Water Supply Engineering problems
- 1. 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
Correct Answer: in ppm
- 2. 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
Correct Answer: yield of well
- 3. 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. Discuss
Correct Answer: Nil.
- 4. 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
Correct Answer: All the above.
- 5. 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
Correct Answer: 70 cm to 120 cm
- 6. 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
Correct Answer: 1000 to 1250 litres/hr/m2
- 7. 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
Correct Answer: 16 litres/sec.
- 8. 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
Correct Answer: working pressure
- 9. The factor to be considered for the source of city water supply, is
Options- A. quantity and quality of the available water
- B. elevation of the source of water
- C. general terrain intervening the area
- D. all the above. Discuss
Correct Answer: all the above.
- 10. Pick up the correct statement from the following :
Options- A. Domestic use of water is 50% of total consumption
- B. Average consumption of commercial use of water is 25% of total consumption
- C. Consumption of water on public use is 10% of total consumption
- D. Waste water and leakage is 15% of total consumption
- E. all the above. Discuss
Correct Answer: all the above.
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