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You Are On Multi Choice Question Bank SET 302

15101. Silicon percentage in the silicon steel used for electrical appliances/equipments is





15102. Material of construction of foundary crucible is





15103. Titanium can be easily welded using __________ welding.





15104. Feed check valve is used in steam boilers to





15105. Three elastic constants for a completely anisotropic elastic material which follows the Hooke's law are young's modulus, elastic limit stress and yield stress. Which of the following properties is most sensitive to increase in strain rate ?





15106. Swaging is a/an __________ operation.





15107. Pig iron is





15108. Classification of metal forming processes into hot and cold working is based on the following parameters.





15109. Kinematic viscosity of water as compared to that of air is





15110. Which of the following is the most suitable for removing fine particles (< 1 micron diameter) from air below its dew point ?





15111. Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?





15112. Puddling process is used for converting pig iron into





15113. Addition of __________ in steel can help in increasing the depth of hardness.





15114. On-off control





15115. The tensile load-elongation curve of a metal does not describe





15116. Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.





15117. Permanent set in a material is produced by subjecting it to





15118. The following is a typical anionic collector used in flotation.





15119. A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.





15120. Acetic acid is the chemical name of





15121. The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.





15122. Which of the following is not categorised as the ore agglomeration process ?





15123. With increase in temperature, the surface tension of water





15124. A reduction in thermal resistance during heat transfer does not occur in the





15125. Unit of viscosity in CGS system is





15126. Shaft/rotor speed is most accurately measured by a





15127. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.





15128. The rolling process can not be used to produce





15129. Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is





15130. Presence of nickel & chromium in steel does not raise its





15131. Hot extrusion process is not used for making





15132. Addition of __________ to steel does not help in improving its machinability.





15133. Quartz is a __________ material.





15134. The units of the rate constant for a second order reaction are





15135. The most serious manufacturing defect from fracture toughness point of view is





15136. Leakage in a cooking gas cylinder is detected by





15137. Which of the following is the most wear resistant grade of carbide used for the cutting tools?





15138. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?





15139. Laser is a device to produce





15140. Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.





15141. Minimum thermal efficiency of a steam boiler may be around __________ percent





15142. The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.





15143. Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails





15144. The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?





15145. Particle nature of cathode rays is proved due to the fact that they





15146. The most commonly used moderator in nuclear power plants is





15147. Babbit lining is used on brass/bronze bearings to increase the





15148. The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong





15149. Joining of thin foils is preferred to be done by





15150. Which of the following metals reacts violently with water ?





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