Mechanical Engineering Interview Questions
Questions Answers Views Company eMail

what is spherical surface contact and midsplit surface clearance regarding to turbine.

Bhel,

2 2392

what is the purpose of the nozzle of impulse turbine?

RRB, Siemens, ABC Inc,

7 5976

define stress

6 3376




define strain

7 3626

Compare the working principle of gas turbine of capacity more than 10megaW, diesel generator and wind turbine

879

Identify the common problems and solution for gas turbines, diesel generator and wind turbine during operation.

1921

difference between the construction of small and big diesel engine

1 2543

What is the difference between DIN statndard and DN standard for flanges & what does PN mean in DIN standard.

2 27258




How do we calculate number of jets for Pelton turbine, when its specifications like turbine diameter, number of buckets, total discharge are given?

JSW,

1 4099

how many type of welding

11 8703

pls tell me the process to set up a power plant right from the permission from state govt ????

804

How the steam blowing pressure of a steam Boiler is calculated ?

Hindalco,

2 4737

what is the best material for gears?

7 6944

what is materal used for piston in IC engine& why?

ONGC, NTPC,

16 11822

which case we find maximum pressure & flow in centrifugal pump - circular casing or volute casing?

1 1764


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Un-Answered Questions { Mechanical Engineering }

Question regarding property of Critical Path?

754


How to create a Button use visual basic in Excell 2007 and how to hyperlink the button ?

904


When repacking a valve the rings of packing should be oriented so that the packing ends are installed ____________.

1111


why we do not megger to motor under system is very high vaccum condition. and what is the tempreture of vaccum conditon

718


if there is 30% loss in cooling of an ic engine then to reduce that it is ok to supply 30% less fuel? why?

691






How the bearing numbers are allocated?

871


Why preferred Production than Drilling?

