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An emergency exit sign is hidden behind decorative lighting. Which design principle has failed?

Answer and explanation

Correct answer: Functional visibility

The governing concept is functional visibility: information that guides safety-related action must be immediately noticeable and readable. An emergency exit sign has a practical purpose, so decorative lighting must not obscure its shape, contrast, or location. Option D is correct because the sign cannot perform its function when hidden. The issue is not necessarily illustration, colour choice, or general harmony.

Related tags

Emergency SignageFunctional VisibilitySafety DesignVisual CommunicationCommunication Skills IArtificial IntelligenceClass 9 Mcq

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