Hydrogen sulphide is formed under __ conditions.

What is the preferred size of water closet pan?

In which of the months does the maximum sewage flow occur in India?

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

What is the angle between the drains and inspection manholes?

What is the temperature condition required for hydrogen sulphide formation?

What is the depth of brick masonry required in inspection chambers?

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