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