Question:-
Assertion (A): Oil as cutting fluid results in a lower coefficient of friction.
Reason (R): Oil forms a thin liquid film between the tool face and chip, and it provided ‘hydrocyanic lubrication’.
Option (A)
Both A and Rare true and R is the correct explanation of A
Option (B)
Both A and R are true but R is NOT the correct explanation of A
Option(C)
A is true but R is false
Option(D)
A is false but R is true
Correct Option:
(C)
Question Solution:
Reducing the coefficient of friction at chip-tool interface due to the formation of a weaker compound at the interface.
Figure, effect of cutting fluid on chip-tool interface bounding
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