mechanical-engineering-engineering-materials Related Question Answers
101. The purpose of heat treatment is to
103. Which of the following iron exist between 910° C and 1403° C?
104. The material in which the atoms are arranged chaotically, is called
105. In basic bessemer process, the furnace is lined with
107. In a unit cell of close packed hexagonal space lattice, there are twenty four atoms.
108. The steel produced by cementation process is known as __________ steel.
110. Normalising of steel is done to
111. A steel containing 12 to 14% chromium and 0.12 to 0.35% carbon is called martensitic stainless steel.
112. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
113. Shock resistance of steel is increased by adding
114. In low carbon steels, __________ raises the yield point and improves the resistance to atmospheric corrosion.
115. A steel containing 16 to 18% chromium and about 0.12% carbon is called
116. The alloy, mainly used for corrosion resistance in stainless steels is
117. The temperature required for full annealing in hyper-eutectoid steel is
118. Which of the following metal shrinks most from molten state to solid state?
120. The defect which takes place due to imperfect packing of atoms during crystallisation is known as
122. A coarse grained steel
123. Duralumin contains
125. The addition of which of the following improves machining of copper?
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