In Hoyer’s system the projection of plugs left in concrete exceeds beyond _______

The chemical pre stressing is also called as _______

The transfer of prestress of concrete is achieved by _______

The degree of expansion can be controlled by varying the conditions of _______

The basic chemical substance used for pre stressing forces in concrete member is _______

The estimation of the current, voltage and power requirements of the transformer are for _______

The concrete dams are constructed using which?

The Freyssinet system of post tensioning anchorages was developed in _______