Which of these is a personal error?

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PGCIL DT Civil 2020 Official Paper
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  1. Blunt pivot
  2. Sluggish needle
  3. Pivot being bent
  4. Inaccurate centering

Answer (Detailed Solution Below)

Option 4 : Inaccurate centering
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Detailed Solution

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Concept:

Personal Errors:

The personal error comes into existence because of the following reasons:

  • Improper reading of the observations
  • Improper adjustment of the instrument before taking observations
  • Improper handling of instruments


Explanation:

Inaccurate centering is due to Improper adjustment of the instrument.

∴ Inaccurate centering can be classified as a personal error.

Additional Information

Blunt pipe  → Will cause instrumental error

Sluggish needle → Will cause instrumental error

Pivot being bent → Will cause instrumental error

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