This statement is true as KCU is more broadly used for impact strength while KCT and KCV are used in special cases.

Factor of safety tells us about how much load material can take before it fails. Basically, it states load carrying capacity of a material beyond actual load.

Strain is defined as deformation produced on a body due to stress divided by a length of body. Deformation due to longitudinal strength will have same unit as that of length of body refore, strain is a dimensionless quantity.

Talc, gypsum, topaz and diamond is correct order in which it is arranged in increasing order of hardness.

An axial load is applied to material to be tested when performing tensile testing and load is applied axially to body to be tested.

The relation between Young’s modulus, shear modulus and Poisson’s ratio are given by v = E/2G ? 1. Taking 1 on left side and rearranging we get G = E/2(1+v). Inserting values given in question answer comes out to be 2.69e¹⁰ N/m². Here E = Young’s modulus, G = shear modulus and v = Poisson’s ratio.

For components which on failing can be hazardous and can lead to serious injuries, death and financial loss, factor of safety should be taken equal to or more than 4.

Shear modulus is ratio of shear stress and shear strain. Therefore, if we simply multiply shear modulus and shear strain we will obtain shear stress. Hence final answer is 2.4e⁺¹⁰ x 6e^-5 which gives us 14.4e⁺⁵ N/m² as final answer.

The stress-strain curve for cemented tungsten carbide is a straight line as being a brittle material doesn?t have a plastic zone and refore, it fractures after a certain load is applied.

Principal stresses are maximum and minimum stresses which act on body and planes on which y act are called principal plane.