Tool Measurements and Cutting

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1)   The tool life is influenced maximum by

  • [A] Cutting speed
  • [B] Surface conditions of the workpiece
  • [C] Skill of the operator
  • [D] Cutting fluid

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Cutting speed

2)   Tool life may be measured by the

  • [A] Total time the tool has been in contact with the job
  • [B] Number of work pieces machined between tool sharpening
  • [C] Time for the flank wear to reach a certain dimension
  • [D] Any one of the above

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Any one of the above

3)   Choose the coolant that would be most appropriate for light cuts on aluminum alloys

  • [A] Soluble oil or emulsions
  • [B] Kerosene
  • [C] Straight fatty oil
  • [D] Mineral oil

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Kerosene

4)   Which is not the primary function of coolant in a metal cutting operation

  • [A] To reduce the friction at the cutting point
  • [B] To help in giving bright shining surface to the job
  • [C] To improve the cutting action
  • [D] To cool the tool and work piece and conduct the heat generated

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To cool the tool and work piece and conduct the heat generated

5)   The cutting speed of a tool refers to

  • [A] Revolution made by the tool in a specified time
  • [B] Revolutions turned by the job in a specified time
  • [C] Rate at which cutting edge of the tool passes over the surface of work piece
  • [D] Distance travelled by the tool in one revolution of the job

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Rate at which cutting edge of the tool passes over the surface of work piece

6)   Tool signature

  • [A] Is a numerical method of tool identification
  • [B] Is a pictorial view of the tool
  • [C] Outlines the orthographic projection of the tool
  • [D] Represents complete specification of the tool

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Is a numerical method of tool identification

7)   With an increase in nose radius of single point cutting tools

  • [A] Excessive heat is generated
  • [B] Tool life increases
  • [C] Cutting speeds have to be kept small
  • [D] Surface finish deteriorates

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Tool life increases

8)   Single point thread cutting tool should ideally have

  • [A] Negative rack
  • [B] Positive rack
  • [C] Zero rack
  • [D] Zero rack angle

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Zero rack angle

9)   Cutting tool may be provided with large positive rack angle to

  • [A] Reduce the magnitude of cutting forces
  • [B] Avoid rubbing with the finished surface
  • [C] Increase the strength of cutting edge
  • [D] Have a better heat dissipation

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Reduce the magnitude of cutting forces

10)   The angle between the face and the flank of the single point cutting tool is known as

  • [A] Lip angle
  • [B] Clearance angle
  • [C] Point angle
  • [D] Rack angle

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Clearance angle

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