Red Seal Glazier Practice Exam

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What is the main role of UV blocking coatings in residential glass?

To enhance clear visibility
To reduce UV light transmission and prevent fading of interior materials
To increase energy efficiency in windows
To strengthen the glass against impact

The correct answer is: To reduce UV light transmission and prevent fading of interior materials

The main role of UV blocking coatings in residential glass is to reduce UV light transmission and prevent fading of interior materials. These coatings are designed to filter out harmful ultraviolet rays that can cause significant damage over time to furniture, carpets, artwork, and other interior decorations. By blocking a substantial portion of UV radiation, these coatings help maintain the longevity and aesthetic quality of these materials, thus minimizing the need for replacement or repair due to sun damage. While energy efficiency in windows and impact strength are important considerations in glazing, these functions are not the primary purpose of UV blocking coatings. Enhancing visibility is also not relevant here, as the main concern with UV coatings is protecting interior elements from the effects of sunlight rather than improving clarity.