Assertion (A) : The ratio of uncut chip thickness to actual chip thickness is always less than one and is termed as cutting ratio in orthogonal cutting. Reason (R) : The frictional force is very high due to the occurrence of sticking friction rather than sliding friction.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not a correct explanation of A

Assertion (A) : The ratio of uncut chip thickness to actual chip thick

1.	Assertion (A) : The ratio of uncut chip thickness to actual chip thickness is always less than one and is termed as cutting ratio in orthogonal cutting. Reason (R) : The frictional force is very high due to the occurrence of sticking friction rather than sliding friction.
A.	Both A and R are true and R is the correct explanation of A
B.	Both A and R are true but R is not a correct explanation of A
C.	A is true but R is false
D.	A is false but R is true
Answer» D. A is false but R is true

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Assertion (A) : The ratio of uncut chip thickness to actual chip thickness is always less than one and is termed as cutting ratio in orthogonal cutting. Reason (R) : The frictional force is very high due to the occurrence of sticking friction rather than sliding friction.

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