Standard EDTA (ethylene diamine tetra acetic aciD. solution is used to determine the_______________?

Related Mcqs:

1. Average rate of water consumption perhead per day as per Indian Standard is______________?

   A. 100 litres
   B. 135 litres
   C. 165 litres
   D. 200 litres

2. Standard BOD is measured at________________?

   A. 20°C – 1day
   B. 25°C- 3day
   C. 20°C – 5day
   D. 30°C- 5day

3. 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

4. Which of the following values of pH represents a stronger acid?

   A. 2
   B. 5
   C. 7
   D. 10

5. The length of rectangular sedimentation tank should not be more than_______________?

   A. B
   B. 2B
   C. 4B
   D. 8B

   where B is the width of the tank

6. 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

7. The velocity of flow does not depend on_______________?

   A. grade of sewer
   B. length of sewer
   C. hydraulic mean depth of sewer
   D. roughness of sewer

8. Septic tank is a______________?

   1) settling tank
   2) digestion tank
   3) aeration tank
   The correct answer is?

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

9. Which of the following chemical compounds can be used for dechlorination of water ?

   A. carbon dioxide
   B. bleaching powder
   C. sulphur dioxide
   D. chloramines

10. Which of the following causes a decrease in per capita consumption ?

    A. use of metering system
    B. good quality of water
    C. better standard of living of the people
    D. hotter climate