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Chapter:

6. Flank wear occurs at

Tool flank below cutting edge Tool shank Tool face None of the mentioned

Tool flank below cutting edge

Tool flank are generally subjected to flank wear due to rubbing action of tool. Cutting edge may be side cutting edge or end cutting edge.

Hint Answer

7. Mechanical chipping may occur in which of following tool?

Diamond tool Mild Steel tool HSS tool None of the mentioned

Diamond tool

Mechanical chipping occurs in brittle tools. Here diamond is a brittle material.

Hint Answer

8. With an increase in rake angle of tool, tool life will

Increase Decrease Remains constant First increase then decrease

First increase then decrease

With an increase in rake angle chip flow rate increases and hence heat generated is carried away with chips at faster rate due to which tool life increases. For large back rake angle, tool become very thin and its life decrease.

Hint Answer

9. What is maximum allowed value of VB in mm for carbide tool used with cast iron work piece for a cutting condition of feed>0.3mm/rev?

0.5 1 1.5 2

2

VB denotes width of wear land. Maximum 1mm width of wear land is allowed in flank wear.

Hint Answer

10. What is optimum value of side cutting edge in degrees for maximum tool life?

20 22 25 30

30

At 30 degree chip removal rate and strength of tool are optimum and hence tool life will be maximum.

Hint Answer

11. With an increase in lip angle keeping side rake angle constant, strength of tool.

Increases Decreases Remains constant None of the mentioned

Increases

Thickness of tool tip increase with an increase in lip angle, hence strength of tool increase.

Hint Answer

12. Angle between side cutting edge and end cutting edge in top surface plane of tool.

Side rake angle Side relief angle Side cutting edge angle Nose angle

Nose angle

Nose angle is angle between side cutting edge and end cutting edge.

Hint Answer

13. What is maximum allowed value of VB in mm for HSS tool used with cast iron work piece for rough machining?

0.5 1 1.5 2

2

VB denotes width of wear land. Maximum 2mm width of wear land is allowed in flank wear.

Hint Answer

14. With passage of time, re is loss in weight of tool, this phenomenon is known as:

Thermal cracking Mechanical chipping Softening Gradual Wear

Gradual Wear

Loss of weight of tool with respect to time is known as gradual wear.

Hint Answer

15. What is maximum allowed value of VB in mm for HSS tool used with cast steel work piece for rough machining?

0.5 1 1.5 2

1

VB denotes width of wear land. Maximum 1mm width of wear land is allowed in flank wear.

Hint Answer

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All Chapters

View all Chapter and number of question available From each chapter from Manufacturing-engineering-I

Crystallography and Defects in Solid

Crystallography and Defects in Solid

Mechanical Properties and Testing and Phase Diagram

Mechanical Properties and Testing and Phase Diagram

Ferrous Metal, Non-Ferrous Metal and Heat Treatment

Ferrous Metal, Non-Ferrous Metal and Heat Treatment

Magnetic Properties of Material, Electrical Properties of Materials, Plastics, Ceramics and Composites

Magnetic Properties of Material, Electrical Properties of Materials, Plastics, Ceramics and Composites

Metal Cutting

Cutting-Tool Materials and Cutting Fluids

Cutting-Tool Materials and Cutting Fluids

Lathe Machines, Shaping and Slotting

Lathe Machines, Shaping and Slotting

Milling, Drilling and Reaming

Milling, Drilling and Reaming

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Forming, Metal Forming Processes and Heat Transfer

Forming, Metal Forming Processes and Heat Transfer

Jigs and Fixture, Applications and Gears

Jigs and Fixture, Applications and Gears

Topics

This Chapter consists of the following topics

Metal Cutting

Flank wear occurs at

Mechanical chipping may occur in which of following tool?

With an increase in rake angle of tool, tool life will

What is maximum allowed value of VB in mm for carbide tool used with cast iron work piece for a cutting condition of feed>0.3mm/rev?

What is optimum value of side cutting edge in degrees for maximum tool life?

With an increase in lip angle keeping side rake angle constant, strength of tool.

Angle between side cutting edge and end cutting edge in top surface plane of tool.

What is maximum allowed value of VB in mm for HSS tool used with cast iron work piece for rough machining?

With passage of time, re is loss in weight of tool, this phenomenon is known as:

What is maximum allowed value of VB in mm for HSS tool used with cast steel work piece for rough machining?

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