What is the most commonly standard length of a feeler gauge blade?

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 1
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  1. 25 mm
  2. 65 mm
  3. 100 mm
  4. 50 mm

Answer (Detailed Solution Below)

Option 3 : 100 mm
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Detailed Solution

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Concept:

  • A feeler gauge is a tool used to measure gap widths.
  • Feeler gauges are mostly used in engineering to measure the clearance between two parts like spark plug gaps, bearing clearance, the gap between the mating parts, etc.  
  • They consist of a number of small lengths of steel of different thicknesses with measurements marked on each piece.
  • Blade length – Standard blade lengths are typically around 3-5 inches (75 - 127 mm), but long blades might be 12 inches (304.8 mm) and shorter blades around ¾ - 1 inch.
  • The most common standard length of a feeler gauge blade is 100 mm

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