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questions of rotary equipments

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  • #3752

    Anonymous

    questions of rotary equipments

    From: hsh_350@yahoo.co.in
    Date: 15.3.08
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    please send answers to the following e-mail:-hsh_350@yahoo.co.in
     PUMPS 1. Name parts of centrifugal pumps? 2. Explain overhauling stops for a back pull our pump? 3. What is impeller back clearance? 4. How do you check impeller back clearance? 5. How do you adjust impeller back clearance? 6. What is impeller front clearance? 7. How do you check impeller front clearance? 8. How do you adjust impeller front clearance? 9. What is fixed bearing? 10. Where is fixed bearing located? 11. What is floating bearing? 12. Where is floating bearing located? 13. What is the necessity of floating bearing? 14. What is bearing back to back arrangement? 15. Why bearing back to back arrangement is provided? 16. In which series bearing back to back arrangement is available? 17. How do you check plain journal bearing clearance? 18. Is there any thumb rule for journal bearing clearance? 19. Have you seen tilting pad journal bearings? 20. What are the various ways to check titling pad journal bearing clearance? 21. What is the advantage of tilting pad journal bearing over plain journal bearing? 22. How do you adjust tilting pad journal bearing clearance? 23. Give the “go” ”no go” gauge dimensions for a 100 mm journal diameter with a minimum bearing clearance of 0.16mm and maximum bearing clearance of 0.25mm? 24. Why plastic gauge are preferred rather than lead wire? 25. How do you polish journal bearings? 26. What is spherical seated journal bearing? 27. Why spherical seated bearings are used? 28. What is bearing crush? 29. How do you check bearing crush? 30. How do you adjust bearing crush? 31. How do you check thrust bearing clearance? 32. How do you adjust thrust bearing clearance? 33. How do you identify bearing pads based on their Pivot? 34. How do you identify RH & LH pivoted pads? 35. If the DOR of a rotor is CW looking from C/E, where will you locate RH & LH pads? 36. What is adapter sleeve & withdrawal sleeve? 37. How do you specify bearing lock nut & lock washer? 38. What is rotor free float? 39. Explain rotor centering? 40. How do you adjust rotor centering without affecting axial float? 41. What is radial centering? 42. How do you adjust radial centering? 43. Explain the overhauling sequence for a multistage centrifugal pump? 44. What do you mean by wear ring? 45. What is the purpose of wear ring? 46. What are the different types of wearing? 47. How do you check wear ring clearance? 48. How do you adjust wear ring clearance? 49. How do you fix eye wear ring & casing wear ring? 50. What are the different types of shaft sleeves? 51. Where are the throttle sleeve & throat sleeve located in a rotor? 52. Draw a balanced opposed rotor arrangement? 53. Why balanced opposed rotor arrangement is preferred? 54. Where is the balance drum located in rotor? 55. What is the purpose of balance drum? 56. What is the applicable API standard for centrifugal pumps? 57. What do you mean by oil wedge? 58. What do you mean by oil whirl or oil whip? 59. What is hydrostatic lubrication? 60. What is hydronamic lubrication? 61. What is force feed lubrication? 62. What is oil thrower ring? 63. What is the purpose of oil thrower ring? 64. What is oil scoop? 65. What is the purpose oil scoop? 66. What is oil control ring? 67. What is the purpose of oil control ring? 68. Why auxillary lube oil pump is used? 69. What is the casing bolt tightening sequence? 70. What is torque wrench? 71. What is rotor run out? 72. How do you check rotor run out? 73. What are the various ways of impeller fixing arrangement? 74. What is the general value of rotor run out at various locations? 75. What is NPSH? 76. What is NPSH required & NPSH available? 77. What is cavitation? 78. What is inducer? 79. Why inducer is used? 80. What is the difference between discharge head & discharge pressure? 81. What is the minimum Flow Check Valve? 82. Why minimum Flow Check Valve is used? 83. What is vertical in line pump? 84. How do you center the rotor and position the coupling of a vertical in line pump? 85. Explain the procedure for mechanical seal renewal of a vertical in line pump? 86. What is vertical sump pump? 87. What is steady bearing? 