids
B.separation of deposited solids
C.anaerobic decomposition of deposited solids
D.separation of oil and grease scums.

A.will be increased at higher pressure drops
B.will be decreased at higher pressure drops
C.will not be affected by changing pressure drop
D.none of the above

A.Cyclone separator
B.Electrostatic precipitator
C.Fabric filter
D.Wet scrubber

A.increasing the capacity of storage reservoirs
B.increasing flow of sewage through Imhoff tanks
C.reducting the excessive flow in sewers
D.disposing sludge

A.producing an electric charge on the particle to be collected and then directing it by electrostatic forces to the collecting electrodes
B.centrifugal force acting on the particle
C.diffusion of dust particles
D.the creation of intimate contact between a stream of gas and a flow of scrubbing liquor.

A.varies inversely as the particle size and directly as the dust concentration
B.varies inversely as the dust concentration and directly as the particle size
C.varies directly as the particle size as well as the dust concentration
D.varies inversely as the particle size as well as the dust concentration

A.a group of individuals of any one kind of organism
B.all of the population occupying a given area
C.the community and non-living environment working together
D.a portion of the earth where living objects can be found