Sewage Treatment Plant objective questions and answers
26. If the grit chambers is 4.5 million liters per day,its cleaning is done
A.Manually
B.Mechanically
C.Hydraulically
D.Electrically
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B. Mechanically
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27. 'Cowl' is provided at
A.Lower end of ventilating column
B.Upper end of ventilating column
C.Upper end of the manhole
D.First step in manhole
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28. Which one of teh following is not a coagulating agent?
A.Copper sulphate
B.Ferric sulphate
C.luminium sulphate
D.Lime
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29. Which of the following diseases is not considered to be waterborne?
A.Small pox
B.Typhoid
C.Cronic dysentery
D.Paratyphoid
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30. The operation ofdestruction of organic matter by having it served as food for bacteria, is carried out in
A.sludge setting tank.
B.sludge digestion tanks.
C.sludge beds.
D.vaccum filters.
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