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-C204 covers design against accidental loads including explosion blast overpressure, where CFD-based explosion modeling (e.g., FLACS) is widely applied.

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

E_val = S - D, where S is the simulation result and D is the experimental datum, with both quantities carrying their respective uncertainty estimates.

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

The FDA issued specific guidance on computational modeling (including CFD) in medical device submissions, defining credibility assessment requirements.

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

ISO 14644-3 testing requires verification that cleanrooms achieve specified unidirectional airflow uniformity and particle cleanliness levels, which CFD predicts spatially.

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

Turbulent fluctuations are inherently random physical phenomena (aleatory uncertainty), while discretization, iterative, and round-off errors are reducible with better numerics.

(CPCE) Certified Professional CFD Engineer Practice Test

(CPCE) Certified Professional CFD Engineer Practice Test

CPCE Industry Standards & Application in Engineering Design 5