To properly cut an odd numbered thread with a lathe using the thread dial indicator illustrated, you should close the lathe split, or half-nut on __________. Illustration GS-0084

Correct Answer: Option A — any numbered line on the dial

When cutting odd-numbered threads, the half-nut must be engaged only on numbered lines on the thread dial. This ensures that the lead screw and the carriage are in the correct relative position to pick up the thread groove, preventing the tool from cross-threading or damaging the work during the cutting process.