Concrete Technology and Design of Concrete Structures
Stress strain curve of high tensile steel

does not show definite yield point but yield point is defined by 0.2% proof stress
does not show definite yield point but yield point is defined by 2% proof stress,
has a definite yield point
does not show definite yield point but yield point is defined by 0.1% proof stress

ANSWER DOWNLOAD EXAMIANS APP

Concrete Technology and Design of Concrete Structures
In prestressed concrete

both forces of tension and compres-sion as well as lever arm remain unchanged
forces of tension and compression change but lever arm remains unchanged
both forces of tension and compres-sion as well as lever arm change
forces of tension and compressions remain unchanged but lever arm changes with the moment

ANSWER DOWNLOAD EXAMIANS APP