Exercise: Water Supply Engineering

Questions for: Water Supply Engineering

Rapid gravity filter can only remove turbidity of water upto
A:
15 to 25 gm/litre
B:
25 to 30 gm/litre
C:
30 to 35 cm/litre
D:
35 to 40 gm/litre
Answer: D
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The water level in an open well was depressed by pumping 2.5 m and recuperated 2.87 m in 3 hours and 50 minutes. The yield of the well per minute is
A:
0.0033
B:
0.0044
C:
0.0055
D:
0.0066
Answer: C
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The main draw-back of centrifugal pump, is
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
Answer: E
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Quality of water is said to be good if it is
A:
free from suspended matter
B:
colourless
C:
free from pathogenic organism
D:
tasteless
Answer: E
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Pick up the correct statement from the following regarding radial flow centrifugal pumps :
A:
These are provided with volute type or turbine type casings
B:
In involute type of radial flow centrifugal pump, the impeller discharges into a gradually expanding spiral casing
C:
In turbine type of radial flow centrifugal pumps, the impeller is surrounded by stationary guide vanes to reduce the velocity of water
D:
The efficiency of turbine type of radial flow centrifugal pump, is always higher than that of volute type
Answer: E
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