NCIDQ IDFX Practice Exam

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What is the recommended NRC value for ceiling tiles in open-plan offices?

0.4 or lower
0.5 to 0.7
0.85 or higher
1.0 only

The correct answer is: 0.85 or higher

The recommended NRC (Noise Reduction Coefficient) value for ceiling tiles in open-plan offices is typically 0.85 or higher. This elevated NRC value indicates that the ceiling tiles are very effective at absorbing sound within the space, which is crucial in open-plan offices where noise can be a significant distraction. In these environments, maintaining a comfortable acoustic atmosphere is essential for productivity and privacy. A higher NRC value means that the tiles can help reduce reverberation and echo, leading to a quieter and more conducive working environment. This is particularly important in open spaces where sound can travel freely. The alternatives, which suggest lower NRC values, would not provide sufficient sound absorption needed to mitigate noise issues commonly found in open-plan settings. Tiles with NRC values less than 0.85 would likely lead to higher noise levels, potentially impacting employee focus and comfort. Thus, selecting ceiling tiles with an NRC of 0.85 or higher is essential for optimal acoustic performance in open-plan offices.