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You Are On Multi Choice Question Bank SET 304

15201. Fatigue strength of a material can not be increased by

15202. Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal

15203. Out of the following the refractive index is the highest for

15204. Function of blow down valve in a boiler is to

15205. Insulation of liquid surface can be achieved by __________ on top of its surface.

15206. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50 wt% B is

15207. Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

15208. Cadmium in zinc leach liquor is removed by cementation using

15209. In electrical resistance welding, distortion results from the use of improper

15210. The conventional mechnical transducer, which converts pressure signal to displacement signal is

15211. A fuse wire is characterized by

15212. Austempering of steel requires.it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to

15213. A compact estimate about the amount of materials handling between various work stations is obtained from the

15214. Lead is poured into the joint between two- __________ pipes.

15215. The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6 )

15216. Age hardening is connected with

15217. With decrease in the grain size of a material, its creep resistance

15218. __________ rubber is generally used for making 'O' rings used for vacuum sealings.

15219. Gross national product (GNP) means the total value of __________ in a country.

15220. Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.

15221. The co-ordination number in simple cubic structure is

15222. Out of the following surfaces, the emis-sivity will be minimum for

15223. The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the

15224. The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

15225. __________ the exhaust gas is an indication of the incomplete combustion of fuel.

15226. Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be

15227. Frost formation on the evaporator tubes in the domestic refrigerators

15228. Function of feed check valve in a boiler is to

15229. Ganister contains maximum percentage of

15230. Nitrogen is not an essential component of

15231. In inventory control theory, the economic order quantity (EOQ) is the

15232. The main charge in blast furnace is usually

15233. The atmospheric temperature during melting of ice/snow (in the atmosphere)

15234. At room temperature, F.C.C. crystal structure is observed in

15235. The basic function of the drum in a boiler is to

15236. In the preparation of ammonia which is used as drying agent

15237. Colloids can be purified by

15238. The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

15239. Maximum carbon content in cast iron is __________ percent.

15240. Screws are specified by their __________ diameters.

15241. The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material.

15242. A material being tested for endurance strength is subjected to the __________ load.

15243. With increase in pressure, the latent heat of steam

15244. 'Flare tower' used in industry is meant for

15245. Which of the following has the highest modulus of elasticity (about 7 x 106 kg/cm2) ?

15246. Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to

15247. All radiations falling on a black body are

15248. Styrofoam is the commercial name of

15249. Ceramic materials are

15250. Dryness fraction of dry steam is

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