176. In a hardening process, the hypo-eutectoid steel is
177. The ratio of the volume occupied by the atoms to the total volume of the unit cell is called
178. Which of the following statement is incorrect about duralumin?
179. The property of a material which enables it to retain the deformation permanently, is called
180. Sulphur in cast iron
181. Cementite consist of
182. Cast iron is a ductile material.
183. Manganese is added in low carbon steel to
184. Beryllium bronze contains
185. The portion of the blast furnace below its widest cross-section is called
186. Gamma-iron occurs between the temperature range of
187. When filing or machining cast iron makes our hands black, then it shows that __________ is present in cast iron.
188. According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is
189. Wrought iron
190. In iron, the presence of carbon in free form is called graphite.
191. In a body centred cubic space lattice, there are nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre.
192. Which of the following is a case hardening process?
193. In a crystalline material, atoms are arranged in definite and orderly manner and form.
194. The austenitic stainless steel contains
195. The process used for relieving the internal stresses previously set up in the Metal and for increasing the machinability of steel, is
196. Steel containing upto 0.15% carbon, is known as
197. In a unit cell of a body centred cubic space lattice, there are __________ atoms.
198. The nuts and bolts are made from silicon steel.
199. Silicon in cast iron
200. The process which improves the machinability of steels, but lowers the hardness and tensile strength, is