What is the coeffiencent Friction Angle between Steel and Ashphalt?

2519

when do we use roller bearing, deep groove ball bearing, angular bearing, sealed bearing, semi sealed bearing, unsealed bearing, anti friction bearing, journal bearing, thrust bearing

1699

Case Study Please read the case given below and answer the questions given at the end. One afternoon in June 1972, Rao, industrial engineer of P.M.A. company, was called to the office of his immediate superior V.R. Naik, the production manager. Naik said, “Rao, I want to discuss a situation in the production department. A lot of people feel that Govindan is not the right man for the Assistant Superintendent’s position. The President and others have decided that I have got to fire Govindan or at least move him out of production. Everyone wants to fire Govindan, but I won’t do it to him. I was talking with Bhadra this morning, and we decided that you might be able to make use of Govindan in your department.” Rao was surprised by both the information, and the proposal. Naik concluded his comments with, “Rao, I am asking you to take Govindan. You can say ‘No’. But then he gets fired. I have told Govindan this. Also, Govindan knows that if he goes with you he will take a pay cut. However, I think you can make use of him both to your own and his satisfaction. You are, anyway, carrying out an in-process quality control, and you might be able to make good use of Govindan in view of his long technical experience of production work. Think it over, and let me know by tomorrow.” Rao thought over the matter. PMA company had been a successful enterprise until March 1972 at which time it suffered a sharp decline of profits : sales had fallen off, and production costs had risen. The President adopted three measures which he hoped would improve the condition. First, by creating an Industrial Engineering Department for establishing work standards on all production operations, to determine which manufacturing costs were out of line and where remedial action should be taken. Rao, 28 years old, who had been with the company for two years in the Purchasing department, was selected. Rao had B.E. and MBA degrees to his credit. What he lacked in his business experience he made up by his eagerness to learn. He was ambitious and liked by his associates. He wanted a transfer from Purchasing to Production for better opportunities for advancement. Secondly, he consulted a Management Consultation firm to make a study of the Production Department. They pointed out that the chain of command was too long from Production Manager through Plant Superintendent through Assistant Superintendent to Foremen. They recommended the elimination of the position of Assistant Superintendent. Thirdly, he engaged an Industrial Psychologist to appraise all the Supervisory Personnel. Govindan had been with the company for 20 years since its founding and during this period had worked on every production operation, and his last 11 years had been in supervisory capacity. His manners were rough and aggressive, he had little formal education. The industrial Psychologist’s report about Govindan contained the following points: (i) Evaluation for the position of Assistant Superintendent : Not good enough. (ii) Capacity for good human relations in supervision : Will have friction frequently. (iii) Need for development counseling: Counseling greatly needed. (iv) General evaluation: Govindan had a good ability profile. He suffers from a sense of inferiority. He does not like the responsibility of making decisions. His supervision is that of Autocratic type. Though he has the ability, as far as his personality make-up is concerned, he is out of place in the present position. Questions: 1. What is the problem in the case? Explain. 2. Explain Govindan’s behavior and work experience vis-à- vis the psychologist’s report. 3. How do you see Naik’s suggestion to Rao? Give reasons. 4. What are Rao’s considerations in taking a decision? What should he do? Explain.

