Waste water Engineering

Waste water Treatment MCQs PDF for test preparation. Civil Engineering MCQs for PPSC, FPSC, NTS, WAPDA, Pakistan Railways, MES, SPSC, KPPSC, and ETEA.

  • At the junction of sewers :

    A. Tops of both the sewers are at the same level
    B. Top of smaller sewer is kept lower
    C.  Top of larger sewer is kept lower
    D. None of them

  • The sewer which resists sulphide corrosion, is :

    A.  Cast iron sewer
    B. R.C.C. sewer
    C. Lead sewer
    D. Brick sewer

  • The effect of scouring in sewers is more on :

    A. Bottom side
    B. Horizontal side
    C. Top side
    D. None

  • The flow velocity in sewers shouldn’t be :

    A. Less than the self-cleansing velocity
    B. Less than 10 m/sec
    C. More than the self-cleansing velocity
    D. ore than 20 m/sec

  • The sludge does not contain waste water from:

    A. Kitchen sinks
    B. Toilets
    C. Bath rooms
    D. Wash basins

  • 1000 kg of sewage contains ____ ?

    A. 0.225 kg in solution
    B. 0.112 kg in suspension
    C. 0.112 kg in solution
    D. Both a and b

  • Imhoff cone is used to measure ____ ?

    A. Settleable solids
    B. Total in organic solids
    C. Total organic solids
    D. Total solids

  •  For treating the sewage of a large city, you will recommend ____ ?

    A. Sedimentation tanks with high rate trickling filters
    B. A sedimentation tank and an activated sludge treatment plant
    C. A plant consisting of Imhoff tanks with low rate trickling filters
    D. None of them

  • If the dilution factor is, no sewage treatment is done.

    A. Between 150 to 200
    B. Between 200 to 300
    C. Less than 150
    D. More than 500

  • The force applied by:

    A. Pressure sewers are designed to be safe in tension
    B. The sewage when running full from inside, is called internal pressure
    C. The internal pressure if any, causes tensile stress in the pipe material
    D. All the above