Question
Download Solution PDFAngle of centre punch is
This question was previously asked in
ISRO SAC Technician B Fitter 6 Nov 2016 Official Paper
Answer (Detailed Solution Below)
Option 4 : 90°
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ISRO Technician B: Fitter Full Test 1
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Detailed Solution
Download Solution PDFExplanation:
Punches:
- Punches are used in order to make certain dimensional features of the layout permanent.
- There are three types of punches. They are:
- Centre punch
- Prick punch
- Dot punch
Centre punch:
- The angle of the point is 90° in a centre punch.
- The punch mark made by this is wide and not very deep.
- This punch is used for locating holes.
- The wide punch mark gives good seating for starting the drill.
Prick punch:
- The angle of the prick punch is 30°.
- This punch is used for making light punch marks needed to position dividers and trammels.
- The divider leg will get proper seating in the punch mark.
Last updated on May 28, 2025
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