Theory Of Metal Cutting

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| By Sachin

Sachin

Community Contributor

Quizzes Created: 1 | Total Attempts: 95

Questions: 10 | Attempts: 95 | Updated: Apr 4, 2023

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Questions and Answers

1.

Which cutting condition affects the cutting temperature predominantly?
- A.
  
  Depth of cut
- B.
  
  Cutting speed
- C.
  
  Feed
- D.
  
  None of the above
Correct Answer
B. Cutting speed

Explanation
The cutting speed predominantly affects the cutting temperature. This is because the cutting speed determines the rate at which heat is generated during the cutting process. A higher cutting speed leads to more friction between the cutting tool and the workpiece, resulting in increased heat generation. Therefore, the cutting temperature is primarily influenced by the cutting speed rather than the depth of cut or feed rate.

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2.

The cutting tool removes the metal from workpiece in the form of
- A.
  
  Solid blocks
- B.
  
  Powder
- C.
  
  Chips
- D.
  
  All of the above
Correct Answer
C. Chips

Explanation
The cutting tool removes the metal from the workpiece in the form of chips. As the tool cuts into the workpiece, it creates small pieces of metal that are removed from the workpiece. These chips are typically long and thin, resembling small curls or shavings. This is the most common form in which metal is removed during machining processes. Solid blocks and powder are not typically formed during the cutting process, making them incorrect options.

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3.

The forces required for metal cutting operation
- A.
  
  Increase with increase in the feed of the tool and decreases with increase in the depth of cut
- B.
  
  Decrease with increase in the feed of the tool and increases with increase in the depth of cut on 2
- C.
  
  Increase with increase in both the feed of the tool and the depth of cut
- D.
  
  Decrease with increase in both the feed of the tool and the depth of cut
Correct Answer
C. Increase with increase in both the feed of the tool and the depth of cut

Explanation
The correct answer states that the forces required for metal cutting operation increase with both an increase in the feed of the tool and an increase in the depth of cut. This means that as the tool moves faster and cuts deeper into the material, more force is needed to overcome the resistance and remove the metal. This is because a larger feed and depth of cut result in a larger area of material being removed, requiring more force to achieve the desired cutting action.

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4.

Which type of chips form while machining of brittle materials?
- A.
  
  Continuous chips
- B.
  
  Discontinuous chips
- C.
  
  Built-up chips
- D.
  
  All of the above with some proportion
Correct Answer
B. Discontinuous chips

Explanation
When machining brittle materials, such as ceramics or certain types of metals, the formation of continuous chips is not possible due to the nature of the material. Instead, the chips that form are discontinuous, meaning they break into smaller pieces during the machining process. This is because brittle materials have low ductility and tend to fracture easily. Therefore, the correct answer is discontinuous chips.

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5.

The angle between side cutting edge and end cutting edge is called as
- A.
  
  Approach angle
- B.
  
  Nose angle
- C.
  
  Side relief angle
- D.
  
  End relief angle
- E.
  
  Option 5
Correct Answer
B. Nose angle

Explanation
The angle between the side cutting edge and the end cutting edge is known as the nose angle. This angle determines the efficiency and effectiveness of the cutting tool in terms of its ability to penetrate the material being cut. A smaller nose angle allows for a sharper cutting edge, which is ideal for softer materials, while a larger nose angle is better suited for tougher materials.

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6.

Continuous chips are formed during metal cutting operation due to
- A.
  
  Ductile work materials
- B.
  
  Large rake angle
- C.
  
  High cutting speed
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
Continuous chips are formed during metal cutting operation due to a combination of factors. Ductile work materials, which have the ability to deform plastically without fracturing, contribute to the formation of continuous chips. Additionally, a large rake angle, which is the angle between the cutting tool and the workpiece, promotes the formation of continuous chips. Finally, high cutting speed also plays a role in the formation of continuous chips. Therefore, all of the above factors contribute to the formation of continuous chips during metal cutting operations.

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7.

What is the angle Φ shown in the below diagram of basic mechanism of chip formation?
- A.
  
  Shear angle
- B.
  
  Tool rake angle
- C.
  
  Chip angle
- D.
  
  Cutting angle
Correct Answer
A. Shear angle

Explanation
The shear angle refers to the angle between the direction of the cutting force and the direction of the shear plane. It represents the amount of deformation and material removal that occurs during the cutting process. In the given diagram, the angle Φ represents the shear angle, indicating the magnitude of the shear forces acting on the material being cut.

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8.

In metal cutting operation, maximum heat (i.e. 80-85%) is generated in
- A.
  
  The shear zone
- B.
  
  The chip-tool interface zone
- C.
  
  The tool-work interface zone
- D.
  
  None of the above
Correct Answer
A. The shear zone

Explanation
In metal cutting operations, the maximum heat is generated in the shear zone. The shear zone is the region where the actual cutting of the metal takes place. As the tool comes into contact with the workpiece, it exerts pressure and causes deformation in the shear zone. This deformation generates heat due to the friction between the tool and the workpiece. Therefore, the shear zone is the primary location where the majority of the heat is generated during metal cutting.

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9.

Which of the following is the example of multi-point cutting tool?
- A.
  
  Milling cutter
- B.
  
  Broaching tool
- C.
  
  Both milling utter and broaching tool
- D.
  
  None of the mentioned
Correct Answer
C. Both milling utter and broaching tool

Explanation
Both milling cutter and broaching tool are examples of multi-point cutting tools. A milling cutter is a rotating tool with multiple cutting edges, used in milling machines to remove material from a workpiece. On the other hand, a broaching tool is a linear cutting tool with multiple teeth, used to create precision holes or slots in a workpiece. Both tools have multiple cutting edges that enable them to perform multiple cutting operations simultaneously, making them multi-point cutting tools.

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10.

Is [ Dimension accuracy is not affected in metal removal process? ] true or false?
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The statement "Dimension accuracy is not affected in metal removal process" is false. During the metal removal process, such as machining or grinding, there is always a possibility of dimensional inaccuracies. Factors like tool wear, machine vibrations, and thermal expansion can all contribute to deviations from the desired dimensions. Therefore, it is important to carefully monitor and control these variables to ensure dimensional accuracy in the metal removal process.

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Current Version
Apr 04, 2023

Quiz Edited by
ProProfs Editorial Team
Apr 03, 2020

Quiz Created by
Sachin

Theory Of Metal Cutting

Which cutting condition affects the cutting temperature predominantly?

The cutting tool removes the metal from workpiece in the form of

The forces required for metal cutting operation

Which type of chips form while machining of brittle materials?

The angle between side cutting edge and end cutting edge is called as

Continuous chips are formed during metal cutting operation due to

What is the angle Φ shown in the below diagram of basic mechanism of chip formation?

In metal cutting operation, maximum heat (i.e. 80-85%) is generated in

Which of the following is the example of multi-point cutting tool?

Is [ Dimension accuracy is not affected in metal removal process? ] true or false?