The external file escaped stairs are generally made of ___

A Stair turning through three right angles is known as a ____ stair.

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

____________ is the clear vertical distance between the highest point on the intrados and springing line.

The column formwork consists of a box prepared from ______ separate sides.

___________ type of arch is constructed from ordinary un-cut bricks.

____________ arches can be constructed from ordinary bricks or purpose made bricks or soft bricks.

Identify the type of Arch given below.