A. to provide adequate bond stress
B. to resist tensile stresses
C. to impart initial compressive stress in concrete
D. all of the above
Design of Concrete Structures
Design of Concrete Structures
A. Long line method
B. Freyssinet system
C. Magnel-Blaton system
D. Lee-Macall system
A. only in post-tensioned beams
B. only in pretensioned beams
C. in both post-tensioned and preten-sioned beams
D. none of the above
A. decrease in tensile strength but increase in ductility
B. increase in tensile strength but decrease in ductility
C. decrease in both tensile strength and ductility
D. increase in both tensile strength and ductility
A. increases with increase in diameter of bar
B. decreases with increase in diameter of bar
C. does not depend on diameter of bar
D. none of the above
A. 35 MPa and 42 MPa
B. 42 MPa and 35 MPa
C. 42 MPa and 53 MPa
D. 53 MPa and 42 MPa
A. has a definite yield point
B. does not show definite yield point but yield point is defined by 0.1% proof stress
C. does not show definite yield point but yield point is defined by 0.2% proof stress
D. does not show definite yield point but yield point is defined by 2% proof stress
A. plain hot rolled wires
B. cold drawn wires
C. heat treated rolled wires
D. all have same tensile strength
A. elastic shortening of concrete
B. shrinkage of concrete
C. creep of concrete
D. loss due to friction
A. upper part of the beam
B. lower part of the beam
C. center
D. anywhere
