Water Supply Engineering problems
- 1. By boiling water, hardness can be removed if it is due to
Options- A. calcium sulphate
- B. magnesium sulphate
- C. calcium nitrate
- D. calcium bicarbonate
- E. none of these. Discuss
Correct Answer: calcium bicarbonate
- 2. If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is
Options- A. 1880 kilo litres
- B. 2880 kilo litres
- C. 3880 kilo litres
- D. 4880 kilo litres. Discuss
Correct Answer: 2880 kilo litres
- 3. The specific retention is least in case of
Options- A. Clay
- B. Sand
- C. Silt
- D. Coarse gravel. Discuss
Correct Answer: Coarse gravel.
- 4. B.O.D. of treated water should be
Options- A. 10 ppm
- B. 25 ppm
- C. 20 ppm
- D. 30 ppm
- E. Nil. Discuss
Correct Answer: Nil.
- 5. Acidity in water is caused due to
Options- A. Mineral acids
- B. Free CO2
- C. Iron sulphate
- D. Aluminium sulphate
- E. All the above. Discuss
Correct Answer: All the above.
- 6. Disinfection of drinking water, is done to remove
Options- A. odour
- B. bacterias
- C. turbidity
- D. colour. Discuss
Correct Answer: bacterias
- 7. The factor affecting per capita demand, is
Options- A. size of the city
- B. climatic conditions
- C. pressure in water mains
- D. cost of water
- E. all the above. Discuss
Correct Answer: all the above.
- 8. If V is total consumption of water in litres for a population of N individuals, per capita consumption or water allowance for the water supply Q, is given by
Options- A.
- B.
- C.
- D. none of these. Discuss
Correct Answer:
- 9. Pick up the incorrect statement from the following. The underground sources of water, is from
Options- A. wells
- B. springs
- C. infiltration wells
- D. storage reservoirs
- E. none of these. Discuss
Correct Answer: storage reservoirs
- 10. Pick up the correct statement from the following :
Options- A. Excess quantities of iron and manganese in water, cause discolouration of clothes
- B. Lead and barium salts have toxic effect
- C. Arsenic and selenium are poisonous to human health
- D. Higher copper content affects the lungs
- E. All the above. Discuss
Correct Answer: All the above.
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