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