🔍 Key Concepts

• Examine the shape and orientation of the cutting edge on toolbits A–G and relate them to the direction of feed on a lathe. • Recall how right-hand vs left-hand toolbits are defined: which way they are designed to cut when the work rotates toward the operator. • Match each toolbit’s geometry to the type of operation on workpieces I–VII (facing, straight turning, threading, grooving, center drilling).

💭 Think About

• For each option, ask: given normal lathe rotation, would this tool’s cutting edge properly lead the cut in the stated feed direction? • Look closely at workpiece VI and decide what machining operation created its shape—does that operation normally use a standard toolbit like E, or something more like G? • Compare toolbits E and F: which one has a cutting edge suited to moving across a face, and which to moving along the length of a shaft?

✅ Before You Answer

• Be sure you know which way the work is assumed to rotate in the standard exam illustration and how that affects feed direction. • Verify for each toolbit where the relief angle and rake face are located; the cutting edge must meet the work first in the stated direction of feed. • Confirm which workpiece figure (I–VII) clearly shows a faced shoulder vs a drilled/centered end, and match that to the only toolbit that can realistically perform that operation.