As compared to cast iron pipes, steel pipes are______________?

Related Mcqs:

1. Most of the bacteria in sewage are______________?

   A. parasitic
   B. saprophytic
   C. pathogenic
   D. anaerobic

2. As compared to shallow-wells, deep wells have______________?

   A. more depth
   B. less depth
   C. more discharge
   D. less discharge

3. 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

4. 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

5. As compared to rapid sand filters, slow sand filters give______________?

   1) slower filtration rate
   2) higher filtration rate
   3) lesser efficiency in removal of bacteria
   4) higher efficiency in removal of bacteria
   The correct answer is?

   A. (1) and (2)
   B. (2) and (3)
   C. (1) and (4)
   D. (2) and (4)

6. As compared to geometrical increase method of forecasting population, arithmetical increase method gives________________?

   A. lesser value
   B. higher value
   C. same value
   D. accurate value

7. The hourly variation factor is usually taken as______________?

   A. 1.5
   B. 1.8
   C. 2.0
   D. 2.7

8. The suitable layout of a distribution system for irregularly growing town is_______________?

   A. dead end system
   B. grid iron system
   C. radial system
   D. ring system

9. For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as___________________?

   A. 4.5 to 6.0
   B. 6.5 to 8.0
   C. 8.5 to 10.0
   D. 10.5 to 12.0

10. The specific gravity of sewage is_______________?

    A. much greater than 1
    B. slightly less than 1
    C. equal to 1
    D. slightly greater than 1