In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always________________?

A. Zero
B. Tensile
C. Compressive
D. Tensile or compressive

The maximum value of hoop compression in a dome is given by___________________?

A. Wr / 4d
B. Wr/2d
C. Wr/d
D. 2wr/d

The purpose of reinforcement in prestressed concrete is________________?

A. To provide adequate bond stress
B. To resist tensile stresses
C. To impart initial compressive stress in concrete
D. All of the above

Most common method of prestressing used for factory production is________________?

A. Long line method
B. Freyssinet system
C. Magnel-blaton system
D. Lee-macall system

Prestress loss due to friction occurs________________?

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

High carbon content in the steel causes_______________?

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

Ultimate strength of cold drawn high steel wires_______________?

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

Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than__________________?

A. 35 mpa and 42 mpa
B. 42 mpa and 35 mpa
C. 42 mpa and 53 mpa
D. 53 mpa and 42 mpa

Stress strain curve of high tensile steel_______________?

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

Which of the following has high tensile strength ?

A. Plain hot rolled wires
B. Cold drawn wires
C. Heat treated rolled wires
D. All have same tensile strength