On single cut files the teeth are cut parallel to other across the file at an angle of about

23) In hacksaw blade in which of the following type setting, one teeth is bent on one side, the next is kept flat and the third on the opposite side of the first

24) A thin tube is to be cut by hacksawing blades with following T.P.I which blade is appropriate for the job?

25) A diamond point chisel is used for

26) The tapered point of the prick punch has an angle of