Mechanical Engineering - Strength of Materials - Bending and Shear Stress in Beam and Torsion

Buy GATE - Mechanical Engineering Practice test pack

Question - 1

Moment of inertia of a semi-circle about its XX-axis is given by

  • A 0.22 r3
  • B 0.11 r4
  • C 0.2 r4
  • D 0.14 r4

Question - 2

The strength of the beam mainly depends on

  • A bending moment
  • B CG of the section
  • C section modulus
  • D All of these

Question - 3

If the bending moment is consistent there will be no stresses.

  • A compressive
  • B tensile
  • C shearing
  • D All of these

Question - 4

In the case of an I-section beam, maximum shear stress is at

  • A top of flange
  • B junction of flange and web
  • C middle of web
  • D None of the above

Question - 5

A shaft is subjected to torsion as shown in figure.

Which of the following figures represent the shear stress on the element LMNOPQRS?

  • A
  • B
  • C
  • D

Question - 6

The strength of a hollow shaft for the same length, material and weight is __________ a solid shaft.

  • A more than
  • B less than
  • C equal to
  • D None of these

Question - 7

In case of a circular section, the maximum shear stress is _______ per cent more than the mean shear stress

  • A 20
  • B 10
  • C 66
  • D 33

Question - 8

By pure bending of a beam, we meant that

  • A shear force in the beam is uniform throughout
  • B bending moment in the beam is uniform throughout
  • C bending moment in beam is zero
  • D shear force in beam is zero

Question - 9

Neutral axis of a beam is the axis at which

  • A the shear force is zero
  • B the moment of inertia is zero
  • C the bending stress is maximum
  • D the bending stress is zero

Question - 10

When a beam is loaded transversally the maximum compressive stress shall develop at

  • A the bottom fibres
  • B the neutral axis
  • C the top fibres
  • D None of these