Red Seal Glazier Practice Exam 2025 – Complete Guide for Your Test Prep

Question: 1 / 400

What is the effect of UV radiation on untreated glass?

It strengthens the glass structure

It can lead to fading of interior furnishings

Untreated glass is susceptible to ultraviolet (UV) radiation from the sun, which can cause significant damage to materials and surfaces that it comes into contact with. One of the notable effects of UV radiation is the fading of interior furnishings, such as fabrics, carpets, and artwork. This happens because UV rays can break down the chemical bonds in dyes and pigments, resulting in discoloration and loss of vibrancy over time.

While the other options mention potential effects related to glass and UV exposure, they do not accurately represent the direct impact of UV radiation on untreated glass. For instance, UV radiation does not strengthen the structure of glass, create decorative effects, or contribute to thermal expansion in a manner that is distinct from other factors such as temperature changes. The fading of interior furnishings is a well-documented consequence of prolonged UV exposure, making it the correct answer in this context.

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It creates a decorative effect on the glass

It causes thermal expansion in the glass

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