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| 1. A superior surface finish in die-sink EDM can achieved by: |
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| 3. When cutting using electrical discharge machining, the function of the fluid is to: |
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| 4. The electrode in die sink EDM could be: |
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- carbide
- graphite
- copper |
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| 5. Copper electrodes are ... when compared to graphite: |
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| 6. What kind of flushing material is used in wire EDM? |
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| de-ionized distilled water |
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| 7. The electrode in die sink EDM acts as the |
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| 8. The accuracy expected of wire EDM is |
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| 9. In wire EDM the electrode would have a positive charge (T/F)? |
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| 10. Super hard metals can be cut with wire EDM. (T/F) |
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| 11. Dielectric fluid is used only once (T/F) |
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| 12. The wire in wire EDM is used only once. (T/F) |
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| 13. The shank of the electrode in ECM must be: |
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| 14. The fluid used in ECM is: |
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| 15. Tool wear is significant in ECM (T/F) |
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| 17. Overcut is not a factor in ECM (T/F) |
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| 18. The gap between work and wheel is maintained by: |
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| 19. In ECM, 90 percent of work material is removed by: |
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| 20. An advantage of ECG is that: |
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- super hard materials can be ground as quickly as mild steel
- no stresses are created in the work
- faster than conventional grinding |
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| 21. Grinding wheels for ECG are usually made of: |
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| - Brass, copper, and stainless steel |
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| 22. Both the grinding wheel and work must be conductive. (T/F) |
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- a power supply
- mirrors
- lasing medium |
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| 24. ... is not a type of laser. |
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| 25. ... is not type of assist gas used in laser cutting |
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| 26. Lasers can leave a recast surface finish (T/F) |
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| 27. A medium powered laser would not cut: |
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| 28. The main steps in manufacturing P/M (powder metallurgy) parts are: |
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| mixing compacting, sintering |
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| 29. The purpose of powder metallurgy is primarily to: |
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| produce materials or compounds with certain properties |
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| 30. The 3 processes used to spray metalize a workpiece are wire, powder and plasma spraying (T/F) |
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| 31. Parts that are not easily made by powder metallurgy would include: |
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| 32. The powdered metal production of bearing material is advantageous because |
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| compacting can be controlled to increase porosity |
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| 33. An advantage of powder metallurgy is: |
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| 34. The most common type of unbalance is: |
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| 35. Unbalance is independent of rotational speed and is the same at rest or rotating (T/F) |
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| 36. 2 classifications of bearings are |
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| 37. Which material would be your best choice for machining a plain bearing for medium speeds and loads? |
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| 38. Which bearing material is economically used for low speeds and light loads? |
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| 39. Split plain bearings are held in place: |
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| by locking tabs or dowel pins |
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| 40. Teflon is used for bushings because: |
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| no lubrication is required |
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| 41. Taper roller bearings: |
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- are used for heavy axial loads
- are used for heavy radial loads |
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| 42. The 2 load forces concerning bearing are: |
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| can be used with only an outer race |
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| 44. O-rings are used for: |
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| static and dynamic sealing |
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| 45. Gaskets for high pressure applications are made from: |
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| 46. Gland depth for an o-ring groove would be approximately |
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| 47. Gland width for an O-ring groove would be approximately: |
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| 48. Tool post grinders use: |
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| 49. A V-belt has an included angle of 40 degrees, the sheave angle is: |
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| between 34 degrees and 38 degrees |
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| 50. The part of a V-belt that carries the load is called? |
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| 51. Which letter or letters designate a standard or classical series belt. |
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| 52. A fractional horse power belt has the designation 3L455; which means: |
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| 53. Which type of V-belt would be used in a serpentine drive |
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| 54. On drives that can not tolerate any slippage, which belt should be used? |
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| 55. To transmit full power, a V-belt it should contact the pulley groove on the sides and bottom (T/F) |
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| 56. The minimum arc of contact for a synchronous belt drive would be: |
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| 57. Idler pulleys are normally installed on the slack side of the drive. (T/F) |
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| 59. Small spool valves could be actuated by: |
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- hydraulic force
- air pressure
- mechanical linkage
- solenoid |
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| 60. What pressure will result when a force of 25lbs is exerted on an area of 5 square inches? |
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| 61. An important factor of the fluid in a hydraulic system is that it: |
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| 62. A double acting cylinder: |
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| exerts force in one direction more than the other |
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| 63. Hydraulics is based on: |
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| 64. Pressure in an hydraulic system is caused by: |
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| 65. Pressure exerted on a liquid in a closed container is transmitted equally to: |
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| 66. Force is measured in: |
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| 67. Pressure is measured in |
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| 68. The size of the hydraulic systems reservoir should be: |
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