A. 2 m
B. 2.25 m
C. 2.50 m
D. 2.75 m
E. 3.00 m
Related Mcqs:
- The yield of a rapid gravity filter as compared to that of slow sand filter, is__________________?
A. 10 times
B. 15 times
C. 20 times
D. 30 times
E. 35 times - The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level_______________?
A. 1500 m
B. 1505 m
C. 1475 m
D. 1485 m - As per IS : 1172-1963, water required per head per day for average domestic purposes, is_______________?
A. 50 litres
B. 65 litres
C. 85 litres
D. 105 litres
E. 135 litres - According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for________________?
A. Boarding schools
B. Nurses home and medical quarters
C. hostels
D. all the above - For determining the velocity of flow of underground water, the most commonly used non-empirical formula is________________?
A. Darcy’s formula
B. Slichter’s formula
C. Hazen’s formula
D. Lacy’s formula - The underground sources of water, is from______________?
Pick up the incorrect statement from the following?
A. wells
B. springs
C. infiltration wells
D. storage reservoirs
E. none of these - Corrosion of well pipes may not be reduced by_________________?
A. reducing the draw down and the pumping rate
B. reducing the flow velocity
C. using thicker pipes
D. using screens having larger area of openings
E. none of these - Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be________________?
A. nil
B. 5
C. 10
D. 15
E. 20 - In distribution pipes, drain valves are provided at_______________?
A. lower point
B. higher point
C. junction points
D. any where - Aeration of water is done to remove______________?
A. odour
B. colour
C. bacterias
D. hardness
E. turbidity
