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GATE Mechanical 1987 Question

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Cutting tools are provided with large positive rake angle mainly for
A
Increasing the strength of the cutting edge
B
Avoiding rubbing action with the finished surfaces
C
Reducing the magnitude of the cutting force
D
Better heat dissipation

GATE Mechanical 1987 Question

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If in a turning operation both the feed rate and the nose radius are doubled the surface finish values will be
A
Decreases by $$50\% $$
B
Increases by $$300\% $$
C
Increases by $$100\% $$
D
Remain unaffected

GATE Mechanical 1988 Question

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The ideal cutting fluid for low speed machining of metals should be one which
A
removes the heat faster from the cutting zone,
B
forms a coating on the cutting tool by chemical reaction
C
forms a low shear strength film of work material at the tool chip interface
D
serves as a dielectric minimizing thereby reactions due to $$EMF$$ at the interface

GATE Mechanical 1989 Question

Signle Correct Answer
The size of $$BLUE$$ in metal cutting increases with
A
very high speed
B
large uncut chip thickness
C
use of cutting fluid
D
increase in positive rake angle

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