Gas welding technique — torch/rod angle comparison In back-hand (rightward) oxy-acetylene welding, the angle between the welding rod/torch and the work surface is __________ compared to fore-hand (leftward) welding.

Introduction / Context:
In oxy-acetylene welding, torch position and filler rod angle influence heat distribution, puddle control, and penetration. Two classic techniques are fore-hand (leftward) and back-hand (rightward) welding. This item focuses on the typical difference in torch/rod angle between these techniques.

Given Data / Assumptions:

• Fore-hand welding leads the flame in the direction of travel.
• Back-hand welding trails the flame behind the puddle.
• Typical recommended angles differ in standard practice.

Concept / Approach:
Fore-hand welding commonly uses a smaller torch angle to the work (for example about 40°–50°). Back-hand welding typically increases the angle (for example about 60°–70°) to direct more heat into the solidifying bead and improve penetration on thicker sections.

Step-by-Step Solution:
Compare techniques: fore-hand uses a smaller included angle; back-hand uses a larger one.Purpose: larger angle in back-hand concentrates heat behind the puddle, aiding fusion and penetration.Conclusion: the angle in back-hand welding is more than in fore-hand welding.

Verification / Alternative check:
Standard welding handbooks illustrate rightward technique with a steeper torch inclination than leftward technique, consistent with the need for deeper penetration and improved bead contour on thicker plate.

Why Other Options Are Wrong:
'Less' and 'same' contradict common procedure guides; 'variable but smaller/equal' mischaracterizes the typical recommendation.

Common Pitfalls:
Holding the torch too vertical causing excessive surface heating; copying angles blindly without adapting to joint type and thickness; forgetting to coordinate travel speed with angle changes.

Final Answer:
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