1.) Explain why BCC, FCC and SQ lattice packing and features of grain structure affect the Ductility and Brittleness of parent metallic materials?Ans.Ductility is the mechanical property of a material. (It is the material’s ability to deform under the tensile stress without fracture). So it is depends on the atoms how they arranged in a lattice and its grain size. The ability to absorb the energy of the impact and fracture resistance depends on the arrangement of the atoms in a lattice and features of grain structure.2.)What is the difference between Pipe and Tube?Ans· Tube is defined by Outer diameter and Wall thickness (OD and WT). While Pipe is defined by Inner diameter (ID).Example:2 inch pipe have 2.375 inch outer diameter, where 2 inch tube have same 2 inch outer diameter.· Tube is easily shaped by bending, where Pipe needs some mechanical work to shape it.· Tube is tight then Pipe.· Tube is applicable to non cylindrical sections like Square and Rectangular.Ex. Iron Pipe, Carbon Tube, Steel Tube etc.3.)What does thermal diffusivity of metals signify.Ans: Thermal diffusivity is associated with the speed of propagation of heat into solids during changes in temperature with time.4.)Which is the common element between brass and bronze?Ans: Copper.5.)How is ceramic defined ?Ans: It is a solid formed by combination of metallic and non-metallic elements.6.)What is the difference between isotropic material and homogeneous material ?Ans: In homogeneous material the composition is same throughout and in isotropic material the elastic constants are same in all directions.
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