Which statement describes the root pass backhand inclination angle for 1G welding?

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Multiple Choice

Which statement describes the root pass backhand inclination angle for 1G welding?

In a 1G root pass using the backhand (drag) technique, the torch is kept at a modest tilt to direct heat into the root and create a tightly formed bead. A tilt around 15 degrees provides the right balance: enough heat into the joint to ensure proper fusion at the root while maintaining a narrow, controlled bead. If the angle is too small, like about 5 degrees, the arc doesn’t concentrate heat into the root well enough, risking underpenetration or a weak root. If the angle is too large, such as 30 or 45 degrees, the arc starts to heat the sides more than the root, which can widen the bead, distort the root geometry, or even cause burn-through. Therefore, 15 degrees is the best choice for the root pass root backhand angle in 1G welding.

In a 1G root pass using the backhand (drag) technique, the torch is kept at a modest tilt to direct heat into the root and create a tightly formed bead. A tilt around 15 degrees provides the right balance: enough heat into the joint to ensure proper fusion at the root while maintaining a narrow, controlled bead.

If the angle is too small, like about 5 degrees, the arc doesn’t concentrate heat into the root well enough, risking underpenetration or a weak root. If the angle is too large, such as 30 or 45 degrees, the arc starts to heat the sides more than the root, which can widen the bead, distort the root geometry, or even cause burn-through.

Therefore, 15 degrees is the best choice for the root pass root backhand angle in 1G welding.

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