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Tuesday, April 25, 2017




Roll No­­­­­­­­­_________
WATER SUPPLY AND WASTE WATER ENGINEERING
4th Exam /Civil/5165/Dec 07
                                                             
Duration 3 Hrs.
Section –A
1.     Choose the correct one
a.     Any trap is intended to trap
                                                             i.      Water
                                                           ii.      Sewage of sullage
                                                        iii.      Any liquid waste
                                                        iv.      Foul gases
b.     Disinfection is the process of
                                                             i.      Killing all bacteria
                                                           ii.      Killing only pathogenic bacteria
                                                        iii.      Removal of causative organism for disease
                                                        iv.      Complete destruction of life
c.      A water born disease is
                                                             i.      Malaria
                                                           ii.      Cancer
                                                        iii.      Dysentery
                                                        iv.      Encephalitis
d.     A sewer that collects sewage from toilet is called.
                                                             i.      Lateral
                                                           ii.      Branch sewar
                                                        iii.      Main sewar
                                                        iv.      Outfall sewar
e.      The pipe in building through which human excreta flows is called.
                                                             i.      Soil pipe
                                                           ii.      Waste pipe
                                                        iii.      Vent pipe
                                                        iv.      None of these
State true or false:
a.     P H value of drinking water should be more than 8,
b.     Kitchen waste is sullage.
c.      Slow sand filters require less area
d.     BOD of safe drinking water must be nil.
Masonry sewers are used for small sizes.
          Fill in the blanks:
a.     The process of supporting the sides of trenches by wooden members is the termed as ______
b.     Alum is used for ______
c.      Units of turbidity are ______
d.     A sewer, which receives storm water, surface run- off and sewage , is called ______ sewer.
e.      Sluice valve is provided to ________ the flow of water through the pipe.
Section-B
Note : Attempt any ten questions
a.     What do you mean by the term per capita demand?
b.     What do you mean by MPN?
c.      What is break point chlorination  ?
d.     Differentiate between arithmetic and geometrical methods of for casting the population.
e.      What is the purpose of filtration?
f.       When water is said to be potable?
g.     Differentiate between DWF and Storm sewage
h.     Define the separate system of sewerage
i.       What is the self cleansing velocity?
j.       Define aerobic conditions.
k.     What is antisyphonage pipe?
Section-C
Note : Attempt any three questions
2.     Explain the different methods of sewage disposal
3.     Explain in brief the ring system of water distribution
4.     Define the various types of impurities in water and discuss their effects

5.     Explain the steps involved in activated sludge proceses.    

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