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Motors ch 15
Bearings
| Question | Answer |
|---|---|
| 1. ___ is the general wear of rolling contacts where metal pieces flake away the surfaces in contact, leaving a roughened surface. | Spalling |
| 2. ___ is bearing damage due to axial force | Thrust damae |
| 3. Friction bearings are quieter, less expensive, and have less metal fatigue than other bearings. True or False | True |
| 4. A ___-fit installation can be accomplished by using a piece of tubing, steel plate, and a hammer or an arbor press. | press |
| 5. A ___ bearing is a rolling-contact bearing that has cylindrical or tapered steel rollers confined between inner and outer rings. | roller |
| Name the types of bearings | Conrad, friction, roller, and ball |
| 6. __ is damage caused by chemical reactions between the lubricant and the metal bearing. | Surface reaction |
| 7. In many cases, __ is a normal condition that appears as discoloration on the outer surface of the outer ring between the outer ring and the housing | fretting corrosion |
| 8. ___ may appear as lack of wear or fretting on the surface of the outer ring. | Misalignment wear |
| 9. ___ roller bearings are normally used for heavy radial and adjustable axial loads | Tapered |
| 10. Fluting marks occur at the same distance apart between ball bearings, similar to indentations from Brinell damage. True or False | False |
| 11. __ roller bearings have a high radial load capacity but are not designed for axial loads and cannot tolerate misalignment | Cylindrical |
| 12. A rotatiing shaft reting horizontally on a earing surface has a __- load due to the weight of the shaft itself. | radial |
| 13. ___ bearings contain an outer ring (cup_ and rollers that are retained in a cage and bear directly on the rotating shaft. | Needle |
| 14. ___ bearings are used in areas of heavy loads where space is limited. | Friction |
| 15. Bearings fail more often due to poor installation rather than malfunction of the bearing. True or False | True |
| 16. When bearing parts need to be cleaned, __ should be used | lightweight oil |
| 17. A ___ is the bearing surface of a rolling-contact bearing that supports the rolling elements. | race |
| 18. The best heating method to expand a bearing uses a ___. | hot oil bath |
| 19. Bearing installation is more difficult than bearing removal. True or False | False |
| 20. A hammer dropped on a bearing, a dropped bearing, or a bearing pressed onto the shaft by the application of force to the non-rotating ring creates ___ | Brinell damage |
| 21. Pressure should be applied on the outer ring of a bearing if the inner ring is press fit. True or False | False |
| 22. An ___ closes spaces between moving and stationary components in mechanical systems. | oil seal |
| 23. A common mistake when greasing a bearing i ___ | overlubricating |
| 24. A ___ allows bearings to be inserted into a housing and held at a certain depth. | snap ring |
| 25. A ___ bearing is a rolling-contact bearing that permits free motion between a moving part and a fixed part by means of balls confined between inner and outer rings. | ball |
| 26.When a load is placed vertically on a bearing, as shown in the illustration, this represents an ___ load. | axial |
| 27.Identify the type of bearings shown in the illustration page 74. | A= Brunell damage B= sparring C= pitting D= flueting |
Created by:
JoshHampton