Which one of the following statements is correct?
In up-milling operation, the unperformed chip thickness,
(a) Is zero at the start of the cut and increases to a maximum value just before the tooth disengages the work piece.
(b) Increases to the maximum value at the centre of the travel and decreases towards the end of tooth engagement.
(c) Has a maximum value just after the cut is started and drops to zero at the end of the cut.
(d) Remains uncharged