_____________ is used to reduce the time for hardening of concrete.

Air and water are the examples of _______

Specific weight of water at 4°C is ________ N/m3.

In simply supported beams, deflection is zero at _____

The maximum induced _______ stresses should be within the safe permissible stresses to ensure strength of the beam.

The land where all the water comes from _______

The slope is denoted by ___

Contour canals are also called as __

Cantilever scaffolding is also known as ________