A dimension is stated as 25 H7 in a drawing. The lower limit is

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ISRO VSSC Technical Assistant Mechanical 14 July 2021 Official Paper
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  1. 24.75
  2. 25.00
  3. 25.25
  4. None of the above

Answer (Detailed Solution Below)

Option 2 : 25.00
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Explanation:

The dimension 25 H7 indicates a standard fit for a dimension. The fit is described using the basic size (25) and the fit designation (H7).

In this system, the "H" stands for the hole, and it represents the baseline or zero line in the fit system. The number that follows represents the tolerance range.

The "H" always corresponds to the basic size. So, for an H7 fit, the lower limit of the hole is the basic size, which is 25.00.

Therefore, the correct answer is option 2.

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