🔍 Key Concepts

• Purpose of a twist drill gage in shop work • Key parts of a twist drill: diameter, point, clearance angle, web • What aspects of a drill are usually checked with simple hand gages vs. micrometers or protractors

💭 Think About

• Think about which feature of a twist drill most directly affects how large the hole will be and often needs to be verified before drilling. • Ask yourself: which of these measurements is more likely checked with a special shop gage rather than a ruler or standard measuring tape? • Consider which of the listed features (length, diameter, clearance angle, web thickness) are typically set or ground using angle gages or grinding fixtures instead of a drill gage.

✅ Before You Answer

• Be clear on the difference between size measurements (like how big around something is) and shape/geometry measurements (like angles). • Consider which feature a machinist most often needs to confirm quickly right at the drill press before starting a hole. • Eliminate any choices that would more naturally be measured with a ruler or protractor rather than a specialized drill gage.