Q.1
Which of these require a flash mixer and flocculation prior to it?
  • a) High rate solid contact clarifier
  • b) Clariflocculator
  • c) Secondary clarifier
  • d) Dissolved aeration flotation
Q.2
Which of these require a flash mixer prior to it?
  • a) High rate solid contact clarifier
  • b) Clariflocculator
  • c) Secondary clarifier
  • d) Dissolved aeration flotation
Q.3
Which of these don’t require a flash mixer and a flocculator prior to it?
  • a) High rate solid contact clarifier
  • b) Clariflocculator
  • c) Secondary clarifier
  • d) Dissolved aeration flotation
Q.4
Which of these is the most efficient?
  • a) High rate solid contact clarifier
  • b) Primary clarifier
  • c) Clariflocculator
  • d) Tube settler
Q.5
While designing a clarifier what is the maximum limit velocity that is assumed?
  • a) 1.5 m/h
  • b) 2.5 m/h
  • c) 3 m/h
  • d) 3.5 m/h
Q.6
While designing a clariflocculator what is the maximum limit velocity that is assumed?
  • a) 1.5 m/h
  • b) 2.0 m/h
  • c) 3 m/h
  • d) 3.5 m/h
Q.7
While designing an HRSCC what is the velocity assumed?
  • a) 1.5 m/h
  • b) 2.5 m/h
  • c) 3 m/h
  • d) 3.5 m/h
Q.8
While designing a clariflocculator what is the maximum detention time assumed for the flocculation zone?
  • a) 40 mins
  • b) 60 mins
  • c) 90 mins
  • d) 120 mins
Q.9
While designing an HRSCC what is the detention time assumed for the draft tube?
  • a) 60 secs
  • b) 90 secs
  • c) 120 secs
  • d) 150 secs
Q.10
While designing an HRSCC what is the detention time assumed for the detention hood?
  • a) 60 secs
  • b) 90 secs
  • c) 120 secs
  • d) 150 secs
Q.11
While designing an HRSCC what is the Solid loading rate assumed for the Clarification zone?
  • a) 1 m/h
  • b) 2 m/h
  • c) 0.75 m/h
  • d) 0.9 m/h
Q.12
Calculate the diameter of the draft tube for the following data.
  • a) 4 m
  • b) 5 m
  • c) 6 m
  • d) 7 m
Q.13
Calculate the clarifier volume for a HRSCC for the following data.
  • a) 40 m2
  • b) 90 m2
  • c) 75 m2
  • d) 100 m2
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