84201. Martensite has needle like structure and is magnetic.
84202. A and B start business in partnership by investing Rs.3,000 and Rs.4,000 respectively.At the end of one year a profit of Rs.1,400 is made.How much amount would A get as his share of profit?
84203. In induction hardening, the depth of hardening is controlled by controlling the voltage.
84204. The austenite is a solid solution of carbon or iron carbide in gamma-iron.
84205. Which of the following display properties similar to that of steel?
84206. Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.
84207. When a low carbon steel is heated upto upper critical temperature
84208. The steel widely used for motor car crankshafts is
84209. Combined carbon in iron makes the metal
84210. Pearlite consists of
84211. Incoloy, Hastelloy and Vitallium are __________ temperature alloys.
84212. Quenching is not necessary when hardening is done by
84213. The iron ore in the charge of blast furnace acts as an iron bearing mineral.
84214. Beryllium bronze has
84215. The aluminium alloy, mainly used, for anodized utensil manufacture, is
84216. The toughness of a material __________ when it is heated.
84217. The coordination number of a face centred cubic space lattice is
84218. Spheroidal grey cast iron has graphite flakes.
84219. Bronze is an alloy of
84220. Chromium when added to steel __________ the tensile strength.
84221. Which of the following is added in low carbon steels to prevent them from becoming porous?
84222. A steel with carbon __________ is known as hypo-eutectoid steel.
84223. Free cutting steels
84224. The presence of hydrogen in steel causes
84225. Tin base white metals are used where the bearings are subjected to
84226. The charge of the blast furnace consists of
84227. The ability of a material to resist fracture due to high impact loads, is called
84228. The purpose of heat treatment is to
84229. An alloy of copper, tin and zinc is known as
84230. Which of the following iron exist between 910° C and 1403° C?
84231. The material in which the atoms are arranged chaotically, is called
84232. In basic bessemer process, the furnace is lined with
84233. Polyvinylchloride (PVC) is a __________ material.
84234. In a unit cell of close packed hexagonal space lattice, there are twenty four atoms.
84235. The steel produced by cementation process is known as __________ steel.
84236. Duralumin has better strength than Y-alloy at high temperature.
84237. Normalising of steel is done to
84238. A steel containing 12 to 14% chromium and 0.12 to 0.35% carbon is called martensitic stainless steel.
84239. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
84240. Shock resistance of steel is increased by adding
84241. In low carbon steels, __________ raises the yield point and improves the resistance to atmospheric corrosion.
84242. A steel containing 16 to 18% chromium and about 0.12% carbon is called
84243. The alloy, mainly used for corrosion resistance in stainless steels is
84244. The temperature required for full annealing in hyper-eutectoid steel is
84245. Which of the following metal shrinks most from molten state to solid state?
84246. A steel containing ferrite and pearlite is
84247. The defect which takes place due to imperfect packing of atoms during crystallisation is known as
84248. The upper critical point varies according to the carbon content in steel.
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