Question

In a house drainage system, the pipe which is used to preserve the water seal of traps is called ______

(a) Waste pipe

(b) Rainwater pipe

(c) Vent pipe

(d) Anti-siphonage pipe

Answer 1

Right answer is (d) Anti-siphonage pipe

The best I can explain: In a house drainage system, the pipe which is used to preserve the water seal of traps is called anti-siphonage pipe. The vent pipe is provided to serve the purpose of ventilation of the system. The waste pipe carries only liquid waste. Rainwater pipe carries only rainwater.