In a simple bending of beams, the stress in the beam varies
A. Linearly
B. Parabolically
C. Hyperbolically
D. Elliptically
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The moment of resistance of a balanced reinforced concrete beam is based on the stresses in
A. Steel only
B. Concrete only
C. Steel and concrete both
D. None of these
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The bending equation is
A. I M = y σ = R E
B. J T = R τ = I C θ
C. R M = J T = I C θ
D. I T = J τ = C θ R
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In a watch, the spring is used to store strain energy. This energy is released
A. To stop the watch
B. To run the watch
C. To change the time
D. All of these
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In a beam where shear force changes sign, the bending moment will be
A. Zero
B. Minimum
C. Maximum
D. Infinity
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A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be
A. Same
B. Double
C. Half
D. One-fourth
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The shear force diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, consists of
A. One right angled triangle
B. Two right angled triangles
C. One equilateral triangle
D. Two equilateral triangles
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Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in
A. Tension
B. Compression
C. Bearing
D. Any one of the above
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In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called
A. Creeping
B. Yielding
C. Breaking
D. Plasticity
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The direct stress induced in a long column is __________ as compared to bending stress.
A. Same
B. More
C. Less
D. Negligible
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The slenderness ratio is the ratio of
A. Area of column to least radius of gyration
B. Length of column to least radius of gyration
C. Least radius of gyration to area of column
D. Least radius of gyration to length of column
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The ratio of bulk modulus to Young's modulus for a Poisson's ratio of 0.25 will be
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The strain energy stored in a hollow circular shaft of outer diameter (D) and inner diameter (d) subjected to shear stress is
A. 2 C τ 2 ( D D 2 − d 2 ) × Volume of shaft
B. 2 C τ 2 ( D D 2 + d 2 ) × Volume of shaft
C. 4 C τ 2 ( D D 2 − d 2 ) × Volume of shaft
D. 4 C τ 2 ( D D 2 + d 2 ) × Volume of shaft
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Shear stress induced in a shaft subjected to tension will be
A. Maximum at periphery and zero at center
B. Maximum at center
C. Uniform throughout
D. None of the above
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The Young's modulus of a material is 125 GPa and Poisson’s ratio is 0.25. The modulus of rigidity of me material is
A. 30 GPa
B. 50 GPa
C. 80 GPa
D. 100 GPa
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When a body is subjected to a direct tensile stress (σ ) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle θ to the normal of the section is
A. σ sin 2 θ
B. σ cos 2 θ
C. 2 σ sin 2 θ
D. 2 σ cos 2 θ
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When a body is subjected to a direct tensile stress (σ ) in one plane, then normal stress on an oblique section of the body inclined at an angle θ to the normal of the section is
A. σ cos θ
B. σ cos 2 θ
C. σ sin θ
D. σ sin 2 θ
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In the below figure, the point C represents
A. Elastic limit
B. Upper yield point
C. Lower yield point
D. Breaking point
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The maximum deflection of a fixed beam carrying a central point load lies at
A. Fixed ends
B. Center of beam
C. 3 l from fixed ends
D. None of these
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When a bar of length 'l ' and diameter 'd' is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)
A. 2 E w l
B. 2 E w l 2
C. 2 E w l 3
D. 2 E w l 4
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