G2 Gas Fitter Practice Exam 2025 - Free Gas Fitter Practice Questions and Study Guide

Question: 1 / 400

What is the required temperature to differentiate between hard and soft solders?

600°F

750°F

1000°F

The temperature at which to distinguish between hard and soft solders is typically around 1000°F.

Soft soldering commonly involves materials that have melting points below 600°F, while hard solders require much higher temperatures to melt and flow, typically starting around 1000°F. This allows a distinction based on the melting points, as soft solders are often made of lead-tin alloys and similarly low-melting point materials, whereas hard solders typically consist of silver or copper alloys that can withstand higher temperatures.

Knowing this temperature helps gas fitters understand the appropriate techniques and materials to use when joining pipes or fittings, ensuring strong and durable connections.

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1200°F

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