After the tensioning operation, the space between the tendons and the ducts are _______

Which is one of the systems used for pretensioning?

The concrete dams are constructed using which?

In thermo electric pre stressing, the elongation is observed in case of _______

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

In Lee-McCall system, the prestressing tendons are in the form of _______

The chemical pre stressing is generally suited for elements like _______

The commonly used mechanical devices used in the following statement.