Water Supply Engineering problems
- 1. Pick up the correct statement from the following :
Options- A. The pH value of neutral water is 7
- B. The maximum acidity is obtained when pH value is zero
- C. The maximum alkalinity is obtained when pH value is 14.
- D. All the above. Discuss
Correct Answer: All the above.
- 2. Cast iron pipes
Options- A. are widely used in city water supplies
- B. resist corrosion satisfactorily
- C. may last for 100 years
- D. are normally manufactured in lengths of about 3.5 m
- E. all the above. Discuss
Correct Answer: all the above.
- 3. The intake opening is generally covered by a screen to prevent entry of debris etc. and its level is kept
Options- A. at the level of water of the source
- B. at the bottom of water of the source
- C. at about 2.5 m above the bottom
- D. none of these. Discuss
Correct Answer: at about 2.5 m above the bottom
- 4. Plain chlorination is used for water
Options- A. with turbidities less than 20 mg/litre
- B. obtained from clear lakes
- C. consumed during emergencies
- D. supplies to armies during war
- E. all the above. Discuss
Correct Answer: all the above.
- 5. P.V.C. pipes can withstand pressure bead of water upto
Options- A. 25 m
- B. 50 m
- C. 75 m
- D. 100 m
- E. 125 m. Discuss
Correct Answer: 100 m
- 6. Open channels supported over tres-les, are generally known as
Options- A. raised canals
- B. acqueducts
- C. syphons
- D. flumes. Discuss
Correct Answer: flumes.
- 7. The maximum non-verticality of the bore of a well 200 m deep, may be permitted up to
Options- A. 25 cm
- B. 50 cm
- C. 75 cm
- D. 100 cm
- E. 150 cm. Discuss
Correct Answer: 100 cm
- 8. Pick up the correct statement from the following :
Options- A. The ratio of the total sediment deposited in the reservoir to the total sediment flowing in the river, is called trap efficiency
- B. The ratio of the reservoir capacity to the total inflow of water in it, is generally called capacity inflow ratio
- C. Small capacity reservoirs on large rivers generally, silt less
- D. Large capacity reservoirs on small rivers generally silt more
- E. All the above. Discuss
Correct Answer: All the above.
- 9. From the surface of reservoir, evaporation may be minimised by sprinkling
Options- A. Spirit
- B. Hydrochloric acid
- C. Acetyl alcohol
- D. Methane
- E. None of these. Discuss
Correct Answer: Acetyl alcohol
- 10. According to Godrich the ratio of peak demand rate to mean demand is
Options- A.
- B.
- C.
- D.
- E. All the above. Discuss
Correct Answer: All the above.
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