In Gifford-Udall system, the number of methods for prestressing members is?

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

In Freyssinet system which element behaves as a guide?

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

In Gifford-Udall system, which method involves prestressing by H.T type tendon?

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

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

Hoyer’s system of pretensioning can be done for beams.