Industrial seal self study guide - SKF.com

Chapter 9 Review
To take this test, simply place a card or sheet of paper under the first question. After you’ve
read it (and answered it to yourself), slide the paper down below the next question. The
correct answer to the first problem will appear directly to the right of the new question.
Be sure not to skip any questions.
1. Premature seal failure can be caused by _________________ .
❑ a. nicks on the bore chamfer
❑ b. improper seal installation
❑ c. shaft-to-bore misalignment
❑ d. all of the above
2. If a seal’s lip shows premature wear _________________ .
❑ a. the seal may not be getting enough lubrication
❑ b. the shaft may be corroded
❑ c. the finish is too rough
❑ d. all of the above
3. A cut lip seal may have been caused by _________________ .
❑ a. a damaged seal housing
❑ b. shaft discoloration
❑ c. coked lube on the shaft
❑ d. a burr on the keyway
4. Pressures exceeding seal design limitations can cause _________________ .
❑ a. seal rupture
❑ b. inverted lips
❑ c. lubricant leakage
❑ d. all of the above
5. Heat checking or cracking is sometimes caused by lack of lubrication.
❑ True ❑ False
6. The only solution to garter spring damage is to install a replacement seal.
❑ True ❑ False
7. If high operating temperatures cannot be reduced, fluoroelastomer type seals
(SKF LongLife) can be used because of their higher temperature range.
❑ True ❑ False
1. D
2. D
3. D
4. D
5. T
6. T
7. T
9
85