TORSION

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

A torque wrench is used to measure how much force is applied to a bolt to ensure the bolt is not over stretched. What force does it measure?

• Compression

• Tension

• Torsion

• Shear

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

If the angle of twist is small, the length of the shaft and its radius will remain unchanged.

• True

• False

The shear strain, γ is zero at the outer boundary and reaches maximum γ_max at the axis of the shaft.

• True

• False

τ will vary from zero at the shaft’s longitudinal axis to a maximum value, τ_max at its outer surface.

• True

• False

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

A bar of circular cross-section of diameter D is subjected to torque T at B as shown in the figure given below. What is the angle of twist at A?

• Same as that at B

• Zero

• Twice as that at B

• Half as that of B