Q. _________ is the removal of excess surface water from the land to enhance crop growth.

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Q. Which of the following is not correct with respect to installing the drainage system in the waterlogged land?

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Q. Which of these is negative effect owing to the drier soil conditions?

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

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Q. Which of these is a positive effect owing to the discharge?

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Q. What is the time required for the depletion of oxygen in soil by waterlogging?

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Q. What is the average land coverage of vertisols in Ethiopia?

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Q. What is the power of diminishment of van der Waals force with respect to distance?

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Q. What is the device used to prevent sewer gases from entering the buildings?

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Q. The traps should be of self cleansing pattern.

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Q. The European WC contains attached trap.

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Q. _________ is constructed outside the building to carry wastewater discharge.

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Q. What is the minimum depth of water required in gully trap?

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Q. Indian water closet generally uses ______

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Q. What is P. trap made of?

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Q. _________ is similar to P. trap.

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Q. ______ is provided on the floor to collect wastewater from various sources like sinks.

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Q. What is the minimum depth of water seal in floor trap?

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Q. At the last main hole of building sewerage, __________ is provided.

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Q. How much is the water seal in intercepting trap?

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