Explore topic-wise MCQs in Waste Water Engineering.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of these is the most efficient method to remove arsenic?

A. tGreen sand
B. tTehonoarz
C. tCoagulation by Iron hydroxide
D. tActivated alumina
Answer» C. tCoagulation by Iron hydroxide
Discussion
2.

Considering the total cost which of these is the most expensive method to remove arsenic?

A. tGreen sand
B. tActivated alumina
C. tCoagulation by Iron hydroxide
D. tTehonoarz method
Answer» B. tActivated alumina
Discussion
3.

Which of these methods is not used for the removal of arsenic?

A. tActivated alumina
B. tGreen sand
C. tCoagulation by Iron hydroxide
D. tActivated carbon
Answer» E.
Discussion
4.

What is the concentration of dissolved oxygen required to oxidize 1 ppm of manganese?

A. t0.2 ppm
B. t0.23 ppm
C. t0.30 ppm
D. t0.27 ppm
Answer» E.
Discussion
5.

What is the concentration of dissolved oxygen required to oxidize 1 ppm of iron?

A. t0.14 ppm
B. t0.12 ppm
C. t0.15 ppm
D. t0.20 ppm
Answer» B. t0.12 ppm
Discussion
6.

What is the method used to delay the precipitation of oxidized manganese and iron?

A. tAddition of phosphate
B. tAddition of nitrate
C. tAddition of hydrogen
D. tAddition of chloride
Answer» B. tAddition of nitrate
Discussion
7.

What is the safe limit for manganese in water?

A. t0.05
B. t0.15
C. t0.2
D. t0.25
Answer» B. t0.15
Discussion
8.

What is the safe limit for iron in the water?

A. t0.3 ppm
B. t0.5 ppm
C. t5 ppm
D. t1 ppm
Answer» B. t0.5 ppm
Discussion
9.

How is Iron removed?

A. tOxidation
B. tClarifier
C. tHRSCC
D. tUltrafiltration
Answer» B. tClarifier
Discussion
10.

If the water is brown in colour it indicates the presence of which of these?

A. tIron
B. tManganese
C. tArsenic
D. tBarium
Answer» B. tManganese
Discussion