Sunlight_________________ ?

Related Mcqs:

1. Disinfection of drinking water, is done to remove_________________?

   A. odour B. bacterias C. turbidity D. colour...

2. 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...

3. 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...

4. The maximum depth of sedimentation tanks is limited to________________?

   A. 2 m B. 3 m C. 4 m D. 5 m E. 6 m...

5. 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...

6. Surge tanks are used_______________?

   A. for storage water B. to increase the velocity in a pipeline C. as overflow valves D. to guard against water hammer...

7. Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be________________?

   A. nil B. 5 C. 10 D. 15 E. 20...

8. In distribution pipes, drain valves are provided at_______________?

   A. lower point B. higher point C. junction points D. any where...

9. 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...

10. Aeration of water is done to remove______________?

    A. odour B. colour C. bacterias D. hardness E. turbidity...