10) Calculate the gear ratio to cut a 1/4 inch lead on a lathe with lead screw of 2TPI?

11) Which terms are needed to calculate tool life index?

12) What is the value of tool life index for cutting cast iron by cemented carbide tool?

13) What is the tool life index of cemented carbide tool for turning high carbon steel?

14) Which angle is provided on the metric screw thread micrometer anvil?