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MCQs 1: According to Whitney’s theory, depth of stress block for a balanced section of a concrete beam is limited to_______________?

0.43 d 0.537 d 0.68 d 0.85 d
Answer Explanation

MCQs 2: As per Whitney’s theory, the maximum moment of resistance of the balanced section of a beam of width b and effective depth d is given by_______________?

^acybd2 ^acybd2 0.185acybd2 0.43acybd2
Answer Explanation

MCQs 3: Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to_____________?

deflect downward deflect upward deflect downward or upward none of the above
Answer Explanation

MCQs 4: A beam curved in plan is designed for_______________?

bending moment and shear bending moment and torsion shear and torsion bending moment, shear and torsion
Answer Explanation

MCQs 5: In a spherical dome the hoop stress due to a concentrated load at crown is_______________?

compressive everywhere tensile everywhere partly compressive and partly tensile zero
Answer Explanation

MCQs 6: In prestressed concrete______________?

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

MCQs 7: Normally prestressing wires are arranged in the_______________?

upper part of the beam lower part of the beam center anywhere
Answer Explanation

MCQs 8: Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?

elastic shortening of concrete shrinkage of concrete creep of concrete loss due to friction
Answer Explanation

MCQs 9: Which of the following has high tensile strength ?

plain hot rolled wires cold drawn wires heat treated rolled wires all have same tensile strength
Answer Explanation

MCQs 10: Stress strain curve of high tensile steel_______________?

has a definite yield point does not show definite yield point but yield point is defined by 0.1% proof stress 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
Answer Explanation

MCQs 11: Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than__________________?

35 MPa and 42 MPa 42 MPa and 35 MPa 42 MPa and 53 MPa 53 MPa and 42 MPa
Answer Explanation

MCQs 12: Ultimate strength of cold drawn high steel wires_______________?

increases with increase in diameter of bar decreases with increase in diameter of bar does not depend on diameter of bar none of the above
Answer Explanation

MCQs 13: High carbon content in the steel causes_______________?

decrease in tensile strength but increase in ductility increase in tensile strength but decrease in ductility decrease in both tensile strength and ductility increase in both tensile strength and ductility
Answer Explanation

MCQs 14: Prestress loss due to friction occurs________________?

only in post-tensioned beams only in pretensioned beams in both post-tensioned and preten-sioned beams none of the above
Answer Explanation

MCQs 15: Most common method of prestressing used for factory production is________________?

Long line method Freyssinet system Magnel-Blaton system Lee-Macall system
Answer Explanation

MCQs 16: The purpose of reinforcement in prestressed concrete is________________?

to provide adequate bond stress to resist tensile stresses to impart initial compressive stress in concrete all of the above
Answer Explanation

MCQs 17: The maximum value of hoop compression in a dome is given by___________________?

wR / 4d wR/2d wR/d 2wR/d
Answer Explanation

MCQs 18: In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always________________?

zero tensile compressive tensile or compressive
Answer Explanation

MCQs 19: In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively_______________?

compressive and tensile tensile and compressive both compressive both tensile
Answer Explanation

MCQs 20: The effect of creep on modular ratio is__________________?

to decrease it to increase it either to decrease or to increase it to keep it unchanged
Answer Explanation

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