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Drainage - Interview Questions

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Here is a list of 20 interview questions on plumbing:

1) What is a single stack & Double stack system?

Ans) In a single stack system we have only one main riser for soil pipe and waste pipe connected with air vent pipe.

In a double stack system, we have 2 independent risers, one for waste pipe and one for soil pipe. Both the risers are connected with air vent pipes.

2) What are aerators?

Ans) Aerators are used for velocity breaking and venting.

3) After how many floors are velocity breakers provided?

Ans) Velocity breakers are provided after every 4 floors.

4) Where are the vent pipes provided or the vents are required?

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