Discussion
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- Question
Rapid gravity filters can remove bacterial impurities up to a maximum of
Options- A. 50%
- B. 60%
- C. 70%
- D. 80%
- E. 90%.
- Correct Answer
- 80%
- 1. The level of underground water is called
Options- A. water level
- B. water table
- C. negative level
- D. invert level. Discuss
- 2. Higher yield may be expected from
Options- A. gravity springs
- B. surface springs
- C. artesian springs
- D. all the above. Discuss
- 3. Water may contain
Options- A. bicarbonate alkalinity
- B. carbonate alkalinity
- C. hydroxide alkalinity
- D. caustic alkalinity
- E. all the above. Discuss
- 4. For the same draw down in two observations wells at distances r1 and r2, the times after start of pumping are t1 and t2 hours respectively. The relation which holds good is
Options- A.
- B.
- C.
- D.
- E. none of these. Discuss
- 5. The valve fitted closely in a recess against an opening in a pipe, is generally
Options- A. wedge shaped circular disc
- B. spherical disc
- C. parallelopiped disc
- D. conical shaped circular disc. Discuss
- 6. m and n are monsoon duration factor and catchment factor respectively. If P is yearly rainfall in cm, runoff can be calculated by
Options- A. velocity area method
- B. weir or spillway method
- C. use of venturi-meter
- D. using power plant consumption
- E. none of these. Discuss
- 7. Pick up the incorrect statement from the following :
Options- A. The water entering the slow sand filters should be treated by 9.386 coagulants
- B. The depth of water on the filter should be twice the depth of the filter sand
- C. When the filter head is 0.75 times the depth of filter sand, the water obtained is purest
- D. The cleaning of slow sand filters is done by back washing
- E. All the above. Discuss
- 8. Most important method for calculating discharge for planning a water supply project, is
Options- A. velocity area method
- B. weir or spillway method
- C. use of venturi-meter
- D. using power plant consumption
- E. none of these. Discuss
- 9. The percentage of chlorine in fresh bleaching powder is roughly
Options- A. 50 to 60
- B. 30 to 35
- C. 40 to 50
- D. 20 to 25 Discuss
- 10. By adding 1 ml of orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution
Options- A. yellowish
- B. greenish
- C. bluish
- D. reddish
- E. violet. Discuss
Water Supply Engineering problems
Search Results
Correct Answer: water table
Correct Answer: artesian springs
Correct Answer: all the above.
Correct Answer:
Correct Answer: wedge shaped circular disc
Correct Answer: velocity area method
Correct Answer: All the above.
Correct Answer: velocity area method
Correct Answer: 30 to 35
Correct Answer: yellowish
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