Engineering Materials For the allotropic forms of iron, the points of arrest are The points of discontinuity The points where there is no further flow of metal The points where no further change occurs Constant for all metals The points of discontinuity The points where there is no further flow of metal The points where no further change occurs Constant for all metals ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Smelting is the process of All of these Removing the impurities like clay, sand etc. from the iron ore by washing with water Reducing the ore with carbon in the presence of a flux Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns All of these Removing the impurities like clay, sand etc. from the iron ore by washing with water Reducing the ore with carbon in the presence of a flux Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials Which of the following property is desirable for materials used in tools and machines? Malleability Ductility Plasticity Elasticity Malleability Ductility Plasticity Elasticity ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron. None of these Free graphite Both A and B Cementite None of these Free graphite Both A and B Cementite ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials A material is known as allotropic or polymorphic if it Exists in several crystal forms at different temperatures Has its atoms distributed in a random pattern Has a fixed structure under all conditions Responds to heat treatment Exists in several crystal forms at different temperatures Has its atoms distributed in a random pattern Has a fixed structure under all conditions Responds to heat treatment ANSWER DOWNLOAD EXAMIANS APP
Engineering Materials The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is Below recrystallization temperature 910°C 770°C 1050°C Below recrystallization temperature 910°C 770°C 1050°C ANSWER DOWNLOAD EXAMIANS APP
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