The inside surface of formwork should be ____ so as to turn out a good concrete surface.

Identify the type of Arch given below.

_________ is an ordinary step of rectangular shape in plan.

In ________ arrangement, the treads and Risers of stones are provided is in case of timber steps.

In case of ___ stair, there is a well or hole or opening between the flights in the plan.

______________ consists of Steel angles or rolled Steel joists.

____________ has one end or both ends splayed in plan.

The ______ of formwork plays a significant role in the cost of concrete.