Chlorine demand of water is equal to________________?

Related Mcqs:

1. The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by_______________?

   A. TOD>BOD>COD
   B. TOD>COD>BOD
   C. BOD>COD>TOD
   D. COD>BOD>TOD

2. 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

3. Residual chlorine in water is determined by________________?

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

4. The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about______________?

   A. 0.01 to 0.05 ppm
   B. 0.05 to 0.5 ppm
   C. 0.5 to 1.0 ppm
   D. 1.0 to 5.0 ppm

5. The percentage of chlorine in fresh bleaching powder is about________________?

   A. 10 to 15
   B. 20 to 25
   C. 30 to 35
   D. 40 to 50

6. The disinfection efficiency of chlorine increases by_______________?

   1) decreasing the time of contact
   2) decreasing the temperature of water
   3) increasing the temperature of water
   The correct answer is ?
   A. only (1)
   B. both (1) and (2)
   C. both (1) and (3)
   D. only (3)

7. 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

8. The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is________________?

   A. circle method
   B. equivalent pipe method
   C. electrical analysis method
   D. Hardy cross method

9. If Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is_________________?

   A. 1000
   B. 4000
   C. 100000
   D. 400000

10. If the average daily consumption of a city is 100,000 m3, the maximum daily con¬sumption on peak hourly demand will be_______________?

    A. 100000m3
    B. 150000m3
    C. 180000m3
    D. 270000 m3