1. Rupture stress is _____.
[A] Maximum load/original cross-sectional area
[B] Breaking stress
[C] Load at breaking point/neck area
[D] Load at breaking point/original cross-sectional area
Answer: Option C
2. If a material is subjected to a tensile load, then to avoid shear failure of a material along a plane inclined at 45degree to the direction of tensile stress, the material should have its shear strength at least equal to _____.
[A] Half the tensile strength
[B] Its tensile strength
[C] Its compressive strength
[D] Principle stress
Answer: Option A
3. Proof stress is _____.
[A] the safest stress
[B] used in connection with materials like mild steel
[C] Causes a specified permanent deformation in a material, usually 0.01% or less
[D] Does not exist
Answer: Option C
4. Ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stress of equal intensity, is _____.
[A] Young’s modulus
[B] Modulus of rigidity
[C] Bulk modulus
[D] All of the above
Answer: Option C
5. If a material expands freely due to heating it will develop _____.
[A] No stress
[B] Thermal stresses
[C] Bending stress
[D] Tensile stress
Answer: Option A