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Which of the following is INCORRECT for the characteristics and quality of a good Trap?

Which of the following is INCORRECT for the characteristics and quality of a good Trap? Correct Answer The internal and external surface should be Hard

Concept:

Traps

  • It may be defined as fittings placed at the ends of the soil pipes or waste (sullage) pipes to prevent the passage of foul gases from the pipes to the outside.
  • The traps maintain a water seal which is standing water between the pipe and the outside to facilitate this.
  • The water seal does not allow gases to escape to the outside of the pipe.
  • The efficiency of a trap will depend on the depth of the water seal. 

A good trap should possess the following qualities:

  • It provides a sufficient water seal with a large surface area.
  • Its interior should be smooth, so as not to obstruct the flow, and thus the trap should be self- cleansing.
  • It should be provided with an access door for cleaning.
  • It should be made of some non-absorbent material.

Hence, The internal and external surface should be hard is incorrect for the characteristics and quality of a good Trap.

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