Minnesota Special Engineer Boiler License Practice Exam 2026 - Free Boiler License Practice Questions and Study Guide

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How does altitude affect the boiling point of water?

It increases the boiling point

It decreases the boiling point

The boiling point of water is affected by altitude due to changes in atmospheric pressure. At higher altitudes, the atmospheric pressure is lower than at sea level. Since boiling occurs when the vapor pressure of a liquid equals the surrounding atmospheric pressure, a decrease in pressure means that water will reach its boiling point at a lower temperature. This is why at higher elevations, such as in mountainous regions, water boils at temperatures below the standard 100°C (212°F) typical at sea level. Understanding this principle is crucial for anyone involved in processes that rely on boiling water or steam generation, as adjustments may need to be made for cooking, baking, or any industrial applications involving boilers.

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It has no effect on the boiling point

It makes boiling point inconsistent

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