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  Question  Asked @ Answers Views     select
How can the direction of a three phase induction motor be reserved  4  2303
y we do not differ b/w atomic mass and atomic wieght? from  0  247
what sort of general awareness questions are asked in o.n.g.c entrance exam?????????????????  0  2429
Why only negative 24 vdc supply give in vibration measuring system.  5  4157
why 1 to 5 vdc is used for output measurment  4  2413
how to send request to the direct server rather than proxy server  0  205
if you short the any 2phase(R,Y,B),why fuse get blown?  5  1472
how do you calculate the length of "L" of main & distribution bar for reinforcing of raft footing  0  295
The Entropy of the source is maximum when the symbols are...................? BSNL  0  209
how do you calculate the length of "L" of main & distribution bar for reinforcing of raft footing.  4  2720
what is the spacing required for chairs for reinforcing in raft footing.  4  4408
dear sir/madam, I had applied for the post of officer trainee so plz if u have any papers both technical or aptitude plz inform me on HPCL  0  268
Hi, This is Naveen, plz if anybody have experience of IOCL interview, send me question.  0  469
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Un-Answered Questions
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if building "b" height casts a shadow "f ' feet long . the same day a tree "t" feet height will cast a shadow how many feet long ? a)ft/b b)fb/t c)b/ft d)tb/f e)t/fb 238  
what is the soft starter principle? how is connection diagram? what is the procedure for checking the connection? 271 Siemens
what is the use of vacuum balancing valve in CEP 161 NTPC
what is the purpose of bypass mode in energy lighting transformer? 132  
1. Give five parts inside the centrifugal pump and explain each? 2. What type of gear is the first reduction gear pinion? 3. List the main parts of Centrifugal pump 4. Enumerate the cause of pumps low delivery of water 5. What type of pump is main L.O. pump? 6. How to shut down and overhaul the centrifugal pumps? 7. What is the specific gravity or relative density of fuel oil? 8. Properties of F.O. the cause damage on auxiliary boiler. 9. Device use to control flow rate of centrifugal pump. 10. What is the use of gravity disc? 11. What causes damage to impellers? 12. Give the procedures in starting centrifugal pumps. 13. How to stop a purifier? 14. What type of pump is are commonly used in auxiliary boilers? 15. Explain the operation of a centrifugal purifier. 16. How would you increase the volume efficiency of centrifugal pump? 17. What is fuel oil viscosity, specific gravity? 18. What type of pump is lubricator pump? 19. Identify or enumerate the parts of stern tube 20. Explain how to adjust pump pressure 21. What is absolute pressure 22. Purpose of stern tube sealing 23. What is white metal 24. What is compound gage 25. What are safety considerations in welding job? 26. Explain the procedure in staring a F.O. purifier 27. What is a manometer and give an example of its application 28. What is acceleration 29. Enumerate or identify the parts of purifier bowl assembly 30. What are the types of pump can be found in the engine room 31. What is an oil mist detector 32. What type of metal is used in a propeller 33. What is the purpose of safety valve 34. What is the purpose of gravity tank in the stern tube 35. Explain the opening and closing of water to the bowl of the purifier 36. Which has the greater pressure in a stern tube sealing seawater or L.O. 37. What is the purpose of turning gear 38. Locate nozzle in a turbocharger 39. What is the function of mouth ring 40. What is flash point 41. How do you check steering gear 42. What is pitch 43. What is the cause of pressure drop in a centrifugal 44. Identify the parts of propeller 45. Explain adiabatic expansion 46. What is entropy 47. What is the common source of leak in stern tube 48. What is the purpose of bilge separator 49. Reason why we should avoid low speed running generator? 50. What will you check if one cylinder of your engine is not like the others? 51. What is the purpose of gravity disc in centrifugal purifier? 52. Causes of F.O. Purifier abnormal flow? 53. What type of pump use in boiler F.O. system? 54. Give the function of evaporator? 55. What are the causes of L.O. high temperature? 56. How to detect staring valve leaks? 57. What are the causes of dirty lubricating oil? 58. What are the purposes of spiral gear in a purifier? 59. How much pressure on air reservoir? 60. What is non-destructive test and what is the purpose of it? 61. Where can you find the feed check valve and feed stop valve and give the purpose of it? 62. What are the causes of trouble in a boiler during operations? 63. What are the causes of positive and negative propeller slip? 64. What is the pressure of fuel oil on main engine and diesel generator? 65. Preparation before arriving port? 66. Where is the expansion tank located? 67. How the F.W.C. system of diesel engine circulate? 68. What are the procedures on how to anneal? 69. How many percent (%) of carbon content in Cast Iron? 70. What will happen if the centrifugal pump has no pressure? 71. What are the things to do when approaching the port? 72. Give the safety precaution when working in a high place. 73. Checking points in steering gear system? 74. What are the procedures in paralleling D/G? 75. What is the indication of leaking starting valve of an engine? 76. What will be the cause of high temperature in one cylinder of D/E? 77. What is the purpose of air cooler of D/E? 601  
An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor frequency at maximum torque point is A 3.33% B 4.44% C 5.55% D 6.66% 69  
What are the different losses In a de mac1une'! t.xplam 224  
how can we design dia of rainwater pipes ? plez explain by using formula ? 151  
A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03 165  
hi friends how 3 phase converter functioning ?what is working principle of rotory phase converter ? 183  
What is the meaning of floating point earthing in battery backed systems ? 200  
temp of cast resin 1500kva tx formerwent up to 138.c but came down very fast to about 100.c within 20 mins when load was reduced from 70% to 60% 147  
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