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Mech

Mech

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#1. What we call the resistance of a material against any external force.

#2. Which hardness test uses the steel ball as indenter?

#3. In which test, the specimen will be used in the form of the supported beam?

#4. Which metal from the following has the non-crystalline structure?

#5. Which of the following has less crystallinity?

#6. Which of the following axis system is being satisfied by tetragonal crystal system?

#7. Which one of the following is least symmetrical?

#8. ASTM stands for?

#9. What is the scale range of the Mohs hardness test?

#10. What is the first step involved in the process of preparing test samples for microstructural examination?

#11. Etching of specimen is done to achieve _______

#12. Which equipment can be used for the inspection of the inside portion of the hollow chamber or narrow tube?

#13. Which of the following property is the fine-grained structure?

#14. Which penetrating liquid is used for the liquid penetration test?

#15. Which of the following non-destructive testing is used to detect the change in the composition of any material?

#16. What is the melting point of iron (in ℃)?

#17. What is the Iron-Carbon phase diagram?

#18. Which of the following reaction does not exhibit a mushy zone in the Fe-C phase diagram?

#19. Which of the following material has the carbon varying from 2.1 to 4.3%?

#20. Which of the following material has the carbon varying from 4.3 to 6.67%?

#21. Which equation represents the Gibbs phase rule?

#22. The invariant reaction involving a liquid phase decomposing into two different solids on cooling is known as _____

#23. The Line joining a liquid phase with liquid and solid phase mixture is known as ________

#24. The line joining a solid phase with liquid and solid phase mixture is known as ________

#25. Cast iron is a product of _______

#26. Wrought iron is a product of ______

#27. Which of the following induces fine-grain distribution in alloy steel?

#28. Tensile strength of alloy steel can be improved by adding ______

#29. Which of the following is the hardest constituent of steel?

#30. Iron possesses BCC crystal structure up to (in degree centigrade)?

#31. Which of the following form of iron is magnetic?

#32. Which of the following methods is best for examining surface flaws on the castings?

#33. Which of the following types of light is preferred for using fluorescent penetrant in liquid penetrant testing (LPT) method?

#34. Which of the following processes is preferred for preparing aluminum ingots for the liquid penetrant testing method?

#35. Which of the following inspections is used for detecting invisible surface defects in a nonmagnetic casting?

#36. Which of the following methods is best for detecting interior flaws in the castings?

#37. Which of the following was not a classification of a subject taking the MFFT?

#38. Which of the following parameter is used to assess the magnetic ability of a material?

#39. With an increase in temperature, the resistance of a semiconductor _________

#40. What is the polymerization of two or more chemically different monomers forming a long molecular chain?

#41. Which of the following is a secondary bond network of thermoplastics?

#42. Which of the following are ceramics solids?

#43. For an M10 grade RCC (Reinforced Cement Concrete), the cement ratio to aggregate to the sand is?

#44. Which one of the following can act as a modifier in the glass-forming process?

#45. Which of the following is not a laminar composite?

#46. In sandwich composites, which of the following material can be used for filling purposes?

#47. Which of the following has a greater impact on the longitudinal strength of reinforced composites?

#48. Angle between side cutting edge and end cutting edge in the top surface plane of the tool.

#49. What is the maximum allowed value of VB in mm for the HSS tool used with the cast iron workpiece for rough machining?

#50. Which of the following tools is most suitable for very hard and brittle material?

#51. In bending of a beam, transverse shearing stresses are induced between the elements or fibres, if the bending moment is

#52. A hot short metal is

#53. Guest’s theory of failure is applicable for following type of materials

#54. Rankine’s theory of failure is applicable for following type of materials

#55. Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

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

#57. In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

#58. If the longitudinal strain in a material is doubled in comparison to lateral strain, then ratio of modulus of rigidity to elasticity will be

#59. If a load W is applied instantaneously on a bar; then the stress induced in bar will

#60. Brittle coating technique is used for

#61. Stress concentration is caused due to

#62. The endurance limit of a material with finished surface in comparison to rough surface is

#63. Plastic flow in ductile materials

#64. Stress concentration in static loading is more serious in

#65. Stress concentration in cyclic loading is more serious in

#66. Pick up wrong statement. Fatigue strength can be increased by

#67. Which of the following is not correct procedure to increase the fatigue limit

#68. Coaxing is the procedure of increasing

#69. Which is correct statement about Stress concentration in static loading is

#70. In Vicker’s hardness testing, the pyramid indentor apex is

#71. In testing a material for endurance strength, it is subjected to

#72. If a material fails below its yield point, failure would be due to

#73. Cold working

#74. The building up of worn and undersized parts, subjected to repeated loads by electroplating is

#75. In nitrided parts, the origins of the fatigue cracks will occur at

#76. Which process will increase the fatigue duration of parts?

#77. Which is correct statement?

#78. Resistance to fatigue of a material is measured by

#79. In most machine members, the damping capacity of the material should be

#80. For steel, the ultimate strength in shear as compared to ultimate strength in tension is

#81. The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of

#82. At low temperatures (say 75°C) the notched-bar impact value of steel

#83. A bolt

#84. The crest diameter of a screw thread is same as

#85. Maximum principal stress theory is applicable for

#86. The following type of nut is used with allen bolt

#87. A stud

#88. Shear stress theory is applicable for

#89. A tap bolt

#90. For applications involving high stresses in one direction only the following type of thread would be best suited

#91. The included angle in unified of American National threads is

#92. The included angle in Acme threads is

#93. The function of a washer is to

#94. Cap screws are

#95. An allen bolt is

#96. The deflection of a cantilever beam under load W is δ. If its width is halved, then the deflection under load W will be

#97. Ball bearing type screws are found in following application

#98. Set screws are

#99. A self locking screw has

#100. The designation M 33 x 2 of a bolt means

#101. Rivets are generally specified by

#102. The edges of a boiler plate are bevelled to an angle of

#103. Which of the following is a permanent fastening ?

