14) Which lathe operation the job will be the same diameter throughout the length of job?

15) Which process of lathe operation on existing drilled or core hole will be enlarging and truing?

16) Which lathe operation raises the diameter to a small range to get a press fit on assembling?

17) Which lathe operation is intended for generating concave and convex profile on the work piece?

18) What lathe operation is manly used on the handles to provide better grip for handling purposes?