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Chapter:

21. Adaptors in milling machines are generally used to

Hold cutters Hold the work piece on table Act as auxiliary spindle None of the mentioned

Hold cutters

Adaptors are standard attachments and used to hold milling cutters. They are used in milling operation to hold milling cutters.

Hint Answer

22. Which of following part of milling machine is used to support work piece?

Base Column Knee Table

Table

Table is used to support work piece. Cast iron has very good surface hardness and hence used for table of milling machine.

Hint Answer

23. In face milling cutters, maximum cutting is done by teeth on periphery.

True False

True

Maximum cutting in face milling cutter is generally done by teeth on its periphery.

Hint Answer

24. Which of following milling operation will require lower force of cut?

Up milling Climb milling Down milling None of the mentioned

Down milling

In up milling large force is generated due to opposite motion of tool and work piece. In up milling chip thickness increase gradually whereas in down milling chip thickness decreases gradually.

Hint Answer

25. Which of following milling process is used for machining of a number of flat horizontal and vertical surfaces simultaneously using more than two cutters at same time mounted on common arbor?

Key way milling Groove milling Gang milling Straddle milling

Gang milling

Gang milling uses multiple cutters. All cutter works simultaneously during milling operation.

Hint Answer

26. In a milling operation, feed per revolution is 0.05 mm and speed of 400 rpm. Feed per min in mm/min is equal to

1 2 0.5 0.05

2

Feed per minute= feed per revolution* speed.

Hint Answer

27. Circumference of a work piece is to be divided into 60 equal divisions using simple indexing method having 40 worm wheel teeth. Indexing movement will be

12 holes on 18 hole circle 16 holes on 18 hole circle 12 holes on 21 hole circle 16 holes on 21 hole circle

12 holes on 18 hole circle

Indexing movement = (40)/ (number of division required).Hence indexing movement is equal to 12 holes on 18 hole circle.

Hint Answer

28. Which of following will result in best surface finish of job?

Up milling Conventional milling Down milling None of the mentioned

Down milling

Down milling gives better surface finish than up milling. In down milling chip thickness decrease gradually from maximum at start of cut to zero at end.

Hint Answer

29. What will be index movement to mill a hexagon head screw by using direct indexing?

2 3 4 6

4

For direct indexing, indexing movement = (24)/ (number of division required). Hence indexing movement is equal to 4.

Hint Answer

30. Distance moved by table in mm in one minute in any direction is known as

Feed per minute Feed per tooth Feed per revolution None of the mentioned

Feed per minute

Distance moved by table in mm in one minute in any direction is known as feed per minute.

Hint Answer

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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

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Grinding, Surface Finishing Operations and Unconventional Machining Processes

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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

Milling

Drilling and Reaming

Adaptors in milling machines are generally used to

Which of following part of milling machine is used to support work piece?

In face milling cutters, maximum cutting is done by teeth on periphery.

Which of following milling operation will require lower force of cut?

Which of following milling process is used for machining of a number of flat horizontal and vertical surfaces simultaneously using more than two cutters at same time mounted on common arbor?

In a milling operation, feed per revolution is 0.05 mm and speed of 400 rpm. Feed per min in mm/min is equal to

Circumference of a work piece is to be divided into 60 equal divisions using simple indexing method having 40 worm wheel teeth. Indexing movement will be

Which of following will result in best surface finish of job?

What will be index movement to mill a hexagon head screw by using direct indexing?

Distance moved by table in mm in one minute in any direction is known as

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