In chlorination, with the rise in temperature of water, death rate of bacteria____________?

Related Mcqs:

1. As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is___________________?

   A. smaller
   B. larger
   C. same
   D. none of the above

2. The process in which the chlorination is done beyond the break point is known as_________________?

   A. prechlorination
   B. post chlorination
   C. super chlorination
   D. break point chlorination

3. 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

4. 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

5. The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of________________?

   A. 1 mg/litre
   B. 10 mg/litre
   C. 100 mg/litre
   D. 1000 mg/litre

6. The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally_______________?

   A. less and more
   B. less and less
   C. more and less
   D. more and more

7. The rate of Alteration of pressure filters is_________________?

   A. less than that of slow sand filters
   B. in between the filtration rate of slow sand filters and rapid sand filters
   C. greater than that of rapid sand filters
   D. equal to that of slow sand filters

8. The rate of BOD exerted at any time is_____________?

   A. directly proportional to BOD satisfied
   B. directly proportional to BOD remain-ing
   C. inversely proportional to BOD satisfied
   D. inversely proportional to BOD re-maining

9. The rate of filtration in slow sand filters in million litres per day per hectare is about_____________?

   A. 50 to 60
   B. 100 to 150
   C. 500 to 600
   D. 1400 to 1500

10. The overflow rate for plain sedimentation tanks is about__________________?

    A. 500 to 750 litres/hour/ m2
    B. 1000 to 1250 litres/hour/ m2
    C. 1250 to 1500 litres/hour/m2
    D. 1500 to 2000 litres/hour/m2