Quality of water is said to be good if it is free from suspended matter colourle

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Question
Quality of water is said to be good if it is
Options
A. free from suspended matter
B. colourless
C. free from pathogenic organism
D. tasteless
E. all the above.

Correct Answer

all the above.

Water Supply Engineering problems

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3. Check valves are installed
Options
A. on the delivery side of the pumping set
B. at the interconnections between polluted water system and a potable water system
C. both (a) and (b)
D. neither (a) nor (b).

5. At the socket and spigot joint,
Options
A. enlarged end of the pipe is called socket
B. normal end of the pipe is called spigot
C. spigot is fitted into the socket
D. molten lead is used for water proofing
E. all the above.

6. Pick up the correct statement from the following :
Options
A. The internal pressure within a pipe, is caused due to water head and hammer pressure
B. The internal pressure in a pipe running full is equal to vertical ordinate between hydraulic gradient line and centre of the pipe
C. In pressure pipes with water at rest, the pressure is equal to water head
D. Sudden closure of a valve, causes the water hammer pressure
E. All the above.

8. Disinfection of water with ozone is not good because
Options
A. it vanishes before water reaches the consumers
B. it removes the colour, taste and odour from water as bacterias
C. it adds taste to the water
D. it is more efficient than chlorine in killing bacterias
E. none of these.

9. The main draw-back of centrifugal pump, is
Options
A. necessity of priming
B. discharge from pump varies with the load of water
C. for high heads, efficiency is low up to 50%
D. the suction lift is limited to 6 m
E. all the above.

10. The equation in which Q is yearly run off in cm, P is yearly total rainfall in cm, H is difference of R.L.s. of lowest and highest points and A is area of catchment in square metres, is known as
Options
A. English formula
B. Khosla's formula
C. Justin's formula
D. Vermule's formula.

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