The phenomena of reduction of stress in steel at a constant strain are known as _______

In 1886, Jackson of San Francisco applied for a patent in which prestress was introduced by _______

Which of the following basic concept is involved in the analysis of prestressed concrete members?

Development of early cracks in reinforced concrete is due to _______

Which of the following concrete offers pleasant appearance and durability?

The ratio between the creep strain and elastic strain of concrete is defined as _______

In the zone of anchorages the material preferred to minimize costs is _______

The compression in concrete and tension in steel are developed by?