Which of the following is not a classification of traps based on their shape?

Which of the following is not a component of plumbing water supply system?

Partially ventilated single stack system is the modified form of ______

The single stack system if effective only in the case when the traps are filled with water seal of depth not less than _…

One pipe system is cheaper than the single stack system for the drainage of buildings.

Inferential meters can be used for both low and high flows.

Which of the following statements regarding systems of plumbing for drainage of buildings is not correct?

The outlet pipe in the septic tank is kept about _____ lower than the inlet pipe.