The devices which are installed for drawing water from the sources are called______________?

Related Mcqs:

1. A pipe which is installed in the house drainage to preserve the water seal of traps is called______________?

   A. vent pipe
   B. antisiphonage pipe
   C. waste pipe
   D. soil pipe

2. Assertion A : The consumption of water increases with increase in the distribution pressure. Reason R : Higher distribution pressure causes more loss and waste of water. Select your answer according to the coding system given below?

   A. Both A and R are true and R is the correct explanation of A
   B. Both A and R are true but R is not the correct explanation of A
   C. A is true but R is false
   D. A is false but R is true

3. The depression of water table in a well due to pumping will be maximum_______________?

   A. at a distance R from the well
   B. close to the well
   C. at a distance R/2 from the well
   D. none of the above
   where R is the radius of influence

4. Residual chlorine in water is determined by________________?

   A. starch iodide method
   B. orthotolidine method
   C. both (A) and (B)
   D. none of the above

5. If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to________________?

   A. total alkalinity
   B. total hardness
   C. total hardness – total alkalinity
   D. non carbonate hardness

6. The percentage of filtered water, which is used for backwashing in rapid sand filters, is about______________?

   A. 0.2 to 0.4
   B. 0.4 to 1.0
   C. 2 to 4
   D. 5 to 7

7. The major disadvantage of lime soda process of water softening is that_________________?

   A. it is unsuitable for turbid and acidic water
   B. huge amount of precipitate is formed which creates a disposal problem
   C. the effluent cannot be reduced to zero hardness
   D. it is unsuitable for softening the water of excessive hardness

8. The type of valve which is provided to control the flow of water in the distribution system at street corners and where the pipe lines intersect is_______________?

   A. check valve
   B. sluice valve
   C. safety valve
   D. scour valve

9. On standard silica scale, the turbidity in drinking water should be limited to_______________?

   A. 10 ppm
   B. 20 ppm
   C. 30 ppm
   D. 50 ppm

10. If the coliform bacteria is present in a sample of water, then the coliform test to be conducted is_____________?

    1) presumptive coliform test
    2) confirmed coliform test
    3) completed coliform test
    The correct answer is ?

    A. only (1)
    B. both (1) and (2)
    C. both (1) and (3)
    D. all (1), (2) and (3)