🔍 Key Concepts

• Root opening is the gap between the two pieces at the bottom of the joint before welding • Each dimension on the sketch refers to a specific joint feature: bevel angle, root face, and root opening • The label near the very center gap between the plates shows the allowed size range for the root opening

💭 Think About

• On the illustration, which dimension is placed directly between the two plate edges at the joint centerline? • Which choice matches the numerical range shown for that center gap, rather than the bevel angle or land thickness? • Can any of the other answer choices describe the 60° angle or the 1/32"–1/8" land instead of the root opening?

✅ Before You Answer

• Identify the dimension line drawn horizontally between the two plate ends at the root of the joint • Confirm that this center dimension is given as a range, not a single fixed size • Make sure you are not confusing the included angle (60°) or the land thickness (1/32" to 1/8") with the root opening