Non-pathogenic bacterias cause the following water borne disease, cholera typhoi

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Question
Non-pathogenic bacterias cause the following water borne disease,
Options
A. cholera
B. typhoid
C. infections hepatitis
D. none of these.

Correct Answer

none of these.

Water Supply Engineering problems

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1. Pick up the correct statement from the following :
Options
A. Air lift pumps are generally used for pumping water from deep wells
B. Jet pumps are generally used for pumping water from small wells
C. The hydraulic ram works on the principle of water hammer
D. Rotary pumps are provided cams which rotate in opposite direction
E. all the above.

5. 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.

6. While selecting the location of an intake for collecting surface water, the factor considered, is
Options
A. The intake point should be near as far as possible to the treatment plant
B. The intake point should be in purer zone of the water source
C. The intake point should be upstream of the point of disposal of waste water
D. The intake point in meandering rivers should be on concave banks
E. All the above;

7. Pickup the incorrect statement from the following :
Options
A. The invert of pressure conduit is independent of the grade of the hydraulic gradient line
B. The pressure conduits may be taken uphill upto a maximum height of 8.3 m
C. Aqueducts and tunnels sections are generally kept circular
D. None of these.

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