Water Supply Engineering problems
- 1. The bacterias which may survive with or without free oxygen, are called
Options- A. Aerobic bacterias
- B. Anaerobic bacterias
- C. Faculative bacteria's
- D. None of these. Discuss
Correct Answer: Faculative bacteria's
- 2. The most important and widely used tube well in India, is
Options- A. strainer well
- B. cavity well
- C. slotted well
- D. perforated pipe well. Discuss
Correct Answer: strainer well
- 3. For a city developed haphazardly, the layout of distribution pipes preferred to, is
Options- A. ring system
- B. radial system
- C. grid iron system
- D. dead end system. Discuss
Correct Answer: dead end system.
- 4. Maximum permissible colour for domestic water supplies, based on Cobalt scale, is
Options- A. 5 P.P.M.
- B. 10 P.P.M.
- C. 15 P.P.M.
- D. 20 P.P.M.
- E. 25 P.P.M. Discuss
Correct Answer: 20 P.P.M.
- 5. In centrifugal pump installation,
Options- A. pump is properly primed before starting
- B. the diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe
- C. the foot valve fitted at the bottom end of the suction pipe, prevents the movement of water from the pump when it is stopped
- D. the motor may burn out if it is started with empty delivery pipe and with open gate valve
- E. all the above. Discuss
Correct Answer: all the above.
- 6. Water is distributed to consumers by gravitational system, in
Options- A. Dehradun
- B. Bombay
- C. Delhi
- D. Calcutta
- E. Both (a) and (b). Discuss
Correct Answer: Both (a) and (b).
- 7. For a network of distribution pipes of a proposed township shown in the below figure, the layout of distribution system, is
Options- A. dead end system
- B. grid-iron system
- C. ring system
- D. radial system. Discuss
Correct Answer: radial system.
- 8. Chlorination of water does not remove
Options- A. ammonia content
- B. B.O.D.
- C. organic matter content
- D. dissolved oxygen. Discuss
Correct Answer: dissolved oxygen.
- 9. Pick up the incorrect statement from the following :
Options- A. The flow in strainer type wells is radial
- B. The flow in cavity type wells in spherical
- C. In strainer type wells, area of flow depends upon the length of the strainer pipe
- D. In cavity type wells, area of flow depends upon the size of the cavity
- E. None of these. Discuss
Correct Answer: In strainer type wells, area of flow depends upon the length of the strainer pipe
- 10. For the prediction of future population of a city, the factor to be considered, is
Options- A. births
- B. deaths
- C. migrants
- D. all the above. Discuss
Correct Answer: all the above.
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