Water Supply Engineering - Water Supply Engineering objective questions and answers


21.  The total count of bacteria in portable water should not exceed


   A. 10000 per c.c.

   B. 5000 per c.c.

   C. 999 per c.c.

   D. 100 per c.c.


✔ View Answer


D. 100 per c.c.

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22.  Disinfection of water with ozone isn't good because


   A. It vanishes before water reaches the consumers

   B. It removes the colour taste and odour from water as bacterious

   C. It adds taste to the water

   D. It is more efficient than chlorine in killing bacterias


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D. It is more efficient than chlorine in killing bacterias

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23.  Biochemical oxygen demand ( B.O.D. ) of safe drinking water must be


   A. 0

   B. 10

   C. 50

   D. 100


✔ View Answer


A. 0

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24.  The odour of water can be determined by


   A. Thermometer

   B. Osmoscope

   C. Jackson's turbidimeter

   D. None of the above


✔ View Answer


B. Osmoscope

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25.  The water obtained from tubewells is known ass


   A. Surface water

   B. Sub surface water

   C. Run-off

   D. Portable water


✔ View Answer


B. Sub surface water

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