Explore topic-wise MCQs in Waste Water Engineering.

This section includes 26 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.

What is the chemical used to prevent H2S gas formation from Ferric chloride?

A. Magnesium hydroxide
B. Sodium hydroxide
C. Oxygen injection
D. Ferric nitrate
Answer» D. Ferric nitrate
Discussion
2.

What is the chemical used to prevent H2S gas formation from Sodium hydroxide?

A. Ferric chloride
B. Magnesium hydroxide
C. Ferric nitrate
D. Calcium nitrate
Answer» D. Calcium nitrate
Discussion
3.

What is the chemical used to prevent H2S gas formation from Magnesium hydroxide?

A. Calcium nitrate
B. Ferric nitrate
C. Oxygen injection
D. Carbon injection
Answer» B. Ferric nitrate
Discussion
4.

What amount of H2S causes increased eye problems?

A. 1 ppm
B. 2 ppm
C. 3 ppm
D. 4 ppm
Answer» E.
Discussion
5.

What is the odour threshold limit of H2S gas?

A. 0.0008 ppm
B. 0.008 ppm
C. 0.08 ppm
D. 0.8 ppm
Answer» C. 0.08 ppm
Discussion
6.

What is the limit of H2S exposure for 30 minutes?

A. 0.5 ppm
B. 1 ppm
C. 1.5 ppm
D. 2 ppm
Answer» E.
Discussion
7.

What is the exposure limit of H2S in a day?

A. 2 ppm
B. 1 ppm
C. 0.5 ppm
D. 0.1 ppm
Answer» E.
Discussion
8.

The rate of release of H2S is high at the points of ______

A. Low velocity
B. Low flow
C. Low turbulence
D. High turbulence
Answer» E.
Discussion
9.

H2S gas is _______ to generate sulphuric acid.

A. Oxidised
B. Reduced
C. Oxidised and reduced
D. Sulphonated
Answer» B. Reduced
Discussion
10.

H2S gas is denser than air.

A. True
B. False
Answer» B. False
Discussion
11.

H2S is intoxicant in nature.

A. True
B. False
Answer» C.
Discussion
12.

WHAT_IS_THE_EXPOSURE_LIMIT_OF_H2S_IN_A_DAY??$

A. 2 ppm
B. 1 ppm
C. 0.5 ppm
D. 0.1 ppm
Answer» E.
Discussion
13.

What is the odour threshold limit of H2S gas?$

A. 0.0008 ppm
B. 0.008 ppm
C. 0.08 ppm
D. 0.8 ppm
Answer» C. 0.08 ppm
Discussion
14.

What_is_the_limit_of_H2S_exposure_for_30_minutes?$

A. 0.5 ppm
B. 1 ppm
C. 1.5 ppm
D. 2 ppm
Answer» E.
Discussion
15.

What is the chemical used to prevent H2S gas formation from Ferric chloride?

A. Magnesium hydroxide
B. Sodium hydroxide
C. Oxygen injection
D. Ferric nitrate
Answer» D. Ferric nitrate
Discussion
16.

What is the chemical used to prevent H2S gas formation from Sodium hydroxide?

A. Ferric chloride
B. Magnesium hydroxide
C. Ferric nitrate
D. Calcium nitrate
Answer» D. Calcium nitrate
Discussion
17.

What is the chemical used to prevent H2S gas formation from Magnesium hydroxide?

A. Calcium nitrate
B. Ferric nitrate
C. Oxygen injection
D. Carbon injection
Answer» B. Ferric nitrate
Discussion
18.

What amount of H2S causes increased eye problems?

A. 1 ppm
B. 2 ppm
C. 3 ppm
D. 4 ppm
Answer» E.
Discussion
19.

The rate of release of H2S is high at the points of _____?

A. Low velocity
B. Low flow
C. Low turbulence
D. High turbulence
Answer» E.
Discussion
20.

What is the temperature condition required for hydrogen sulphide formation?

A. Warm
B. Cold
C. Extreme cold
D. Intermediate
Answer» B. Cold
Discussion
21.

What is the flow velocity condition required for the formation of hydrogen sulphide?

A. Low
B. Medium
C. High
D. Rapid
Answer» B. Medium
Discussion
22.

Hydrogen sulphide is formed under ______ conditions.

A. Aerobic
B. Anaerobic
C. Anaerobic and aerobic
D. Any
Answer» C. Anaerobic and aerobic
Discussion
23.

H2S gas is _______ to generate sulphuric acid.

A. Oxidised
B. Reduced
C. Oxidised and reduced
D. Sulphonated
Answer» B. Reduced
Discussion
24.

H2S gas is denser than air.

A. True
B. False
Answer» B. False
Discussion
25.

_______ corrodes internal walls of sewers.

A. Hydrochloric acid
B. Sulphuric acid
C. Sulphur dioxide
D. Carbon dioxide
Answer» C. Sulphur dioxide
Discussion
26.

H2S is intoxicant in nature.

A. True
B. False
Answer» C.
Discussion