Mechanical Engineering : Machine Design QUESTIONS AND ANSWERS :: part5 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.I.S. specifies following total number of grades of tolerances |
| 18 |
| 16 |
| 20 |
| 22 |
| 14. |
7.In oiliness bearings |
| the oil film pressure is generated only by the rotation of the journal |
| the oil film is maintained by supplying oil under pressure |
| do not require external supply of lubricant |
| grease required to be applied after some intervals |
| none of the above. |
8.In hydrodynamic bearings |
| the oil film pressure is generated only by the rotation of the journal |
| the oil film is maintained by supplying oil under pressure |
| do not require external supply of lubricant |
| grease is used for lubrication |
| none of the above. |
9.In hydrostatic bearings |
| the Oil film pressure is generated only by the rotation of the journal |
| the oil film is maintained by supplying oil under pressure |
| do not require external supply of lubricant |
| grease is used for lubrication |
| none of the above. |
10.The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is |
| 0.01 micron |
| 0.1 micron |
| 1 micron |
| 10 microns |
| 25 microns. |
More Machine Design QUESTIONS AND ANSWERS available in next pages
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