Environmental Engineering (3160611) MCQs

MCQs of House Drainage

Showing 51 to 53 out of 53 Questions
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51.

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:

Option (b)

52.

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:

Option (a)

53.

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:

Option (c)

Showing 51 to 53 out of 53 Questions
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