A tailstock 'dead center' has been given that name because it __________.

Correct Answer: Option D — does not revolve

A lathe 'dead center' is a hardened steel cone that fits into the tailstock spindle and supports the workpiece. It is termed 'dead' because it remains stationary while the workpiece rotates against it. Proper lubrication is required at the contact point to prevent friction and overheating during the turning operation.