The Hoyer’s method of prestressing is done by _______

The linear expansion of the cement in chemical pre stressing is about _______

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

The Freyssinet system of prestressing involves the arrangement of wires of number?

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

In which place thermo electric pre stressing found to be more economical?

The hydraulic jacks are the simplest and most widely used devices for providing prestress of _______

Which is one of the systems used for pretensioning?