Mechanical Engineering :: Engineering Materials
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In the middle part of the blast furnace (zone of absorption), the temperature is
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The temperature in the upper part of the blast furnace (zone of reduction) is __________ that of the middle part.
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The temperature point at which the change starts on heating the steel is called
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In a face centred cubic space lattice, there are
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Face centred cubic space lattice is found in gamma-iron, aluminium, copper, lead, silver and nickel.
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Which of the following is a point imperfection?
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The process in which carbon and nitrogen both are absorbed by the metal surface to get it hardened is known as
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A.
nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre
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B.
fourteen atoms out of which eight atoms are located at the corners of the cube and six atoms at the centres of six faces
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C.
seventeen atoms out of which twelve atoms are located at the twelve corners of the hexagonal prism, one atom at the centre of each of the two hexagonal faces and three atoms are symmetrically arranged in the body of the cell
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D.
none of the above
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