BES 3: Final Exam

Modulus of rigidity is the ratio of ______

• Lateral strain and linear strain

• Linear stress and lateral strain

• Shear stress and shear strain

• Shear strain and shear stress

This is an example of what type of force?

• Shear

• Torsion

• Compression

• Tension

• Bending

Which parameter is not related angle of twist?

• Member's length

• Polar moment of inertia

• Shear modulus

• Elastic modulus

What is the form of displacement due to torsion?

• Axial strain

• Shear strain

• Elongation

• Contraction

Torsion applied to a circular shaft results in a twist of 1° over a length of 1m. The maximum shear stress introduce is 120N/mm2 . What is the radius of the shaft?

• 300/π

• 180/π

• 90/π

• 270/π

Twisting moment is a moment applied in the plane of cross section acting

• Along longitudinal

• About longitudinal axis

• About neutral axis

• None of the above

Polar moment of inertia is

• The MI about an axis in the plane of cross section

• The product of inertia

• About the axis of member

• None of the above

A circular shaft is subjected to torsion. The shear stress in the cross section

• Varies parabolically with the maximum stress occuring at the centre

• Uniform over the section

• Varies linearly with the radius with the maximum at the circumference and zero at the centre

• None of the above

A shaft is simultaneously subjected to a torque T and bending moment M. The ratio of maximum shear stress to bending stress is

• M/T

• T/M

• 2M/T

• T/2M

In the torsion equation the term J/R is called

• shear modulus

• section modulus

• polar modulus

• none of these