Industrial seal self study guide - SKF.com

47. _________________ seals have three sealing lips: one primary lip
to keep oil in, two secondary lips to keep dirt out.
❑ a. Scotseal oil bath
❑ b. Scotseal Plus oil bath
❑ c. both of the above
❑ d. neither of the above
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48. _________________ seals can be installed by hand, using no more
than common shop tools if any at all.
❑ a. Scotseal oil bath
❑ b. Scotseal Plus oil bath
❑ c. both of the above
❑ d. neither of the above
49. If high operating temperatures cannot be reduced, _________________ type seals
(LongLife) can be used because of their higher temperature range.
❑ a. nitrile
❑ b. large diameter
❑ c. fluoroelastomer
❑ d. none of the above
50. To help ensure proper seal performance, the _________________ .
❑ a. entrance edge should be chamfered or rounded
❑ b. surface finish should be 8-17 micro inches (.20-.43 micro meter)
❑ c. shaft surface should have no machine lead
❑ d. all of the above
51. _________________ is an acceptable sealing lip material substitute for nitrile.
❑ a. Leather
❑ b. Felt
❑ c. Another nitrile
❑ d. none of the above
52. On some seals, SKF applies a coating of Bore-tite to the _________________ which
fills minor bore imperfections.
❑ a. I.D.
❑ b. O.D.
❑ c. both of the above
❑ d. none of the above
53. Speedi-Sleeves provide a _________________ that is superior to most original
shaft material.
❑ a. sealing surface
❑ b. stainless steel construction
❑ c. both of the above
❑ d. none of the above
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