Environmental Engineering MCQs

A. grade of sewer

B. length of sewer

C. hydraulic mean depth of sewer

D. roughness of sewer

A. 10 to 25

B. 50

C. 75

D. 100

A. carbon dioxide

B. bleaching powder

C. sulphur dioxide

D. chloramines

A. circular sewer

B. egg shaped sewer

C. rectangular sewer

D. none of the above

A. increasing the depth of tank

B. decreasing the depth of tank

C. increasing the surface area of tank

D. decreasing the surface area of tank

A. 0

B. 1

C. infinity

D. none of the above

A. less than that of slow sand filters

B. in between the filtration rate of slow sand filters and rapid sand filters

C. greater than that of rapid sand filters

D. equal to that of slow sand filters

A. to decrease it

B. to increase it

C. fluctuating

D. nil

A. prechlorination

B. post chlorination

C. super chlorination

D. break point chlorination

A. 0.1 mg/litre

B. 1.5 mg/litre

C. 5 mg/litre

D. 10 mg/litre