The process of killing the ineffective bacteria from the water and making it safe for use is known as
A.Disinfection
B.Sterilization
C.Filtration
D.Purification
E.None of the above
Category: Environmental Engineering Mcqs
For controlling the growth of algae, the chemical generally used is
A.Alum
B.Lime
C.Bleaching powder
D.Copper sulphate
E.Ozone
Alum increases
A.Hardness of water
B.Carbonates of water
C.Sulphates in water
D.Acidity of water
E.None of the above
Which one of the following is not directly related to the phenomenon of evaporation?
A.Temperature of liquid
B.Volume of the liquid
C.Surface area of the liquid
D.Surface winds over the liquid
Which of the following area of work needs highest level of illumination?
A.Bakeries
B.Book binding
C.Confectionary factory
D.Clothing factory
Thiosulphate is the antidote for the poisonous effect due to
A.Arsenic
B.Lead
C.Mercury
D.Cyanide
E.Organic phosphorous compounds
A blue smoke from a diesel engine indicates presence of
A.Nitrous oxide
B.Carbon dioxide
C.Carbon monoxide
D.Unburnt oil
E.Unburnt carbon
DDT is
A.An inorganic compound
B.A compound of phosphours
C.A chlorinated hydrocarbon
D.A naturally occurring chemical
E.None of the above
Zeolite is
A.A naturally occurring salt
B.Hydread silica
C.Silicon carbide
D.Hydrated calcium silicate
E.Hydrated alumino-silicate
The method used for the removal of fine suspended particle is
A.Filtration
B.Agitation
C.Flotation
D.Aeration
E.Screening
