Test: Tension, Compression & Shear - 1 - Mechanical Engineering MCQ

A straight bar having a constant cross-sectional area A, length L and weight W is hanging vertically. If E is the Young’s modulus of the material, total increase in length of the bar due to its own weight only is

In a composite system subjected to temperature rise and with ends constrained to remain together, the component having lower value of coefficient of linear expansion will experience a

All of the following statements are correct, except.

A steel rod passes through a brass tube which is closed by thin rigid washers and fastened by nuts screwed to the rod. Which type of stress will be induced in the tube when the nut is tightened on the bolt?

Two wires of different materials but of same diameter are connected end to end and a force is applied which stretches them by 1 cm. The two wires will have the

A steel wire ( E = 200 GPa) of sectional area 10 x 10^-5 m² is to be extended to twice its initial length. To accomplish this task, the two ends of the wire should be pulled by a force of

A steel rod of length 2 and diameter d, fixed at both ends is uniformly heated to a temperature rise of ΔT. The Young’s modulus is E and the coefficient of linear expansion is α. The thermal stress in the rod is