The tensioning of oval section ribbed wires with an ultimate tensile strength was adopted in _______

The Hoyer’s method of prestressing is done by _______

When the concrete attains sufficient strength, which elements are released?

In thermo electric pre stressing, heating the bars is done to a temperature of _______

In post tensioning, the concrete units are cast by _______

The commonly used mechanical devices used in the following statement.

The electrical devices are commonly used for tensioning of _______

The chemical pre stressing is generally suited for elements like _______