Industry Standards & Application in Engineering Design Flashcards
7 cards from real CPCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Industry Standards & Application in Engineering Design flashcards as text
According to ASME V&V 20, what is the primary purpose of validation in CFD simulations?
Answer: To assess how accurately a model represents physical reality
ASME V&V 20 defines validation as the process of determining how accurately a computational model represents the real physical system.
Which AIAA standard provides guidelines for assessment of experimental uncertainty in CFD validation experiments?
Answer: AIAA G-077
AIAA G-077 provides guidelines for the estimation and reporting of uncertainty in wind tunnel testing used for CFD validation.
In the context of ISO 9001:2015, which element is most critical when establishing a CFD simulation workflow for aerospace components?
Answer: Documenting process controls and traceability
ISO 9001:2015 requires documented information for process control and traceability to ensure quality management system compliance.
What does the concept of 'numerical diffusion' relate to in CFD industry practice and mesh design standards?
Answer: Artificial smoothing introduced by low-order discretization schemes
Numerical diffusion is a truncation error artifact of low-order upwind schemes that artificially smears gradients, addressed by using higher-order schemes or finer meshes.
Under ASME PTC 19.1, when reporting CFD validation results, which combination must be included?
Answer: Bias error, precision error, and total uncertainty
ASME PTC 19.1 requires reporting of both bias and precision error components to fully characterize total measurement uncertainty.
Which regulatory body requires CFD analysis to meet DO-160 environmental conditions for aircraft system certification?
Answer: FAA
The FAA mandates that aircraft systems, including thermal and fluid analyses supporting certification, comply with DO-160 environmental conditions.
In industrial CFD practice, what is the primary function of a 'topology-preserving' mesh generation approach per NAFEMS best practice?
Answer: Maintaining geometric feature fidelity during remeshing
Topology-preserving meshing ensures that geometric features such as edges, corners, and curvature are accurately represented without degradation during mesh generation.