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Question

Which feature in tolerance diagrams visually indicates transition fit?

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is

Overlapping tolerance zones of hole and shaft relative to zero line

To determine which feature in tolerance diagrams visually indicates a transition fit, let's examine the given options and understand how tolerance zones work for hole and shaft fits:

  • Completely separated tolerance zones of hole and shaft: This would indicate a clearance fit, not a transition fit, as there is no overlap.
  • Overlapping tolerance zones of hole and shaft relative to zero line: This is characteristic of a transition fit. In a transition fit, the tolerance zones for the hole and shaft overlap. Depending on the actual sizes, the assembly could result in either a tight fit or a loose fit. This overlap is what distinguishes a transition fit from other types of fits.
  • Shaft tolerance zone entirely above hole tolerance zone: This would indicate a clearance fit, where the shaft is always smaller than the hole, allowing for free movement.
  • Hole tolerance zone entirely above shaft tolerance zone: This describes an interference fit, where the hole is always smaller than the shaft, requiring forceful assembly.

Based on the analysis above, the correct answer is Overlapping tolerance zones of hole and shaft relative to zero line. This feature is indicative of a transition fit, where both tight and loose fits are possible due to overlapping tolerances.

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Similar Questions

  1. The difference between the maximum limit of size and minimum limit of size in assembling a product is known as:

  2. The number of fundamental tolerance in the Indian Standard System are:

  3. In an assembly, Hole size is smaller than shaft size then this type of fit is known as ______

  4. The measured size of the dimension of a component is called ______ size.

  5. The tolerance limit is 50.3 ± 0.05 mm.

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  6. When tolerance is given on both sides of the basic dimension, it is called:

  7. When tolerance is given on one side of the basic dimension, it is called:
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Important Questions from Limits and Fits

  1. Which one of the following dimensions shows the largest tolerance?

  2. In mass production, parts made to definite limit of error is called as ______

  3. Name the fit, in which the shaft is cooled below the room temperature until it fits into the hole, then assembly is allowed to attain room temperature.

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