CPCE Industry Standards & Application in Engineering Design 5

Question 1

In offshore oil and gas engineering, which DNV standard governs the use of CFD for explosion and blast overpressure analysis on topsides?

Accepted Answer

DNV-RP-C204

Answer

DNV-RP-C205

Answer

DNV-RP-F107

Answer

DNV-OS-D101

Question 2

According to ASME V&V 20, the 'validation metric' E_val is defined as the difference between:

Accepted Answer

Simulation output and experimental data, both with their uncertainties

Answer

Coarse and fine mesh solutions

Answer

Two different turbulence model predictions

Answer

Vendor benchmark and in-house results

Question 3

For biomedical device CFD analysis submitted to the FDA, which guidance document outlines the recommended computational modeling and simulation framework?

Accepted Answer

FDA Guidance on Reporting of Computational Modeling Studies in Medical Device Submissions

Answer

FDA 21 CFR Part 820

Answer

FDA 21 CFR Part 11

Answer

FDA Guidance on Software as a Medical Device

Question 4

In semiconductor cleanroom design per ISO 14644-3, CFD is used to verify which critical airflow parameter?

Accepted Answer

Unidirectional airflow uniformity and particle concentration below limits

Answer

Electrical power density of HVAC units

Answer

Water treatment system capacity

Answer

Emergency lighting distribution

Question 5

Which element of the CFD uncertainty hierarchy is considered 'aleatory' (irreducible) rather than 'epistemic' (reducible with more information)?

Accepted Answer

Turbulent fluctuation randomness in physical flows

Answer

Discretization error from coarse mesh

Answer

Iterative convergence error

Answer

Round-off error from finite precision arithmetic

Question 6

Under NFPA 72 and related fire codes, CFD fire modeling using tools like FDS must demonstrate zone model equivalence primarily to satisfy which design criterion?

Accepted Answer

Detector activation time and smoke layer height for egress safety

Answer

Minimum pipe diameter for sprinkler risers

Answer

Generator fuel capacity requirements

Answer

Emergency door hardware force limits

Question 7

The Richardson extrapolation method, recommended in ASME V&V 20 and NASA guidelines, is used in grid convergence studies to estimate:

Accepted Answer

The continuum (zero grid spacing) solution value and discretization error order

Answer

The optimal turbulence model for a given flow

Answer

The required solver RAM for a given mesh size

Answer

The experimental measurement bias