The trap which is provided to disconnect the house drain from the street sewer is called

For the construction of buildings, the subheads of the estimate are

Pick up the correct statement from the following:

The assumption on which the trapezoidal formula for volumes is based, is

The concrete work for the following part of the building of specified thickness is measured in square meters

Pick up the incorrect statement from the following:

Pick up the correct statement from the following:

...................culverts have a concrete (sometimes other materials can be used too) floor allowing the water to flow…

The drainage layer is .....................