29151. Direct conversion of thermal energy to electrical energy is facilitated by the
29152. The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.
29153. Angular displacement can be measured suitably by a
29154. Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
29155. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
29156. Addition of beryllium to copper is done mainly to produce a/an __________ alloy.
29157. The maintenance of body equilibrium and co-ordination of all muscular activities are done by
29158. Resilience of a material is important, when it is subjected to
29159. Existence of velocity potential implies that the fluid is
29160. The velocity of sound in air is independent of changes in its
29161. A boy weighing 110lb climbs up a 50 ft high vertical destination in 100 seconds. Horse power of the boy is __________ hp.
29162. Endurance is a measure of fatigue limit of a metal. Fatigue crack in nitrided machine parts originates
29163. Carbon percentage in high speed steel tool material is 0.6 to 1.0. The hardness of carbon tool steels is increased, when it is alloyed with
29164. Draft allowance given to patterns is for
29165. Which of the following welding processes employs the highest welding temperature ?
29166. The best criterion for analysing an economic investment is the
29167. Deformation band is absent in materials having __________ lattice crystal structure.
29168. Out of the following, the rays having the lowest wavelength is the
29169. A fine grained grinding wheel should not be used for grinding __________ materials.
29170. What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?
29171. The bulk modulus of a material with Poisson's ratio of 0.5 is equal to
29172. Compression ratio of an I.C. engine is the ratio of the
29173. Two stroke engine compared to a four stroke engine has
29174. Ferrites are __________ magnetic.
29175. The pH value is the measure of hydrogen ion concentration in a solution. The term pH stands for the __________ in the solution.
29176. The Al2 O3 content of cryolite in Hall-Heroult's cell is maintained between __________ percent.
29177. Number of electrons in the outermost shell of a semi-conductor material is
29178. The velocity at which individual particles from a fluidised bed are carried away by the fluid passing through it, is defined as the
29179. Tip of the match stick contains a mixture of
29180. Which of the following is not an ore of aluminium ?
29181. Mechanism/phenomenon involved in the improvement of fatigue strength of a material by shot peening is the
29182. Springs are not made of
29183. Which one of the following diseases is not a viral disease?
29184. Monazite deposits constitute an important source for the following metal.
29185. α-rays are
29186. Heat treatment of steel is done to mainly change its __________ properties.
29187. Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.
29188. In plants water and minerals are transported through
29189. Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that
29190. The hardness of a grinding wheel is specified by the
29191. Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)2 __________ with increasing temperature.
29192. While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ x Tm (where, Tm Melting temperature).
29193. The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.
29194. Carburettor in a spark ignition engine is used to
29195. __________ are not emitted by radioactive substances.
29196. A good abrasive
29197. Out of the following, __________ pipe is the least corrosion resistant.
29198. In order to protect the aquatic creatures, the dissolved oxygen content in fresh water stream should never be less than __________ PPm.
29199. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg) ?
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