Question

Choose the correct statement(s) from the following:

• A. Waste water from sinks, baths, etc. enters through the top inlet of a gully trap, while foul water from sweeping of rooms or courtyards enters from side inlet.
• B. Anti-siphon traps have a reduced water-way at the inlet side, while the outlet being larger prevents the pipe from filling full and causing siphonic action.
• C. Intercepting traps prevent foul gases from street sewer to enter into the house.
• D. P, Q and S traps are classified according to their shape.

Hint:

Drainage traps are classified based on their purpose: gully for floor waste, anti-siphon to avoid siphonic action, intercepting to block sewer gases, and P/Q/S traps by shape.

Answer 1

The Correct Option is A, B, C, D

Step 1: Statement (A).
A gully trap receives waste water from baths, sinks, and washbasins via the top inlet, while foul water from courtyards or floors is connected through the side inlet. This statement is true.

Step 2: Statement (B).
Anti-siphon traps are designed with a narrower inlet water-way and a larger outlet, ensuring the pipe does not completely fill with water and thus prevents siphonic action. This statement is true.

Step 3: Statement (C).
Intercepting traps are installed at the junction of house drain and street sewer. Their purpose is to block foul gases from the sewer from entering the house drainage system. This statement is true.

Step 4: Statement (D).
P-traps, Q-traps, and S-traps are named after their shapes, which resemble the letters P, Q, and S respectively. This statement is true. \[ \boxed{\text{All statements (A), (B), (C), and (D) are correct.}} \]