Question

Consider the following statements:
P. Volume of specimen under uniaxial compression remain constant upto elastic limit.
Q. Brittle materials fails perpendicular to the axis of the bar under torsion.
R. Proportional limit, yield point and fracture point can be assumed same for mild steel specimen.
The correct option for above statements is:

• A. P - True, Q - False, R - True
• B. P - True, Q - True , R - True
• C. P - True, Q - True, R - False
• D. P - False, Q - False, R - False

Answer 1

The correct option is D P - False, Q - False, R - False

Volume of specimen under uniaxial compression decreases during compression in elastic range.
Brittle material fails at ${45}^{\circ }$ angle under torsion (hellicoidal failure).