Category: Environmental Engineering

A. standard silica scale
B. standard cobalt scale
C. standard platinum scale
D. platinum cobalt scale

A. sludge digestion tank
B. sedimentation tank
C. activated sludge treatment
D. trickling filters

A. circular sewer
B. egg shaped sewer
C. horse-shoe type sewer
D. semi-elliptical sewer

A. to increase the filtration slow sand filters capacity of
B. to increase the filtration rapid sand filters capacity of
C. for isolated buildings like pools, hotels etc swimming
D. all of the above

A. acidic and alkaline
B. alkaline and acidic
C. both acidic
D. both alkaline

1) climatic conditions
2) quality of water
3) distribution pressure
The correct answer is?

A. only (1)
B. both (1) and (2)
C. both (1) and (3)
D. all (1), (2) and (3)

1) increase in turbidity of water
2) decrease in turbidity of water
3) increase in temperature of water
4) decrease in temperature of water
The correct answer is?

A. (1) and (2)
B. (1)and (4)
C. (2) and (3)
D. (2) and (4)

A. 2 to 4
B. 4 to 6
C. 6 to 8
D. 8 to 10

A. nitrification
B. chlorination
C. oxidation
D. none of the above

A. reduced at higher pH value of water
B. unaffected by pH value of water
C. increased at higher pH value of water
D. highest at pH value equal to 7