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SSC JE 2019-20 Metal Cutting

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Question 1

Using the Taylor Equation for tool life and letting n = 0.5 and C = 120, calculate the percentage increase in tool life when the cutting speed is reduced by 50%.

Question 2

An orthogonal cutting operation is being carried out under the following conditions Cutting speed (V)=2m/s, depth of cut=0.5 mm, chip thickness=0.6 mm

Then chip velocity is:

Question 3

The values of index ‘n’ associated with ceramic tools materials when Taylor’s tool life equation VTⁿ = constant applied is:

Question 4

Angle between flank & the face of the single point cutting tool is known as:

Question 5

A cutting tool having tool signature as 10, 9, 6, 6, 8, 8, 2 will have side rake angle _______.

Question 6

Diamond cutting tools are not recommended for machining of ferrous metals due to _________.

Question 7

What is the correct sequence of the following parameters in order of their maximum to minimum influence of tool life.
1) Feed rate
2) Depth of cut
3) Cutting speed
Select the correct answer using the codes given below :

Question 8

In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then tool life will become _____.

Question 9

Angle between the rake face and plane perpendicular to rake face is known as _______.

Question 10

The relationship of the shear angle

is as per (‘

’is rake angle and ‘

’ is friction angle)_______.

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ESE & GATE ME Manufacturing & Engg materials

Sep 8ESE & GATE ME