1. The transitional middle portion of a logistic curve follows
2. Pick up the incorrect statement from the following regarding fire hydrants
3. The specific retention is least in case of
4. B.O.D. of treated water should be
5. Most commonly used pump for lifting water in water supply mains, is
6. Economic height of a dam is the height corresponding to which
7. Distribution mains of any water supply, is normally designed for its average daily requirement
8. If pH value of water is
9. In pressure supply mains, water hammer pressure is reduced by providing
10. P0, P1, P2 be the populations of a city at times t0, t1 and t2 = 2t1, the saturation value of the population Ps of the city, is
11. Water supply system includes
12. Corrosion of a pipe
13. Most satisfactory formula for an estimate of fire demand Q for a city of population P in thousands for Indian conditions, is
14. According to Kuichling's formula, fire demand in litres per minute for a population of P thousands, is
15. The maximum permissible nitrites in public water supplies, is
16. A high velocity of wash water is required for
17. In distribution pipes, drain valves are provided at
18. Corrosion of well pipes may not be reduced by
19. Manholes along the mains from the source to a city are provided at 500 m intervals in
20. The population growth curve is
21. Turbidity of raw water is a measure of
22. If V is total consumption of water in litres for a population of N individuals, per capita consumption or water allowance for the water supply Q, is given by
23. Water supply includes
24. Asbestos pipes are
25. The maximum depth of sedimentation tanks is limited to