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Doctors Medicines MCQs Q&A

  1. Push fit
  2. Shrink fit
  3. Force fit
  4. Tight fit
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1 Answers

Option 2 : Shrink fit

Explanation:

Fit:

Fit is the relationship between two parts to be assembled, resulting from the difference between their sizes, before assembly.

Clearance fit:

  • Clearance is the difference between the size of the hole and the size of the shaft which is always positive.
  • Hole diameter is always bigger than the shaft diameter in a clearance fit.
  • Here the tolerance zone of the hole will be above the tolerance zone of the shaft.

[ alt="s" src="//storage.googleapis.com/tb-img/production/20/08/s.PNG" style="width: 388px; height: 180px;"> ​

Transition fit: 

  • It may sometimes provide clearance and sometimes interference. Here the tolerance zones of the hole and shaft will overlap each other.
  • Examples: Tight fit and push-fit, wringing fit, press fit.

[ alt="a" src="//storage.googleapis.com/tb-img/production/20/08/a.PNG" style="width: 386px; height: 192px;">

Interference fit: 

  • Interference is the difference between the size of the hole and the size of the shaft which is always negative i.e. shaft is always larger than the hole size. Here, the tolerance zone of the hole will be below the tolerance zone of the shaft.
  • Examples: Shrink fit, heavy drive fit, and light drive fit.

[ alt="d" src="//storage.googleapis.com/tb-img/production/20/08/d.PNG">

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