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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Q. _______ is generally used in food processing units.

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Q. _______ is used below sinks to prevent entry of foul gases.

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Q. How deep is the water seal in the water closet?

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Q. What is the preferred class of iron pipes?

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Q. Cast iron pipes should confirm to IS 1729.

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Q. What is the maximum specification for water cement ratio?

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Q. The mixing time of concrete prior to placement should not exceed 20 minutes.

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