The post AutoQuiz: How to Detect a Fault in a Safety System first appeared on the ISA Interchange blog site.
Today’s automation industry quiz question comes from the ISA Certified Automation Professional certification program. ISA CAP certification provides a non-biased, third-party, objective assessment and confirmation of an automation professional’s skills. The CAP exam is focused on direction, definition, design, development/application, deployment, documentation, and support of systems, software, and equipment used in control systems, manufacturing information systems, systems integration, and operational consulting. Click this link for information about the CAP program. The following question comes from the CAP study guide, Performance Domain VI, Operations and Maintenance. Long-term support of the system.
Which of the following MUST be performed to reveal a normally undetected fault in a safety system?
b) proof test
c) system software test
d) system validation
e) none of the above
A proof test on a system may reveal faults that would otherwise not be mentioned by internal diagnostic measures and is therefore correct.
Proven-in-use is an assessment on suitability for use and not related to fault detection.
A system software test relates only to software and not to system faults.
System validation takes place to test requirements and specifications and may not reveal faults, which have not been refined by the requirements.
The correct answer is B, proof test.
Source: ISA News