Scrapping is done by ___

This question was previously asked in
ISRO SAC Technician B Fitter 6 Nov 2016 Official Paper
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  1. Scraper
  2. File
  3. Hacksaw
  4. Chisel

Answer (Detailed Solution Below)

Option 1 : Scraper
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Detailed Solution

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Explanation:

Scrapers

  • Scrapers are used to correct slight errors on all flat or curved surfaces. Scrapers are made up of high-grade tool steel or special alloy steel and tungsten carbide-tipped tools.
  • Scraper material: High-grade tool steel or special alloy steel and tungsten carbide tipped tool.
  • Specification: The overall length of the blade and handle may range from 150 to about 500 mm.

Additional Information 

Types and uses of the scraper:

 Flat scrapers with rectangular blades

 Fitter 34 20Q Hindi - Final images q10

 Used for scraping large flat surfaces

 Hook scrapers with rectangular blades

 Fitter 34 20Q Hindi - Final images q10a

 Used for scraping the center portion of large flat surface where it is not convenient to use a flat scraper.

 Half round scraper

 Fitter 34 20Q Hindi - Final images q10b

 Used for scraping curved surfaces.

 Three square or triangular scraper

 Fitter 34 20Q Hindi - Final images q10c

 Used for scraping small diameter holes and deburring edges of accurate holes. It has a point cutting edge.

 Bull nose scraper

 Fitter 34 20Q Hindi - Final images q10d

 Used for scraping large bearings. It can be used in two ways either with circumferential movement or longitudinal movement.

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