Water Supply & Waste Water Engg.WSWWE 4th Civil /0514/Dec 2017 Diploma Paper

Water Supply & Waste  4th Semester Civil/0514/Dec 2017 Paper

                                                SECTION-A

Q 1 a) Fill in the Blanks                                                                                                            15×1=15  

    a) Process of partial or complete removal of residual chlorine in water is known as Chlorination .
    b) Salt is the main substance in chloride water.
    c) Air Valve is placed on the d/s side of all other gate valves.
    d) BOD is a measure for finding out the Strength of sewage.
    e) For the inspection of reservoirs intake pipes are provided.
    f) Masonry sewers are used when the size is large
    g) Chlorides should not be more than 100 ppm.
    h) A trap provided at the junction of house drain and street sewer is known as House drainage system
    i) The water closet is provided for receiving Human Excreta .
    j) The pipe installed to preserve the water seal of trap is called anti-syphonage system .

   b) State True or False.

    k) Trickling filters are used to treat the sewage. (True)
    l) Ozone is very efficient disinfectant. (True)
   m) Lime when added to water decreases the PH of water. (False)
   n) G.I pipes are used for house drainage. (False)
   o) Coagulation is needed when size of the particle is large. (True)