WASTEWATER ENGINEERING MCQ Civil Engineering

 WASTEWATER ENGINEERING MCQ Civil Engineering

Highway engineering MCQ PDF Download now

Part 1 click here to attempt Question 1 to 10

11. In rotating biological contractors, what percent of corrugated plastic discs are submerged?
a) 20
b) 50
c) 80
d) 40
Answer: (d)
12. Organic contaminants are removed from the wastewater by ____________
a) Water softening
b) Demineralization
c) Absorption
d) Adsorption
Answer: (d)
13. By which process, odor producing substances are oxidized?
a) Chlorination
b) Liming
c) Re-carbonation
d) Super-chlorination
Answer: (d)
14. Which of the following process is used to remove the colloidal particles from the effluent?
a) Chemical precipitation
b) Chemical coagulation
c) Ion exchange
d) Adsorption
Answer: (b)
15. In which form of solute stabilization, hydrogen sulfide in the effluent is oxidized into sulfate?
a) Chlorination
b) Liming
c) Re-carbonation
d) Super-chlorination
Answer: (a)
16. A grit chamber is usually installed ______ primary sedimentation tanks.
a) Before
b) After
c) In between
d) In
Answer: (a)
17. Grit chambers are constructed to prevent their accumulation in _______
a) Sedimentation tank
b) Sludge digesters
c) Coagulation tank
d) Sand filter
Answer: (b)
18. Grit chamber is similar to which of the following?
a) Screening unit
b) Sedimentation tank
c) Coagulation tank
d) Sand bed
Answer: (b)
19. With respect to the operation which of these screens is the most expensive?
a) Chain driven
b) Continuous belt
c) Catenary
d) Reciprocating
Answer: (b)
20. Which of these type of screen can be used both as a fine and coarse screen?
a) Continuous belt
b) Catenary
c) Reciprocating
d) Chain driven
Answer: (a)
21. Which of the following materials is not used in the construction of a septic tank?
a) Concrete
b) Rubber
c) Fibreglass
d) Plastic
Answer: (b)
22. The scum formed in the tank _____
a) Flows
b) Gets dissolved
c) Sink into the bottom
d) Floats on top
Answer: (d)
23. During the disposal of the sludge, it must be ______
a) Liquefied
b) Dried
c) Burned
d) Fluidized
Answer: (b)
24. What is the amount of water used per person per day for flushing?
a) 2-3 L
b) 3-10 L
c) 4-30 L
d) 5-40 L
Answer: (d)
25. Which of the following reasons is correct with respect to the need of providing baffle walls?
a) Mixing of scum and wastewater
b) Settling of heavy particles
c) Increase velocity of the liquid
d) Prevent scum and solids from escaping
Answer: (d)