Related Questions

Air pollution, together withA littering, areB causing manyC problems in our largeD,industrial citiesE today.
A A
B B
C C
D D
Which one of the following is not causing air pollution?
A aircrafts
B factories
C power station
D bicycle
Choose the word that best completes the sentence : Noise pollution generally receives less attention than ----- air pollution.
A does
B it does
C over
D it does over
Air pollution caused by industrial fumes "has" been studied for years, "but " only recently "has" the harmful effects of noise pollution "become" known.
A 1
B 2
C 3
D 4
Noise pollution generally receives less attention than------ air pollution.
A does
B it does
C over
D it does over
Very fine suspended and colloidal impurities are removed from water by a process called
A Sedimentation
B Coagulation
C Disinfection
D Softening
The most widely used coagulant for removing suspended impurities from water is
A Bleaching powder
B Chlorine
C Calcium sulphate
D Alum
Which of the following impurities in feed water for high pressure boiler is the most detrimental?
A Silica
B Dissolved oxygen
C Suspended salt
D Dissolved salt
Most widely and commonly used coagulant for the removal of suspended impurities in water is
A Bleaching powder
B Slaked lime
C Alum
D Copper sulphate
Presence of dissolved impurities of __________ is responsible for the red brownish color of water.
A Carbonates
B Bi-carbonates
C Iron & manganese
D Arsenic

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