88. Draw the performance characteristics curve for a centrifugal pump? 89. What do you mean by balancing line in multistage centrifugal pump? 90. What is the purpose of balancing line? 91. Why mechanical seals are used? 92. How do you specify a mechanical seal? 93. Name few seal manufacturer? 94. What is 15WRS seal? 95. What is the applicable standard for mechanical seal? 96. What is the average life expected out of a seal as per API 682? 97. Name few types of mechanical seal? 98. Draw simple mechanical seal and name its part? 99. Explain the complete dismantling & assembly procedure for a mechanical seal? 100. What is seal setting compression? 101. What is cartridge type of mechanical seal? 102. Can you change the seal setting compression of cartridge type mechanical seal? 103. Explain the assembly procedure of a cartridge type mechanical seal? 104. How do you identify a balanced/unbalanced mechanical seal? 105. What is pusher/non pusher type mechanical seal? 106. What are all the pre checks to be made on a pump before starting positioning a mechanical seal? 107. What is stuffing box squareness? 108. How do you check stuffing box squareness? 109. What type of mechanical seal is preferred for hot oils? Why? 110. What type of mechanical seal is preferred for Sulphur duty? 111. What is seal flushing fluid? What is its purpose? Name few seal flush plans? 112. What is seal quenching fluid? What is its purpose? Name few seal plans? 113. What is stuffing box cooling water jacket? Why it is used? 114. Why seal coolers are used? 115. Name few MOC of seal faces? 116. What is seal ring and mating ring? 117. How many elastomers are used in a mechanical seal assembly? 118. Name few snap ring in a mechanical seal? 119. What is snap ring in a mechanical seal? 120. What are the usual problems faced with mechanical seals? 121. Does the rotor axial float have something to do with mechanical seal? 122. What is double mechanical seal? Why it is used? 123. Name the two types of double mechanical seal? Where is it used? 124. What do you mean by barrier fluid? Name few barrier fluid? 125. What do you mean by buffer fluid? Name few buffer fluid? 126. What is the difference between barrier fluid and buffer fluid? 127. Where do we use cyclone separator in mechanical seal? 128. What is pumping ring in a mechanical seal? What is its purpose? 129. What is the difference between inside mounted seal & outside mounted seal? 130. What is seal balance ratio? 131. What is the seal balance ratio for balanced/unbalanced seal? 132. Difference centrifugal pump and reciprocating pump? 133. How do you measure valve lift in reciprocating pump? 134. What is the necessity of pulsation dampener? 135. Name few types of pulsation dampener? 136. How do you fill up gas in a accumulator? 137. Explain overhauling sequence for reciprocating pump? 138. What is web deflection? How do you measure web deflection? 139. How to check big end bearing & small end bush clearance? 140. What do you mean by stroke length? 141. What is gudgeon pin? 142. What is cross head slide/shoe? 143. Name few ways of locking arrangement of piston/plunger? 144. How to ensure in-line concentricity of crankshaft to cylinder bore? 145. What are dosing pump? 146. Name few types of dosing pump? 147. Why dosing pumps are used? 148. What are the probable reasons for cylinder knocking in a reciprocating pump? 149. What are the probable reasons for valve knocking in reciprocating pump? 150. What are the probable reasons for vibration in a reciprocating pump? 151. Where do we use screw pumps & gear pumps? 152. What do you mean by flute? 153. What is idler screw? 154. How drive is transmitted to idler screw? 155. How do you measure radial clearance & axial clearance between flutes? 156. How do you measure gear backlash? 157. What is the usual gear hardness value? COMPRESSOR 158. Name few parts of a centrifugal compressor? 159. What is the applicable standard for centrifugal compressor? 160. How do you specify a centrifugal/horizontally split compressor?
