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

The tensile stresses developed in steel by the expansion of concrete are about _______

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

The yield stress relieved in wires is about _______

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

The electrical devices are commonly used for tensioning of _______

Which of the following is a disadvantage of Freyssinet system?

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