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Motors ch 17

Motor Alignment

QuestionAnswer
1. ___ soft foot is a condition that exits when eternal forces are applied to the machine. Induced
2. ___ misalignent is the situation where two shafts are parallel but are not on the same axis. Offset
3. The ___ alignment method uses two dial indicators to take readings of opposing side of coupling rims, giving two sets of shaft runout readings. reverse dial
4. Rough handling of a macine or uneven mounting pads due to poor machining or welding often causes ___ soft foot. angular
5. Machined washers that are two to three times thicker than the original washer can be used to correct the dowel effect. True or False True
6. ___ soft foot is prevented by using clean, solid bases with all paint, grime, rust, and corrosion thoroughly removed. Springing
7. When using the shaft deflection method of measuring soft foot, the dial indicator may interfere with loosening of anchor belts. True or Fale False
8. Temperature changes resulting in thermal expansion may be caused by the ___. all of the above. heat from a loaded motor, high ambient (room) temperature, temperature of the pumped product.
9. Readings on a dial indicator must begin at zero to determine total movement. True or False False
10. If the beginning reading on a dial indicator is 0.018" and the end reading is -0.003", then the total indicator reading is ___. 0.021
11. The first adjustment when performing shaft alignment should be ___. angular alignment in the vertical plane
12. The accuracy of ___ alignment is within 0.0002" laser
13. The machine to be shimmed (MTBS) is chosen because it is ___. easier to move
14. Jackscrews are used to make ____ movements of a machine to be shimmed (MTBS). horizontal
15. The last adjustment when performing shaft alignment should be ___. parallel alignment in the horizontal plane
16. Nope is the comment Josh wrote in
17. All anchor bolts can be loosened and both machines shifted to try to align two machines if sufficient movement is not available at the machine to be shimmed. True or False True
18. Nope is Josh's note
19. A feeler gauge is more reliable than a taper gauge for measuring angular misalignment. True or False False
20. ____ misalignment must not exceed 1/2 degree and may be corrected using a level placed on top of the pulley parallel with the pulley shaft. angular
21. To take ___ readings, the coupling must be disconnected and both coupling halves rotated together. rim-and-face
22. With the electronic reverse dial method, thermal expansion compensation information can be entered into an alignment calculator. True or False True
23. Induced soft foot is a condition that exists when the bolt hole of a machine is so large that the bolt head forces the washer into the hole opening on an angle. True or False False
24. A ___ is a rigid steel support for firmly coupling and aligning to or more rotating devices. base plate
25. A drilled and tapped base plate that is used to anchor a machine must have a thickness that is a minimum of ___ times the root diameter of the anchoring bolts. 1 1/2
26. Identify the bolt anchoring problems in illustration page 84 A = Bolt Bound B = ? C = Bolt Bottom Out D = ? has to be dowel effect or excess bolt body
27. From the illustrtion, the alignment method shown is the ___ method. reverse dial
Created by: JoshHampton
 

 



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