29251. Young's modulus of a material is the measure of its
29252. Which of the following is not used as a bearing material ?
29253. Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than
29254. Water flow in the river during flood can be categorised as the __________ flow.
29255. Basicity [%Cao + %MgO/% SiO2) of the slag in Indian blast furnace is in the range of
29256. Sewage is not an excellent medium for the growth of
29257. Which of the following pair is correctly matched?
29258. Rate of chemical reaction is not much affected, if the reactants are in __________ form.
29259. Materials used for making permanent magnets containing iron and nickel are made by __________ technique.
29260. Lubrication is done to control
29261. Lead is most readily dissolved in
29262. Which of the following is a synthetic abrasive ?
29263. Dezincification is a form of corrosion, which specifically applies to
29264. Water hammer in pipelines results, when the flowing fluid
29265. The preferred alloying element for low temperature applications of steel is
29266. Out of the following, the dimensionless quantity is
29267. When a copper ball is heated, the largest percentage increase will be in its
29268. Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ?
29269. The most commonly used moderator in nuclear power plant is
29270. In an isochoric process,
29271. Coke is added in the blast furnace to
29272. A balanced draught boiler furnace employs __________ draught fan.
29273. Aluminium oxide (an abrasive) is used for grinding
29274. In a casting, cold shut defect is caused by
29275. Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when
29276. Which of the following metals can be extracted from its ore by both pyrometallur-gical as well as hydrometallurgical methods ?
29277. If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.
29278. Piezoelectric is a material
29279. Oxygen content below __________ percent in air contaminated with nitrogen does not support combustion and is unsafe for humane exposure.
29280. Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs.
29281. Production of one ton of steel plate in a modern integrated steel plant in India consumes about __________ kWh of electricity.
29282. Ceramic tips for the cutting tool are prepared from __________ powder.
29283. Fatigue strength of a metal is improved by
29284. Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2 . Then the outcoming steam will be
29285. An "orange peel" effect is observed
29286. The magnitude of water hammer caused in pipe flow is independent of the
29287. A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid ?
29288. A person admitted as a member in a society shall be issued with an identity card in Form
29289. Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution
29290. Which of the following is a disaccharide?
29291. Hardness & tensile strength of austenitic stainless steel can be increased by
29292. Which of the following metals occurs in nature in their free metallic state ?
29293. The most suitable material for a sewer for carrying storm water is
29294. In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be
29295. Sulphur is melted in the sulphuric acid plant most commonly by employing
29296. In 18-4-1 high speed steel, 18, 4 & 1 respectively denote the percentage of
29297. Role of a "collector" in froth floatation is to
29298. For the running of power generating turbines, the steam used should be
29299. Creep consideration is the most important in case of the
29300. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 x 10-16 m2 . S-1 and it is 1.94 x 10-14 m2 S-1 at 1200 K. The activation energy (in k. J.mole-1 ) for the diffusion of Ni in Cu is
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