Which of these is a positive effect owing to the drier soil conditions?

Indian water closet generally uses __

What amount of H2S causes increased eye problems?

_______ is generally used in food processing units.

What is the depth of concrete required for half-round channels for surface drains?

_______ is used to clean blockage in the line.

What is the temperature condition required for hydrogen sulphide formation?

The entire system should be ventilation free.