    161. Explain the over hauling steps for a Barrel type centrifugal compressor? 162. How do you center a compressor rotor? 163. How do you check labyrinth clearance for a Barrel type centrifugal compressor? 164. What is the compound used in the split half of the casing? 165. How do you leak check a barrel type compressor? 166. Explain the overhauling steps for a horizontally split type centrifugal compressor? 167. Name the different types of labyrinth? 168. How do you measure labyrinth clearance in barrel type compressor? 169. How do you measure labyrinth clearance in horizontally split type compressor? 170. What is diaphragm? 171. What is diaphragm delta P and what is the maximum value allowed? 172. What is balance piston? 173. What is balance piston delta P & what is its normal value? 174. What is bridge over arrangement? 175. Draw the lub. Oil circuit? 176. What is the lub. Oil run down tank? 177. What is the normal filtration size of LO &SO filter? 178. Draw the seal oil circuit? 179. What is the purpose of PCV in the seal oil circuit? 180. What is the purpose of LCV in the seal oil circuit? 181. What will happen if PVC opens more? 182. What is flow through valve in sweet oil system? 183. Why buffer gas is used in the seal oil circuit? 184. Is there any other source for isolating the seal oil from process gas? 185. What is dry gas seal? 186. Draw the performance characteristic curve? 187. What is polytropic head & polytropic efficiency? 188. What is surging? 189. What is stonewall effect? 190. What is stalling? 191. Draw a simple seal? 192. What is contact type and non contact type seal? 193. Is the seal ring stationary, rotating or floating? 194. How do you measure seal ring clearance? 195. Does the seal ring have clearance with housing? Why? 196. What is the general value of seal ring clearance? 197. What is dummy bearing? 198. What is honey comb labyrinth? 199. What is head? 200. What is head puller? 201. What is belly band? 202. Differentiate bundle O-ring & head O-ring? 203. What is hydraulic fit coupling? 204. Draw a simple sketch to assemble & withdraw hydraulic fit coupling? 205. What is pusher pump & expander pump? 206. Is hydraulic fit coupling with o-rings or without o-rings? 207. How do you ensure fit of taper coupling? 208. What is diaphragm coupling? 209. What is active shim & store shim? 210. What is shear plate coupling? 211. Name different type of couplings? 212. What is the allowable vibration level as per API standard? 213. Name few parts of reciprocating compressors? 214. What is the applicable standards for reciprocating compressors? 215. Explain the overhauling steps for a reciprocating compressor? 216. What is a top dead centre? How do you measure it? 217. Is there any means to increase TDC? How to do it? 218. What is bottom dead centre? How do you measure it? 219. Why TDC is more than BDC? 220. What is rod deflection? 221. What are the various clearances measured during overhauling of reciprocating compressor? 222. What is cylinder to piston clearance? How do you measure it? 223. How do you check piston ring end clearance? 224. What is the difference between piston ring & bearer ring? 225. What is the MOC of piston ring & bearer ring? 226. How much is the normal clearance between piston ring and piston groove? 227. Name different types of gas packing rings? 228. What is the pressure breaking rings? Where it is located? Which one is pressure breaking ring? 229. What is sealing ring? Where is it located? Which one is sealing ring? 230. Draw a tangential cut ring and mark the clearances? 231. Draw a radial cut ring and mark the clearance? 232. Is there any clearances between cup to packing? Why that clearance is given? 233. What is the MOC of gas packing rings? 234. What are the various methods of capacity control? 235. What is clearance pocket? 236. What is suction valve loader? 237. Draw a simple suction valve and name its parts? 238. Draw a simple discharge valve and name its parts? 239. How do you recondition the valves of a reciprocating compressor? 240. How do you leak check a valve of a reciprocating compressor? 241. IInd stage discharge pressure is high? What is the problem? How will you identify? 242. There is a capacity reduction in the discharge pressure of the compressor? What is the problem? 243. There is a reduction in the discharge pressure of the compressor? What is the problem? 244. What is the normal pressure ratio of a discharge suction? 245. Why intercoolers are used? 246. What is distance piece? 247. What is oil wiper packing? 248. Why intermediate gas packing are used? 249. What is cylinder jacket? 250. What is stuffing box jacket? 251. How the CW is prevented from entering the gas side? 252. What is volumetric efficiency? 253. What is the need of cylinder liner? What is its MOC? 254. Explain the procedure for liner renewal? 255. What is cylinder liner lubrication? 256. How do you lubricate the cylinder liner? 257. What is single acting, double acting and balanced opposed? TURBINES 258. Name few parts of steam turbine? 259. What is the applicable API standard for steam turbine? 260. Explain the over hauling steps for steam turbine? 261. What is the regulating valve or governing valve or chest valve? 