Discussion
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- Question
The permissible amount of nitrites present in potable water, is
Options- A. 10 ppm
- B. 15 ppm
- C. 20 ppm
- D. 45 ppm
- E. Nil.
- Correct Answer
- Nil.
- 1. Recuperation test is carried out to determine
Options- A. turbidity of water
- B. pH value of water
- C. yield of well
- D. discharge from a well. Discuss
- 2. Turbidity of water is expressed
Options- A. in ppm
- B. in numbers in an arbitrary scale
- C. by pH value
- D. by colour code. Discuss
- 3. Detention period of a settling tank is
Options- A. average theoretical time required for water to flow through the tank
- B. time required for flow of water to fill the tank fully
- C. average time for which water is retained in tank
- D. ratio of volume of basin of a sedimentation tank to the rate of flow
- E. all the above. Discuss
- 4. If Q is discharge is cubicmetres per sec and D is the economical diameter of the pipe. According to Lea
Options- A. D = 0.67 to 0.87 Q
- B. D = 0.77 to 0.97 Q
- C. D = 0.97 to 1.22 Q
- D. D = 1.22 to 1.33 Q. Discuss
- 5. According to Buston's formula, fire demand in litres per minute for a population of P thousands, is
Options- A. 3182 P
- B.
- C. 4637 P (1 - 0.01 P)
- D. 5663 P
- E. none of these. Discuss
- 6. Before constructing a dam, the factor to be considered for controlling sedimentation, is
Options- A. selection of dam site
- B. construction of check dams
- C. providing vegetation screens
- D. providing under-sluices in the dam
- E. All the above. Discuss
- 7. A slow sand filter is cleaned if its filter head is higher than
Options- A. 10 cm to 20 cm
- B. 20 cm to 40 cm
- C. 40 cm to 70 cm
- D. 70 cm to 120 cm
- E. 120 cm to 150 cm. Discuss
- 8. Normal values of overflow rate for plain sedimentation tank using coagulants, is
Options- A. 750 to 1000 litres/hr/m2
- B. 1000 to 1250 litres/hr/m2
- C. 1250 to 1500 litres/hr/m2
- D. 1500 litres/hr/m2. Discuss
- 9. If the specific capacity of a well is 0.3183 x 10-3 per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is
Options- A. 8 litres/sec
- B. 10 litres/sec
- C. 12 litres/sec
- D. 14 litres/sec
- E. 16 litres/sec. Discuss
- 10. The maximum pressure to which a pipe is subjected to during its operation, is known
Options- A. working pressure
- B. design pressure
- C. test pressure
- D. pipe pressure
- E. all the above. Discuss
Water Supply Engineering problems
Search Results
Correct Answer: yield of well
Correct Answer: in ppm
Correct Answer: all the above.
Correct Answer: D = 0.97 to 1.22 Q
Correct Answer: 5663 P
Correct Answer: All the above.
Correct Answer: 70 cm to 120 cm
Correct Answer: 1000 to 1250 litres/hr/m2
Correct Answer: 16 litres/sec.
Correct Answer: working pressure
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