Dry weather flow is__________________?
(A) Average daily rate of flow
(B) Average monthly rate of flow
(C) Average annual rate of flow
(D) Water supply allowance per capita
The rational formula for peak drainage discharge, was evolved by_________________?
(A) Fruhling
(B) Lloyd David
(C) Kuichling
(D) All of these
The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is__________________?
(A) 0.10 cumec
(B) 0.12 cumec
(C) 0.15 cumec
(D) 0.20 cumec
Assertion A.: The determination of pH value of sewerage is important. Reason (R): The efficiency of certain treatment methods depends upon the availability of pH value________________?
(A) Both A and R are true and R is the correct explanation of A
(B) Both A and R are true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
For the open drain (N = 0.025) shown in the below figure, the discharge is________________?
(A) 26.88 cumecs
(B) 27.88 cumecs
(C) 28.88 cumecs
(D) 29.88 cumecs
The Chezy’s constant C in the formula V = C_________________?
(A) Size of the sewer
(B) Shape of the sewer
(C) Roughness of sewer surface
(D) All the above
If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains_______________?
(A) Hydrogen sulphide
(B) Carbon dioxide
(C) Methane
(D) Oxygen
The coagulant which is generally not used for treating the sewage, is__________________?
(A) Alum
(B) Ferric chloride
(C) Ferric sulphate
(D) Chlorinated copperas
Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is ?
(A) Centrifugal pump
(B) Pneumatic ejector
(C) Reciprocating pump
(D) None of these
The rainfall at any place may be determined by__________________?
(A) Its intensity
(B) Its direction
(C) Its frequency
(D) All the above