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You Are On Multi Choice Question Bank SET 323

16151. The following is employed as sacrificial anode to provide cathodic protection to ships, pipelines and storage tanks.

16152. Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

16153. Increasing the carbon content of steel

16154. __________ metal is used as a bearing liner material.

16155. For an ideal gas, Cp - Cv is

16156. Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.

16157. Brazing filler metal used for joining steel plates

16158. Fine grain size in metallic material will

16159. Electrometallurgical methods of metal extraction is normally used for those metals

16160. Lowering of recrystallisation temperature of metals can be achieved by its

16161. An example of a buffer solution is

16162. A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.

16163. Name the safety device used to protect the boiler, when the water level falls below a minimum level.

16164. Cold chiesel's hammers are made of

16165. In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be

16166. Atomic __________ is a whole number for an element.

16167. Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.

16168. Highest cutting speed is achieved by the __________ tool material.

16169. Tin plated iron and galvanised iron are generally produced by

16170. In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of

16171. Dezincification is a form of corrosion espe-cially applicable to

16172. Which of the following materials is not suitable as a die material for wire drawing?

16173. By X-ray diffraction, it is not possible to determine the

16174. In continuous casting process, graphite moulds are used with a view to providing

16175. Energy required to compress a hot gas as compared to cold gas will be

16176. In the commercial production of which of the following metals, matallothermic reduction is used ?

16177. New water wells are disinfected with chlorine in the form of

16178. In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

16179. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas)

16180. A material lacking in toughness is usually termed as

16181. The basic constituent of vegetable oils is

16182. Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the pressure of steam.

16183. Which of the following terminology is used for the temperature at which new grains are formed in a metal ?

16184. When a tuning fork vibrates, the waves produced in the fork are

16185. Fatigue limit of a material should not be increased by

16186. For a fixed cross-sectional area, the most economical channel section has maximum

16187. Pellets are not as popular a burden as sinter in the iron blast furnace, because of their

16188. A form of stress corrosion failure termed as 'season cracking' is generally observed in

16189. A material subjected __________ must have high resilience.

16190. Triple point of water is

16191. Solute atoms which cause yield point phenomenon in mild steel are/is

16192. __________ pipe is the most suitable for carrying sanitary drainage.

16193. Liquor poisoning generally occurs due to the presence of __________ in it.

16194. EMI stands for

16195. More than 95% of __________ is present in corrundum.

16196. Blow off cock is provided in steam boiler to

16197. Work hardening of a material

16198. Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium

16199. Thermit welding is categorised as the __________ welding.

16200. A gas having a negative Joule-Thompson co-efficient, when throttled, will

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