____________ is used to measure the flow velocity across a cross-section with a known area.

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

The strength or effectiveness of a water seal is represented by its _____

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

The depth of a sludge soak pit varies from _________

The diameter of main service pipe may vary from _______

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

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