Pick up the correct statement in case of water supply.

Brick walls are measured in sq. m if the thickness of the wall is

For 2nd class building rain water pipes shall be of .............................finished painted.

The concrete used for cement concrete roads is of grade .......................

.....................................type of excavator is used for digging at or below the operating level.

The detention period in a septic tank is assumed

Pick up the correct statement in case of water supply.

For obtaining the environmental lead for sandy track, lead is multiplied by ______.</p>

The plinth area of a building not includes