262. What is TTV or MSV? 263. What is nozzle box? 264. What is nozzle? 265. What is fixed blade and moving blade? 266. Where to measure moving blade to fixed blade clearance? 267. What are the various clearance measured in a rotor? 268. How do you assemble carbon packings? What is anti rotation pin? 269. How do you centre a turbine rotor? 270. What are the different types of labyrinths in a turbine rotor? 271. How do you check bumping clearance? 272. What is internal casing? 273. What is internal clearance? Why it is necessary? Explain the procedure? 274. Explain the procedure of carrying out optical alignment? What is its advantage? 275. What is a governor? Name few types 276. What is minimum and maximum governor & how did you overcome? 277. What is woodward PGPL & SGX governors? 278. Explain problem faced by you in a governor & how did you overcome? 279. What is isochronous governor? 280. What is speed droop governor? 281. A governor is hunting? What are the on line & off line adjustment that can be tried? 282. What are the various trip systems available in a turbine? 283. How do you check OST in a turbine? How do you adjust OST? 284. Why LLO trip is given for a turbine? 285. What is the extraction cum condensing turbine? 286. What is the control mechanism for extraction cum condensing turbine? 287. What are the various parameters to be noted down for the above hydraulic circuits? 288. What is a gland ejector? What is ejector condenser? 289. What is hogging ejector? What is startup ejector? 290. What are the auxillaries for a steam turbine? 291. What is a thrust collar? 292. How is tachometer drive taken from the rotor? 293. What is pedestal trip? 294. What is a pressure compound & velocity compounded turbine? 295. What is impulse and reaction turbine? 296. What is static electricity? 297. What is electrical run out? 298. What is gauss meter? 299. How do you demagnetize a rotor? 300. What is earth brush? 301. What is the compound used in the split half of the casing? 302. What is the principle of bolt heater? 303. What is centrifuge? Why it is used? 304. What is the filtration size of normal Lo filter? FINFAN 305. What is finfan? 306. What are the various measurements to be taken on a finfan? 307. How do you measure blade angle? What is the instrument used? How do you adjust? 308. How do you measure tiptrack? 309. What is FRP blade? What is its advantage? 310. What are the various methods of fixing blade to hub? 311. What are the various methods of drive arrangement available for finfans? 312. What are the PM jobs carried out on a finfan? CONVEYORS 313. What is the use of conveyor in a refinery? 314. How do you specify a belt? 315. What are the various types of rollers used on a conveyor? 316. What are the troughing roller, return roller, self aligning roller? 317. Why counter weights are used? 318. What are the various methods of take up
    pulleys? 319. What are the various types of belt joint splicing? 320. Explain the vulcanizing & hot vulcanizing? 321. What are the PM jobs carried out on a conveyor? 322. What is the compound used for vulcanizing? 323. What is the cold vulcanizing & hot vulcanising? 324. How do you adjust sway in a conveyor? 325. What is the difference between nylon belt & cotton belt? 326. What are the various belt widths available? 327. what is the pull chord switch? 328. What is the purpose of snub pulley? 329. In a belt which should be the leading joint? Why? 330. How do you put a belt patch up? LOADING ARMS 331. What is loading arm? 332. Why loading arms are used? 333. What is the method of clamping adopted to fix the loading arm to ship manifold? 334. What is the safety feature involved in disconnecting the loading arm during emergency? 335. How is the movement of loading arm controlled?

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  • #5521

    Anonymous

    Where did you get these questions? You got any question bank? I think you have that booklet . . . . . !

  • #4998

    Anonymous

    Hi
    Do you know the  orgin of these qustions?Thats me        jinuppp4u@yahoo.co.in  
    I got these qustions from an recruitment agency.They gave me these qustions to prepare for an upcoming intervew in 2006 I believe.I transformed that to electronic copy and posted on web.The funny thing is everybody only needs the answers……………..Ha ha ha ha ………

  • #4996

    Claus Graf
    Participant

    This document should help answer some of the questions.
     
    http://www.peerlessxnet.com/documents/B-0077.pdf
     
    Regards
     
    CG

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