Engineering Materials A material is known as allotropic or polymorphic if it Exists in several crystal forms at different temperatures Has a fixed structure under all conditions Has its atoms distributed in a random pattern Responds to heat treatment Exists in several crystal forms at different temperatures Has a fixed structure under all conditions Has its atoms distributed in a random pattern Responds to heat treatment ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Constantan an alloy used in thermocouples is an alloy of Copper and iron Copper and tin Copper and nickel Copper and zinc Copper and iron Copper and tin Copper and nickel Copper and zinc ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Corrosion resistance of steel is increased by adding Chromium and nickel Aluminium and zinc Tungsten and sulphur Nickel and molybdenum Chromium and nickel Aluminium and zinc Tungsten and sulphur Nickel and molybdenum ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials White cast iron has All of these High compressive strength Carbon in the form of carbide Low tensile strength All of these High compressive strength Carbon in the form of carbide Low tensile strength ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials For the allotropic forms of iron, the points of arrest are The points where there is no further flow of metal The points of discontinuity Constant for all metals The points where no further change occurs The points where there is no further flow of metal The points of discontinuity Constant for all metals The points where no further change occurs ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Following elements have face-centered cubic structure Mg, Zn, Ti, Zr, Br, Cd A iron (below 910°C and between 1400 to 1539°C), W Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt All of these Mg, Zn, Ti, Zr, Br, Cd A iron (below 910°C and between 1400 to 1539°C), W Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt All of these ANSWER DOWNLOAD EXAMIANS APP