1327


1. What happens when too much cylinder oil is injected in the working cylinder? 2. Is the unit and normal value fuel ratio of an average diesel engine? 3. What is the formula for 1 HP of a two-cycle engine? 4. Name the indicator diagram. 5. What are the 3 parts in indicator diagram? 6. What are the causes of damage of diesel engine exhaust Valve? 7. What are the causes of I.O. high temperature in a diesel engine? 8. What trouble could result if the main engine is using a low grade of fuel? 9. What are the causes of liner high temperature? 10. What happen when too much cylinder oil is injected in the working cylinder? 11. How many lubricating holes are there in cylinder? 12. What are the defects in exhaust valve? 13. How do you control cylinder liner wear? 14. How much is the specific fuel consumption of an average diesel engine? 15. Purpose of lubricator in a large diesel engine. 16. Explain how the cylinder lubrication on main engine is done? 17. Explain the function of cooling water expansion tank. 18. Explain the causes of the exhaust valve leakage. 19. What is the purpose of I.O. circulation before and after starting of engine? 20. Names the valve connected in cylinder head of the engine. 21. Name the safety devices of diesel engine? 22. What is injection tag? 23. Explain how to measure crank web deflection? 24. In a 4 cycle engine the intake valve begins to open at? 25. What causes cylinder liner-wear down? 26. What causes diesel engine to automatically stop? 27. What causes crankcase explosion? 28. What do you call the clearing of air inside cylinder after combustion? 29. What is the circulation of I.O. pump of diesel engine? 30. What causes diesel engine trouble when using heavy oil? 31. What causes turbocharger surging? 32. What pressure is highest L.O. Gravity Head or S.W. of the stern tube circulation 33. What is fuel catalytic cracking 34. Contaminants of fuel oil 35. Crankcase oil mist detector 36. Inspection for intermediate shaft bearing. 37. What are the causes of main engine black smoke? 38. Causes of emergency trip of diesel engine 39. What are the causes if one cylinder in a diesel engine has a high temperature? 40. Explain how the lubricating oil circulates in a diesel engine. 41. What are the causes of damage to propellers? 42. What causes friction in the cylinder? 43. What causes damage to impellers? 44. In a four-stroke diesel engine, In what engine exhaust valve will open? 45. How is propeller fitted in shaft? 46. What valves are fitted in a four-stroke diesel engine? 47. What are the automatic tripping devices of diesel generator? 48. What is the purpose of thrust bearing? 49. What is fuel oil viscosity, specific gravity? 50. What are the causes of low compression in the main engine? 51. What do you measure in the banana and mountain diagram? 52. What is a brake horse power? 53. What are the requirements of a good fuel? 54. What is the purpose of a setting tank? 55. What is the purpose of a turning gear? 56. What is the purpose of starting air? 57. What is the purpose of engine preheating? 58. What is the purpose of air blow? 59. What is the purpose of stern tube? 60. Where can you find thermometers in diesel engines? 61. What would happen if there is air in fuel oil? 62. What type of pump is lubricator pump? 63. What is the purpose of piston rings? 64. The advantage of a controllable pitch propeller? 65. Explain the fresh water cooling system. 66. What are the typical indicator diagrams? 67. What is the trunk type and crosshead type piston 68. What is higher IMP or BHR 69. What is the sensitive part of the liner 70. Discuss how to prepare the M/E in the standby condition 71. Explain how to clean LO 72. Explain the principle of Suizer Fuel oil injection pump 73. What is the volume develop by the piston from BDC to TDC 74. Enumerate some trouble of fuel injection valve 75. Causes of M/E high exhaust valve temperature 76. What is the purpose of scrapper ring 77. What are the items to inspect after cylinder liner is pulled out 78. What resistance the ship encounter when the vessel is at sea 79. What will you do in case of scavenging fire 80. Draw the flow of F.O. diagram from service tank to Main Engine? 81. What are the types of cleaning main engine Turbo Charger blower side? 82. What are the causes of main engine Turbo Charger blower side dirty? 83. Sketch the jacket cooling system? 84. What will cause if you run your engine in critical RPM continuously? 85. What are the properties of fuel oil? 86. What will you check if one cylinder of your engine is not like the others? 87. What do you do when in your duty, ME alarm oil mist detect high density? 88. Classification of bunkers? 89. What is the purpose of increasing the pressure on the F.O. system of the engine? 90. What are the advantages of white metal? 91. What is the use of white metal? 92. What is the cause of cylindrical liner overheating? 93. What are you going to inspect or check when you open the crankcase? 94. Draw L.O. system in diesel engine? 95. What is the specific gravity of F.O. and D.O? 96. What is pour point? 97. What is flashpoint? 98. What materials are used for engine propeller? 99. How fuel oil consumed by medium engine? 100. What is the remedy if due exchanging, valve broke out during engine running operation? 101. At 50 Centigrade (Fuel oil) what is its cast? 102. At 50 Centigrade (Diesel oil) what is its cast? 103. What do you call a piston travel from TDC to BDC? 104. What happened if the exhaust valve is leaking? 105. Why and what cause of leak fuel oil in high pressure pipe of main engine? 106. What device installed in the F.O. system when excess oil return to drain tank? 107. What parameters to be reported when we send lubricating oil for shore analysis? 108. Heavy fuel oil sulfur content and counter measures? 109. What will happen when engine stays in critical speed of 58-65 RPM? 110. What are the causes of L.O. high temperature? 111. How do you detect starting valve leaks? 112. What are the causes of dirty lubricating oil? 113. Identify the parts of indicator diagram? 114. What are the symptoms of broke piston ring? 115. How much pressure on air reservoir? 116. Name the parts of piston through connecting rod? 117. What are the causes of positive and negative propeller slip? 118. What will be the cause of scavenging fire? 119. What will you do when scavenge fire happened? 120. What do you going to observe, when a diesel engine is running? 121. Where is the expansion tank located? 122. How the F.W.C. system of diesel engine circulate? 123. What is mean effective press? 124. Draw a crankshaft and show the parts? 125. What is the lower part of connecting rod? 126. What should you do before you start the engine? 127. When you will install a new piston ring, what will be the position of it? 128. What is max pressure? 129. What are the things to do when approaching the port? 130. What will be the cause of the loose compression in a cylinder? 131. What is the maximum P-max for a cylinder in M/E. 132. What is the indication of leaking starting valve of an engine? 133. What is the thermal efficiency of a diesel engine? 134. What will be the cause of high temperature in one cylinder of D/E?

3353


how to calculate cooling water require to condense x amount of vapor in a condenser.

687


what is routh,s law in thermal engineering ?

1010


My rotary kiln die 2mtrs x 36 mtrs long bauxite calcination .PL suggest ld fan cap.and pressure.

391


i have want jindalsteel tecnical wrritten test paper.

1138


what are the groups of instruments?

915


plz sent me jindal placement papers in mechanical enginnering

1591


how to calculate transformer conservator size

889