theory-of-structures civil-engineering question and answers -Page 10

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Theory of Structures problems

1. is the equation for Euler's crippling load if
Options
A. both the ends are fixed
B. both the ends are hinged
C. one end is fixed and other end is free
D. one end is fixed and other end is hinged.

2. The ratio of the length and diameter of a simply supported uniform circular beam which experiences maximum bending stress equal to tensile stress due to same load at its mid span, is
Options
A.
B.
C.
D.
E. 1.0

5. A cantilever of length 2 cm and depth 10 cm tapers in plan from a width 24 cm to zero at its free end. If the modulus of elasticity of the material is 0.2 x 10⁶ N/mm², the deflection of the free end, is
Options
A. 2 mm
B. 3 mm
C. 4 mm
D. 5 mm
E. 6 mm

7. Pick up the correct statement from the following:
Options
A. The bending stress in a section is zero at its neutral axis and maximum at the outer fibres
B. The shear stress is zero at the outer fibres and maximum at the neutral axis
C. The bending stress at the outer fibres, is known as principal stress
D. The planes of principal stresses are inclined at 45� to the neutral plane
E. All the above.

8. If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 x 10⁵ N/mm²) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm², the angle of twist in radians, is
Options
A. 0.001
B. 0.002
C. 0.0025
D. 0.003
E. 0.005

9. The general expression for the B.M. of a beam of length l is the beam carries
Options
A. a uniformly distributed load w/unit length
B. a load varying linearly from zero at one end to w at the other end
C. an isolated load at mid span
D. none of these.

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