In post tensioning, the concrete units are cast by _______

Which is one of the systems used for pretensioning?

The chemical pre stressing is also called as _______

The applied force should be measured accurately in hydraulic devices while?

The estimation of the current, voltage and power requirements of the transformer are for _______

The commonly used mechanical devices used in the following statement.

The cables are formed by arrangement of wires or strands in _______

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