Statement I): The ceramic tools used in machining of material have highly brittle tooltips

Statement II): Ceramic tools can be used on the hard-to-machine work material.

This question was previously asked in
ESE Mechanical 2015 Paper 2: Official Paper
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  1. Both Statements I) and Statement II) are individually true and Statement II) is the correct explanation of Statement I)
  2. Both Statements I) and Statement II) are individually true but Statement II) is not the correct explanation of Statement I)
  3. Statement I) is true but Statement II) is false
  4. Statement I) is false but Statement II) is true

Answer (Detailed Solution Below)

Option 2 : Both Statements I) and Statement II) are individually true but Statement II) is not the correct explanation of Statement I)
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Detailed Solution

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Ceramic tools are sintered or powdered metallurgically produced (Aluminium Oxide) tools that are superior to carbide attached to the tool bit by brazing.

  • They have less tendency to adhere to metals during cutting.
  • Therefore, lower tendencies to form a built-up edge. That’s why ceramic tools can be used on the hard-to-machine work material.

Ceramic tooltips are highly brittle. So, they are usually attached to the shank through epoxy resins. Cutting speed of 4m/min can be achieved by these tools and its hardness is 2200 HV.

Therefore both the statements are individually true.

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