Industrial seal self study guide - SKF.com

61. A combination seal or a double lip seal will always do a better job than a single lip
design.
❑ True ❑ False
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62. Roto preening is recommended to dress the shaft and remove lead introduced during
the machine operation.
❑ True ❑ False
63. The only solution to garter spring damage is to install a replacement seal.
❑ True ❑ False
64. The best prelube to use is the lubricant being retained by the seal.
❑ True ❑ False
65. When determining the cause of a leak, remove the seal immediately and inspect it.
❑ True ❑ False
66. For very severe conditions, SKF’s HDDF seals resist abrasives that cause other
seals to fail
❑ True ❑ False
67. When a Speedi-Sleeve is used to repair a damaged shaft, it is inexpensive and
requires little machine downtime.
❑ True ❑ False
68. A cocked seal is perpendicular to the shaft and bore.
❑ True ❑ False
69. Waveseals (CRW5 and CRWA5) perform better than conventional lip seal designs
in pressure applications, and can be used to replace some mechanical seals.
❑ True ❑ False
70. Substitute lip material will extend a seal’s life, no matter which material is chosen.
❑ True ❑ False
71. If there is a history of seal failures for a particular installation, the problem may not
be the seal’s fault.
❑ True ❑ False
72. Spiral grooves (machine lead) may promote seal leakage.
❑ True ❑ False
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