A nuisance is experienced in diluting water if dilution factor is less than_________________?

Related Mcqs:

1. No treatment of the sewage is given if dilution factor is_____________?

   A. Less than 150
   B. Between 150 to 200
   C. Between 200 to 300
   D. More than 500

2. Dilution method of disposing of sewage, is not preferred to_______________?

   A. When sewage is fresh
   B. When diluting water has high dissolved oxygen content
   C. When diluting water is used for water supply near the point of sewage disposed
   D. When the diluting water is having flow currents

3. In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?

   A. frictional force
   B. viscosity
   C. surface friction
   D. all of the above
   E. none of the above

4. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?

   A. 0.05552 cumec
   B. 0.05554 cumec
   C. 0.05556 cumec
   D. 0.0556 cumec

5. As compared to fresh river water, sea water contains oxygen_________________?

   A. 10% less
   B. 20% less
   C. 10% more
   D. 20% more

6. weight of water, the hydraulic mean depth of the sewer and the bed slope w is the unit of the sewer, then the tractive force exerted by flowing water, is________________________?

   A. w r S S
   B. w r1/2
   C. w r S
   D. w r2/3

7. Specific weight of sea water is more that of pure water because it contains ________________?

   A. dissolved air
   B. dissolved salt
   C. suspended matter
   D. all of the above
   E. heavy water

8. A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will__________________?

   A. increase
   B. decrease
   C. remain same
   D. increase/decrease depending on depth of immersion
   E. unpredictable

9. An open vessel of water is accelerated up an inclined plane. The free water surface will___________________?

   A. be horizontal
   B. make an angle in direction of inclination of inclined plane
   C. make an angle in opposite direction to inclination of inclined plane
   D. any one of above is possible
   E. none of the above

10. The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?

    A. head of water (h)
    B. h2
    C. V/T
    D. h2
    E. h3/1.