# Machine Tools Questions and Answers – Lathe : Working Principle

This set of Machine Tools Multiple Choice Questions & Answers (MCQs) focuses on “Lathe Working Principle”.

1. The swing diameter over the bed is the largest diameter.
a) true
b) false

Explanation: This is correct. The maximum diameter of work above the bed that will revolve without hitting the height of the centres measured from the lathe’s bed is called the swing diameter.

2. Lathe cannot produce internal features like holes.
a) true
b) false

Explanation: This is false. Lathe is a versatile machine tool. It can produce holes, flat surfaces and so on.

3. Which type of feed is needed in facing operation?
a) longitudinal
b) cross
c) both cross and longitudinal
d) none of the mentioned

Explanation: The cross feed is used to perform the facing operation. The workpiece is spun against the single point cutting tool while facing.

4. Which type of surface is produced in facing operation?
a) cylindrical
b) taper
c) flat
d) none of the mentioned

Explanation: According to the definition, a flat surface is formed during the facing operation. The tool removes metal from the end of the metal during the facing procedure, resulting in a flat surface.

5. Traversing of tool at any angle to the job axis produces curve surfaces.
a) true
b) false

Explanation: This is false. Traversing of tool at any angle to the job axis produces taper surfaces.

6. In taper operation, which type of surface is produced?
a) flat
b) curve
c) circular
d) none of the mentioned

Explanation: In the process of taper turning, a taper type surface is created. Taper is a form in which the diameters of the bar’s two ends differ.

7. Which type of feed is needed in turning operation?
a) longitudinal
b) cross
c) both cross and longitudinal
d) none of the mentioned

Explanation: In a turning operation, longitudinal feed is required by definition. Longitudinal feed is always parallel to the spindle’s axis of rotation.

8. Which type of surface can be produced by lathe?
a) flat
b) cylindrical
c) curvilinear
d) all of the mentioned

Explanation: A lathe is a machine that can be used in a variety of ways. It is capable of a wide range of tasks. It is primarily designed to create cylindrical surfaces, although it can also create other sorts of surfaces.

9. Which machine tool is known as the mother machine tool?
a) drill
b) milling
c) lathe
d) none of mentioned

Explanation: Lathe is known as the mother machine tool because it
can perform various type of operations. It is a versatile machine.

10. Lathe is primarily used for producing ____surfaces.
a) flat
b) curve
c) taper
d) none of the mentioned

Explanation: The lathe is most commonly used to create cylindrical surfaces. However, it can now execute a variety of operations and work on a variety of surfaces, including curved surfaces, flat surfaces, and so on.

11. Which type of surface is produced by turning operation in lathe machine?
a) flat
b) cylindrical
c) taper
d) none of the mentioned

Explanation: The turning procedure in a lathe machine creates a cylindrical surface. This turning can be done on the outside of the building. Boring is a type of turning that takes place on the inside surface.

12. What is the necessary condition for turning?
a) material of work piece should be harder than the cutting tool
b) cutting tool should be harder than the material of work piece
c) hardness of the cutting tool and material of of piece should be same
d) none of the mentioned

Explanation: To be able to cut the work piece into the desired shape, the cutting tool should be harder than the material of the work piece.

13. Traversing of tool parallel to the axis of job is termed as_____
a) cross feed
b) longitudinal feed
c) both cross feed and traversing feed
d) none of the mentioned

Explanation: The term “longitudinal feed” comes to mind. Cross feed is the same as traversing a tool perpendicular to the task axis.

In the metalworking business, the lathe machine is one of the most significant machine tools. It works on the basis of a spinning workpiece and a stationary cutting tool. The cutting tool is inserted into the workpiece, which then spins around its own axis, forming the desired shape. The term “longitudinal feed” comes to mind. Cross feed is the same as traversing a tool perpendicular to the task axis. Turning is a method that requires rotating a part while moving a single-point cutting tool parallel to the rotation axis. Turning can be done on both the external and internal surfaces of the part (the process known as boring).