5761

Case Study Please read the case given below and answer the questions given at the end. One afternoon in June 1972, Rao, industrial engineer of P.M.A. company, was called to the office of his immediate superior V.R. Naik, the production manager. Naik said, “Rao, I want to discuss a situation in the production department. A lot of people feel that Govindan is not the right man for the Assistant Superintendent’s position. The President and others have decided that I have got to fire Govindan or at least move him out of production. Everyone wants to fire Govindan, but I won’t do it to him. I was talking with Bhadra this morning, and we decided that you might be able to make use of Govindan in your department.” Rao was surprised by both the information, and the proposal. Naik concluded his comments with, “Rao, I am asking you to take Govindan. You can say ‘No’. But then he gets fired. I have told Govindan this. Also, Govindan knows that if he goes with you he will take a pay cut. However, I think you can make use of him both to your own and his satisfaction. You are, anyway, carrying out an in-process quality control, and you might be able to make good use of Govindan in view of his long technical experience of production work. Think it over, and let me know by tomorrow.” Rao thought over the matter. PMA company had been a successful enterprise until March 1972 at which time it suffered a sharp decline of profits : sales had fallen off, and production costs had risen. The President adopted three measures which he hoped would improve the condition. First, by creating an Industrial Engineering Department for establishing work standards on all production operations, to determine which manufacturing costs were out of line and where remedial action should be taken. Rao, 28 years old, who had been with the company for two years in the Purchasing department, was selected. Rao had B.E. and MBA degrees to his credit. What he lacked in his business experience he made up by his eagerness to learn. He was ambitious and liked by his associates. He wanted a transfer from Purchasing to Production for better opportunities for advancement. Secondly, he consulted a Management Consultation firm to make a study of the Production Department. They pointed out that the chain of command was too long from Production Manager through Plant Superintendent through Assistant Superintendent to Foremen. They recommended the elimination of the position of Assistant Superintendent. Thirdly, he engaged an Industrial Psychologist to appraise all the Supervisory Personnel. Govindan had been with the company for 20 years since its founding and during this period had worked on every production operation, and his last 11 years had been in supervisory capacity. His manners were rough and aggressive, he had little formal education. The industrial Psychologist’s report about Govindan contained the following points: (i) Evaluation for the position of Assistant Superintendent : Not good enough. (ii) Capacity for good human relations in supervision : Will have friction frequently. (iii) Need for development counseling: Counseling greatly needed. (iv) General evaluation: Govindan had a good ability profile. He suffers from a sense of inferiority. He does not like the responsibility of making decisions. His supervision is that of Autocratic type. Though he has the ability, as far as his personality make-up is concerned, he is out of place in the present position. Questions: 1. What is the problem in the case? Explain. 2. Explain Govindan’s behavior and work experience vis-à- vis the psychologist’s report. 3. How do you see Naik’s suggestion to Rao? Give reasons. 4. What are Rao’s considerations in taking a decision? What should he do? Explain.

1797

Is it the relation between friction and power losses ? is it relation among stress, friction and power loses in cicular ring ?

1619

How will you size a pipe?. What is Darcy's formula?. From where you will get friction factor "f" ?. In darcy formula substitute f = 16/Re and now you see hf proportional to V instead of V square. How do you explain?.

1733

Assume a DC motor with the following parameters : Motor torque control = 0.0848 Nm/amperes Back EMF control = 0.0848 Volts/(rad/s) Armature resistance = 0.75  Moment of inertia = 0.00001696 kg/m2 With zero frictional load and taking a feed forward gain of 2, determine the motor response for a unit step function. please forwaded the answer to the below mail id thanks in advance Regrads, peer_kaba@yahoo.co.in

1459

Write a program to implement the motion of a bouncing ball using a downward gravitational force and a ground-plane friction force. Initially the ball is to be projected in to space with a given velocity vector.

1941

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?

4668

X is a solid having a white colour at room temperature. It has a density about 2g/cc. Although it has melting point near 325 degree Celsius, its properties start degrading above 260 degree Celsius. The coefficient of friction is very low about 0.1. It has very good dielectric properties especially at higher radio frequencies. It has a very high bulk resistivity. It is chemically inert. It is also resistant to van der Waals force. It is hydrophobic as well as lipophobic. Creep or ‘Cold Flow’ has been observed in X.

2189

when do we use roller bearing, deep groove ball bearing, angular bearing, sealed bearing, semi sealed bearing, unsealed bearing, anti friction bearing, journal bearing, thrust bearing

1520

Effect of surface finsh & surface roughness on coefficent of friction in form press tools.

1477

What causes friction in the cylinder?

1472

The system shown in the figure is in equilibrium. The metal spheres are identical and each has a mass of 2 kg. The surface areas of the pistons are equal and 100 square centimeters each. The density of water is 1 g per cubic centimeter. Assuming that the frictions and masses of the pistons are negligible, what is the mass of G? ( g = 10N/kg )

1645

A set of N billiard balls are set on a one-dimensional table. The table is 1 meter long, set north-south with two pockets at either side. Each ball has zero width and there is no friction so it is moving with a fixed velocity of either northward or southward and bounces back in a perfect elastic collision from other balls it encounter on its way (or drop into one of the pockets). Your job is to keep track of the balls movements. Task Please write a program that gets the initial place, speed and direction of all the balls and gives the position of a specific ball after t seconds. Input The first line contains the number of scenarios. Each one of the other lines in the input contains a scenario: The first number, N, is the number of balls; followed by N pairs of numbers: the distance in centimeters from the south end of the table and the speed (positive speed meaning it moves northward); the last two numbers are the number i of the target ball you should track and the time T in seconds. Output The output is a single number for each line which is the place (distance in centimeters from the south end of the table) of the tracked ball after T seconds. Note: There is no new line character at the end of the result. Sample Input 5 1 50 1 1 1000 1 50 1 1 6 1 60 -2 1 6 2 10 1 95 -1 2 30 2 10 1 95 -1 2 60 Sample Output 100 56 48 65 70

2125