Before changing the lathe between HI and LOW range you must ask for TA help.

• A. True
• B. False
• C. Only for certain ranges
• D. This is not required

Answer: (B)

Changing the lathe from HI to LOW range is a routine operator task once you’ve been trained and are following the lab’s standard procedures. The machine is designed so an experienced operator can select the appropriate speed range without needing a TA for every change. The key safety point is to power the machine down and follow the documented procedure before making the switch, ensuring guards are in place and you’re not attempting the change while the spindle is running. You would seek TA help if you’re unsure, if this is your first time doing it, or if you notice something unusual about the machine. So the statement is false: you don’t have to ask for TA help every time, provided you’re trained and adhere to the safety procedure.