1. Biological shield in a nuclear reactor is generally provided to protect against the

2. Ingrannular corrosion occurs __________ stainless steel.

3. The standard instrument used for calibrating the load applied by universal testing machine is called

4. Resilience of a material is important, when it is subjected to

5. Dry saturated steam can be converted into superheated steam by

6. L.D. converters are generally lined with

7. The ability of a substance to assume two or more crystalline structure is called

8. Machinability of hard alloys & tool steels is improved by

9. The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

10. Gas turbine normally employs a constant __________ cycle.

11. The substance used as a smoke screen in warfare is

12. Old cycle handles are coated with nickel using

13. The activity of pure hydrogen gas at 1000°C and 5 atm pressure

14. If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

15. Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher

16. A common disinfectant used in village wells for disinfection of water is

17. Use of water as a manometric liquid suffers from the disadvantage of its

18. Which of the following fastening devices has its both ends threaded?

19. Out of the following, __________ waves have the largest wavelength.

20. Which of the following metals can be extracted from its ore by both pyrometallur-gical as well as hydrometallurgical methods ?

21. One of the methods of purification of leach liquor is ion exchange, which involves

22. Which of the following forces does not act on a fluid at rest?

23. Permanent set in a material is produced by subjecting it to

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

25. Holes for rivetting purposes should be preferably made by

26. Exposure to __________ accelarates the degradation of plastics.

27. Which of the following equipments is used for liquid dispersion?

28. Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

29. With increase in impurities in metals, their corrosion resistances

30. Uniform ramming of sand in green sand moulding process leads to

31. Pick out the wrong statement. Termination of polymerisation reaction occurs, if the

32. Statistical quality control was developed by __________ , an American scientist during world war II.

33. Most important property of steels for use in automobile bodies is the

34. The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.

35. In a titration involving weak acid and strong base, the preferred indicator is

36. Projection welding & stud welding is categorised as the __________ welding.

37. Filler metal is not used in the __________ welding.

38. Consumable electrodes are used in the __________ welding.

39. Nusselt number/Biot number varies

40. The same volume of all gases is representative of their

41. The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is

42. Silicon in steel

43. Carbon supply in pack carburising process is in the form of

44. The two elements required to form substitutional solid solution should not have

45. Solution loss reaction occurs

46. The bulk modulus of a material with Poisson’s ratio of 0.5 is equal to

47. Air-petrol ratio for maximum power generation in spark ignition engine is about

48. Spark plug is provided in a/an

49. Springs are not made of

50. Current asset of a factory includes the

51. In the blast furnace, incorporation of water vapour in the blast gives the following effect.

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

53. For separating small pieces of metal from engine oil of a car, the best separating technique is the

54. Which of the following has the highest value of refractive index?

55. A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.

56. Brittleness induced due to the presence of sulphur in steel can be reduced by adding

57. Brittleness induced due to the presence of sulphur in steel can be reduced by adding

58. The dimensional formula of bulk modulus of elasticity is same as that of the

59. Surface finish of casting does not depend upon the

60. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively

61. The elastic strain in copper is due to the

62. The ratio of the shear stress to the principal stress on a principal plane is

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

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

65. Oxide layer formed on the non-ferrous metal surface after its annealing is

66. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area ; in the casting)

67. Surface tension of a liquid

68. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.

69. Which of the following is not a suitable solid lubricant?

70. Diamond does not conduct electricity, because

71. Which one can be directly solidified from gaseous state wihtout entering into liquid state?

72. Failure of a material is attributed to __________ if it fails below its yield point.

73. Increasing sulphur content in pig iron tends to make it

74. Springback in sheet metal bending depends on the

75. Number of electrons in the outermost orbit of a semi-conductor is

76. Pick out the wrong statement about powder metallurgy technique.

77. Which of the following is not used as a bearing material?

78. Which of the following metals can not be hot worked at room temperature?

79. Improvement in mechanical properties of metals in its hot working is due to the grains

80. High __________ of cast iron makes it suitable for use in machine beds.

81. __________ test determines the yield strength, Young’s modulus of elasticity, percentage reduction in area & percentage elongation of a material.

82. Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is

83. Stainless steel is welded using

84. Pick out the wrong statement about the machinability of metals. Machinability of a metal

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

86. Temper brittleness of a material can be fairly detected by the __________ test.

87. Hardening of steel is not possible, unless it is heated __________ critical point.

88. __________ are not emitted by radioactive substances.

89. Addition of __________ to steel does not impart hardness.

90. Pick out the wrong statement about nucleate boiling.

91. Pick out the correct statement about the condensation.

92. Which of the following heat treatment processes is used for softening the hardened material?

93. Large diameter shafts are manufactured by

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

95. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

96. The difference in the properties of a substance in three states of matter depends upon the

97. __________ circuit is most commonly used to measure strain with the help of a strain gauge.

98. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

99. Wavelength of radiation emitted by a body depends on the __________ of its surface.

100. Cementite is in the lamellar form in the __________ phase of steel.

101. Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.

102. The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the

103. Which of the following is a weak acid?

104. The ‘laughing gas’ is

105. Pick out the wrong statement.

106. Out of the following, __________ pipe is the least corrosion resistant.

107. Out of the following, the most melleable material is

108. The noble metals

109. Filler material used in welding should have __________ as compared to the parent metal to be welded.

110. The leaching solvent used in Baeyer’s process for the purification of bauxite is

111. The unit of gc is

112. A thermally thin body is the one for which

113. Euler number is defined as the ratio of inertia force to __________ force.

114. Existence of velocity potential implies that the fluid is

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

116. Pick out the wrong statement.

117. Preheating before welding is done to

118. Fire in fuel gas pipelines is extinguished most effectively by

119. Boiling point of water gets lowered at high altitudes (e.g., hills), because

120. Desert air coolers being rendered ineffective in rainy season is due to

121. Auto collimator is used to check

122. About __________ ton of coke is required in a cupola to produce one ton of casting.

123. The most commonly used moderator in nuclear power plants is

124. Role of a “collector” in froth floatation is to

125. Pick out the wrong statement.

126. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.

127. A reduction in thermal resistance during heat transfer does not occur in the

128. As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

129. The following type of bonding is strongly directional in solids.

130. The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the

131. Non-ferrous alloys used for making cutting tools need not have high

132. The gases used in the treatment of asthma is a mixture of __________ and oxygen.

133. Magnetic permeability of iron is increased by its

134. The yield point in fatigue loading compared to that in static loading is less. The ratio of ultimate tensile strength to endurance limit of a material subjected to fatigue loading is

135. FeO (s) + CO (g) = Fe (s) + CO₂ (g), k = 0. 435 at 1173E; At equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K?

136. Material of construction of foundary crucible is

137. Material of construction of foundary crucible is

138. Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

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

140. Plastics as a material of construction suffer from the drawback of low

141. Which is the only metal that exists in liquid state at room temperature?

142. A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place

143. Presence of nickel & chromium in steel does not raise its

144. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

145. In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.

146. Fluorine is not a constituent of

147. Superheated vapour behaves like

148. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

149. Change in volume of metals from absolute zero temperature to their melting points is

150. The most serious manufacturing defect from fracture toughness point of view is

151. Unit of surface tension in S.I. unit is

152. Limestone is added in the blast furnace (during pig iron manufacture) to

153. The following thermocouple may be used for measuring temperature upto 1873°K.

154. Pick out the correct combination about the role of various additives used in polymers.

155. Which of the following does not discharge the dust collected as a dry solid?

156. All of the following alloying elements of steel increases hardness but sacrifice ductility, except

157. If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ?

158. Use of flux during soldering is done to

159. “Internal energy of a gas obeying Vanderwall’s equation of state, (p + a/v²)(V – b) = RT , depends upon its”

160. The quantity of electricity required to deposit one gm equivalent of any substance is one

161. Feed check valve is used in steam boilers to

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

163. Draft allowance given to patterns is for

164. Potable water means the water used for

165. 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) ?

166. The phenomenon of weld decay is found in case of

167. A floating body oscillates about its __________ when it is displaced slightly.

168. Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)

169. Expansion device used in a window air-conditioner is a/an

170. With increase in annealing temperature, the following defect density decreases.

171. Which of the following has the least oili-ness ?

172. Which of the following is a permanent fastening?

173. Which of the following is a synthetic abrasive ?

174. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

175. In __________ process, there is an increase in entropy with no degradation of energy.

176. Wrought iron does not have

177. Wrought iron does not have the

178. Wrought iron is not

179. Pick out the wrong statement.

180. Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.

181. Out of the following, the materials having maximum magnetic permeability is

182. The phenomenon occurring during explosion of a hydrogen bomb is

183. X-rays are

184. Minimum thermal efficiency of a steam boiler may be around __________ percent

185. Optical activity is a/an __________ property.

186. The most important requirement for aluminium industry is the availability of cheap

187. Shampoos are commercially not available in the form of

188. Pick out the wrong statement.

189. Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.

190. Out of the following, the highest emf for a given temperature is generated by the __________ thermocouple.

191. __________ property of a material is determined by the Herbert Pendulum device.

192. For preparation of porous bearings by powder metallurgy, preferred particle shape is

193. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the

194. Enzymes belong to the category of

195. Dryness fraction of dry steam is

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

197. Pick out the wrong statement:

198. Lap joints are preferred over butt joints in soldering/brazing, because these joints are

199. α-rays are

200. In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be

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