#104. In order to avoid tearing of the plate at edge, the distance from the centre line of the rivet hole to the nearest edge of the plate in terms of dia of rivet d should be equal to

#105. If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

#106. Transverse fillet welded joints are designed for

#107. Jam nut is a locking device in which

#108. The pitch of threads on a lock nut in comparison to pitch of nut is

#109. Buttress threads are usually found on

#110. In order to obtain bolt of uniform strength

#111. A key capable of tilting in a recess milled out in a shaft is known as

#112. A key made from a cylindrical disc having segmental cross-section, is known as

#113. A tapered key which fits in a key-way in the hub and is flat on the shaft, is known as

#114. Fibrous fracture occurs in

#115. Turn buckle has

#116. Eye bolts are used for

#117. Fluid is a substance that

#118. Fluid is a substance which offers no resistance to change of

#119. Practical fluids

#120. In a static fluid

#121. In a single casing, multi-stage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by

#122. When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be

#123. Multistage centrifugal pumps are used to obtain

#124. In a centrifugal pump casing, the flow of water leaving the

#125. One horsepower is equal to

#126. When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

#127. Axial flow pump is started with its delivery valve

#128. Centrifugal pump is started with its Delivery valve

#129. A centrifugal pump has speed 1000 r.p.m., flow 1200 l.p.m., head 20m, power 5 H.P., if speed is increased to 1500 r.p.m. then new H.P. will be

#130. A centrifugal pump has speed 1000 r.p.m., flow 1200 l.p.m., head 20m, power 5 H.P., if speed is increased to 1500 r.p.m. then new flow will be

#131. The efficiency of a centrifugal pump is maximum when its blades are

#132. The power required to drive a centrifugal pump is proportional to

#133. For starting an axial flow pump, its delivery valve should be

#134. If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge, The horse power required will be

#135. Head developed by a centrifugal pump depends on

#136. Low specific speed of a pump implies it is

#137. Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

#138. Pick up the wrong statement about overall efficiency of a centrifugal pump. It is proportional to

#139. The specific speed of a pump is defined as the speed of a unit

#140. Delivery head of a centrifugal pump is proportional to

#141. Discharge of a centrifugal pump is proportional to

#142. The percentage slip for a reciprocating pump is defmed as the percentage of

#143. If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge

#144. Power required to drive a centrifugal pump is proportional to

#145. The optimum value of vane exit angle for a centrifugal pump impeller is

#146. In a centrifugal pump, the liquid enters the pump

#147. For small discharge at high pressure, following pump is preferred

#148. In centrifugal pumps, maximum efficiency is obtained when the blades are

#149. Motion of a liquid in a volute casing of a centrifugal pump is an example of

#150. For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

#151. The metallic structure of mild steel is

#152. The crystal of alpha iron is

#153. A reversible change in the atomic structure of steel with corresponding change in the properties is known as

#154. Isotropic materials are those which have the same

#155. Paramagnetic alpha iron changes to gamma iron at

#156. The elastic stress strain behaviour of rubber is

#157. Super conduction by metals is observed in the temperature range of

#158. Which of the following constituents of steels is softest and least strong

#159. Ferromagnetic alpha iron exists in temperature range of

#160. The number of electrons in 1 cm3 of metal would be of the order of

#161. The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to -150°C will

#162. Slow plastic deformation of metals under a constant stress is known as

#163. The ultimate tensile strength of low carbon steel by working at a high strain rate will

#164. Mild steel belongs to the following category

#165. The ability of a material to resist softening at high temperature is known as

#166. In compression, a prism of brittle material will break

#167. Malleability of a material can be defined as

#168. For the allotropic forms of iron, the points of arrest are

#169. Ductility of a material can be defined as

#170. The percentage of carbon in pig iron varies from

#171. The percentage of carbon in grey iron cast’ ings usually varies between

#172. Pig iron is the name given to

#173. The unique property of cast iron is, its high

#174. Cast iron is characterized by minimum of following %age of carbon

#175. In grey cast iron, carbon is present in the form of

#176. In nodular iron, graphite is in the form of

#177. In malleable iron, carbon is present in the form of

#178. Wrought iron is

#179. Sulphur in pig iron tends to make it

#180. Pick up wrong statement about wrought iron

#181. Iron is

#182. A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as

#183. Chilled cast iron has

#184. Cast iron has

#185. White cast iron contains carbon in the form of

#186. In mottled cast iron, carbon is available in

#187. An important property of high silicon (12 – 18%) cast iron is the high

#188. An important property of malleable cast iron in comparison to grey cast iron is the high

#189. Steel contains

#190. Carbon steel is

#191. Annealing of white cast iron results in production of

#192. “Killed steels” are those steels

#193. Hardness of steel depends on

#194. Maximum percentage of carbon in ferrite is

#195. Maximum percentage of carbon in austenite is

#196. Corrosion resistance of steel is increased by addition of

#197. In which of the following cases, consideration of creep is important

#198. The most effective inhibitor of grain growth, when added in small quantities is

#199. Depth of hardness of steel is increased by addition of

#200. Railway rails are normally made of

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