mechanical-engineering-engineering-materials Related Question Answers
153. The alloying element which reduces the formation of iron sulphide in steel is
154. For a steel containing 0.8% carbon
155. In high speed steels, manganese is used to tougher the metal and to increase its
156. The machinability of aluminium increases when __________ is added to aluminium.
157. Body centred cubic space lattice is found in
158. When a low carbon steel is heated upto lower critical temperature,
160. Corrosion resistance of steel is increased by adding nickel and chromium.
161. The silicon steel is widely used for
162. Ball bearings are, usually, made from
163. Macro-structure of a material is, generally, examined by
164. Aluminium has low density and addition of silicon improves its fluidity and therefore, its castability.
165. Which of the following property is desirable for materials used in tools and machines?
167. The metal suitable for bearings subjected to heavy loads, is
168. The compressive strength of cast iron is __________ that of its tensile strength.
169. When a steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of
171. The addition of copper to aluminium possesses maximum strength after heat treatment and age-hardening
172. Nickel when added to copper improves
173. In the lower part of the blast furnace (zone of fusion), the temperature is
174. Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
175. Inconel contains
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