MT UNIT I Tool life, surface finish, cutting fluids

What is tool life in metal cutting?

• The time until the tool becomes dull

• The time the tool lasts before being replaced

• The total amount of cutting performed by a tool

• The maximum speed at which the tool can cut

What is the purpose of tool life in metal cutting?

•             To determine the cost of the tool

• To determine when to replace the tool

• To determine the speed of cutting

• To determine the surface finish

What factors affect tool life in metal cutting?

• The type of cutting tool material

• The speed of cutting

• The temperature during cutting

• All of the above

What is the definition of surface finish?

• The final appearance of a machined surface after cutting    

• The measurement of tool wear

•            

  The measurement of the material removal rate         

• The size of the cutting tool

What is the unit of measurement for surface finish?

• Inches

• Micrometers

• Feet

• Millimeters

What factors affect the surface finish of a machined surface?

• Cutting speed

• Cutting tool material

• Cutting tool geometry

• All of the above

What is the main purpose of using cutting fluids in metal cutting?

• To reduce heat generated during cutting

• To increase tool life

• To improve surface finish

•  To reduce cutting forces

What is the most common type of cutting fluid used in metal cutting?

• Oil-based

• Water-based

• Air-based

• None of the above

What is the main function of cutting fluids in metal cutting

•  To cool the cutting zone

• To lubricate the cutting zone

• To improve surface finish

•  To reduce cutting forces

    What is Machinability?

• Ability of a material to be machined easily

• Ability of a cutting fluid to be machined easily

• Ability of a tool to be machined easily

• None of the above