Level 3 Engineering Fitter Practice Exam

On a lathe, turning and facing accomplish different material removal tasks. Turning involves feeding the cutting tool along the length of the rotating workpiece, which removes material from the outer surface and reduces the diameter along the length. Facing, on the other hand, moves the tool perpendicular to the axis across the end of the workpiece, removing material to produce a flat end face. So the statement that turning reduces diameter along the length and facing creates a flat surface on the end face correctly describes what each operation does. The other ideas don’t fit because facing doesn’t change the diameter along the length, and turning doesn’t create a flat end face; also, the two operations don’t remove material in the same way since they use different tool paths and produce distinct features.