Top 250+ Solved Waste Water Treatment MCQ Questions Answer

From 61 to 75 of 211

Q. The impact of pollution depends upon nature of the pollutants and the ___________

a. Toxic contaminants

b. Season

c. Contaminants

d. Characteristics of river

  • d. Characteristics of river

Q. Which of the following sewerage systems carry domestic and industrial wastewater?

a. sanitary sewers

b. storm sewers

c. combined sewers

d. storm and combined sewers

  • a. sanitary sewers

Q. Which of the following is a strict anaerobe?

a. Enterobacter

b. Alcaligenes

c. Pseudomonas

d. Methanosarcina

  • d. Methanosarcina

Q. In which of the following treatment involve oxidation of organic constituents of the wastewater?

a. Primary treatment

b. Secondary treatment

c. Advanced treatment

d. Final treatment

  • b. Secondary treatment

Q. Activated sludge usually employs an aeration period of ________________

a. 1 hour

b. 24 hours

c. 10-15 hours

d. 4-8 hours

  • d. 4-8 hours

Q. Trickling filter is used in which of the following wastewater treatment processes?

a. Primary treatment

b. Secondary treatment

c. Advanced treatment

d. Final treatment

  • b. Secondary treatment

Q. Belt filter presses are used in which of the following process?

a. Thickening

b. Stabilization

c. Dewatering

d. Disposal

  • c. Dewatering

Q. Which of the following gases are produced in large amounts during sludge digestion?

a. methane

b. carbon-dioxide

c. hydrogen

d. nitrogen

  • a. methane

Q. Biological process is used to remove _______

a. Settleable solids

b. Volatile solids

c. Dissolved solids

d. Colloids

  • c. Dissolved solids

Q. What is the wastewater called as after physical and biological removal of solids?

a. Primary effluent

b. Primary treated water

c. Secondary treated water

d. Secondary treated wastewater

  • d. Secondary treated wastewater

Q. What is the monthly concentration of solids produced by secondary sewage effluent?

a. 20 mg/l

b. 30 mg/l

c. 40 mg/l

d. 35 mg/l

  • b. 30 mg/l

Q. Which of these is not an advantage of a trickling filter?

a. Temperature

b. Construction cost

c. Oxygen delivery

d. Electric systems

  • a. Temperature
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