Meisterprüfung Tischler Practice Questions - Österreichische Meisterprüfung Für Das Reglementierte Gewerbe Tischler (einschließlich Holzgestalter) Exam

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Solid timber is an anisotropic material exhibiting different dimensional changes across its principal anatomical axes. What is the typical ratio of total shrinkage/swelling (Schwindmaß) in the longitudinal, radial, and tangential directions for native Central European timber species?

Longitudinal : Radial : Tangential ≈ 10 : 5 : 1 (longitudinal ~10%, radial ~5%, tangential ~1%) Longitudinal : Radial : Tangential ≈ 1 : 10 : 17 (longitudinal ~0.1–0.3%, radial ~3–5%, tangential ~6–10%) Longitudinal : Radial : Tangential ≈ 1 : 1 : 1 (isotropic behavior across all three grain directions) Longitudinal : Radial : Tangential ≈ 5 : 1 : 10 (radial shrinkage is negligible compared to longitudinal and tangential)

Correct Answer:

Longitudinal : Radial : Tangential ≈ 1 : 10 : 17 (longitudinal ~0.1–0.3%, radial ~3–5%, tangential ~6–10%)

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