Industrial seal self study guide - SKF.com

CHAPTER 2 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. A shaft seal is a barrier designed to retain lubricants and _________________.
❑ a. confine pressure
❑ b. exclude dirt
❑ c. separate fluids
❑ d. all of the above
2 The _________________ of a seal is a cup-shaped rigid structure that
protects the head of the sealing element.
❑ a. primary lip
❑ b. outer shell (case)
❑ c. inner shell (case)
❑ d. garter spring
3. Typical radial seal applications include _________________.
❑ a. gearboxes
❑ b. motors
❑ c. pumps
❑ d. all of the above
4. Selecting the right seal depends on application parameters, including
_________________.
❑ a. shaft speed
❑ b. fluid compatibility
❑ c. operating pressure
❑ d. all of the above
5. When the seal’s basic function is to retain, the lip of the seal should
face away from the lubricant or pressure being retained.
❑ True ❑ False
6. More bearings fail from the entrance of foreign material than
from loss of lubricant.
❑ True ❑ False
1. D
2. B
3. D
4. D
5. F
6. T
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