The water carried sewerage system removes__________________?

Related Mcqs:

1. The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?

   A. 20 cm
   B. 25 cm
   C. 40 cm
   D. 50 cm

2. Assertion A.: The determination of pH value of sewerage is important. Reason (R): The efficiency of certain treatment methods depends upon the availability of pH value________________?

   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 a correct explanation of A
   C. A is true but R is false
   D. A is false but R is true

3. The sewerage system consists of______________________?

   A. House sewer
   B. Lateral sewer
   C. Branch sewer
   D. All of these

4. The sewerage system originates from__________________?

   A. House sewers
   B. Lateral sewers
   C. Branch sewers
   D. Main sewers

5. 3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is______________________?

   A. 100 mg/l
   B. 200 mg/l
   C. 300 mg/l
   D. 400 mg/l

6. A sewer pipe contains 1 mm sand particles of specific gravity 2.65 and 5 mm organic particles of specific gravity 1.2, the minimum velocity required for removing the sewerage, is_____________________?

   A. 0.30 m/sec
   B. 0.35 m/sec
   C. 0.40 m/sec
   D. 0.45 m/sec

7. The most efficient cross section of sewers in a separate sewerage system is__________________?

   A. Parabolic
   B. Circular
   C. Rectangular
   D. New egged

8. In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is_______________?

   A. Separate system
   B. Combined system
   C. Partially combined system
   D. None of these

9. In areas where rainy season is limited to a few months, the type of sewerage system recommended is__________________?

   A. Combined system
   B. Partially separate system
   C. Separate system
   D. None of these

10. The most efficient cross-section of sewers in a combined sewerage system is________________?

    A. Parabolic
    B. Circular
    C. Rectangular
    D. New egged