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GATE 2023 || Manufacturing & Engineering materials || Quiz 60
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Question 1
A tool with side cutting edge angle of 30 ° and end cutting edge angle of 10 ° is used for fine turning with a feed of 1 mm/rev. The nose radius of the tool is 1.25 mm. The maximum height of surface roughness produced will be ______ mm.
Question 2
In orthogonal cutting the depth of cut is 0.5 mm at a cutting speed of 3 m/s. If the chip thickness is 0.75 mm, the Chip velocity is _____.
Question 3
For increasing the material removal rate in turning, without any constraints, the right sequences to adjust the parameters?
1). speed
2). Feed
3). Depth of cut
Select the correct answer using the codes:
1). speed
2). Feed
3). Depth of cut
Select the correct answer using the codes:
Question 4
While machining with single point cutting tool of 10
rake angle, it is found that chip reduction factor is 1.88. Using Merchant’s criteria,the value of coefficient of friction is ________
rake angle, it is found that chip reduction factor is 1.88. Using Merchant’s criteria,the value of coefficient of friction is ________Question 5
In a turning operation, the tool life of the carbide tool was found to be 20 min and 100 min, at cutting speeds of 120 m/min and 80 m/min respectively. The tool life of tool under same condition but at a cutting speed of 100 m/min will be _____ min.
T1 = 20 min V1 = 120 m/min
T2 = 100 min V2 = 80 m/min
T1 = 20 min V1 = 120 m/min
T2 = 100 min V2 = 80 m/min
Question 6
A CNC lathe is used to perform a facing operation on a disc of 300 mm outer diameter and 120 mm inner diameter. Facing is done at constant speed of 135 m/min and feed rate of 0.15 mm/rev with a depth of cut of 1.5 mm. The main cutting force i.e. tangential force is 400 N. If the feed force contribution in cutting power is neglected, then specific energy of the process in J/cm3 up to places of decimal is
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