Safety-Related Systems CTAL-TTA Practice Questions (Page 4)

Questions 16–20

1. 16foundation · medium

   What is the purpose of failure mode analysis in safety-related systems?

   • ATo measure the performance of the system under normal conditions.
   • BTo document the successful execution of test cases.
   • CTo identify potential failure modes and analyze their effects on system safety.
   • DTo verify that the system meets its functional requirements.
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2. 17expert · hard

   A team performs an FMEA on a chemical plant control system. They identify a failure mode where a sensor reading is corrupted, causing the controller to open a relief valve unnecessarily. The team rates severity as high, occurrence as medium, and detectability as low. The test manager proposes adding more test cases for the normal operation path. What is the most appropriate response from the Technical Test Analyst?

   • ADefer testing until the sensor hardware is replaced with a more reliable model.
   • BPropose removing the normal path tests to focus all effort on the failure mode.
   • CAgree, because testing the normal path is the most efficient way to find sensor corruption faults.
   • DPropose adding test cases that specifically inject corrupted sensor values and verify the controller's response.
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4. 18foundation · medium

   What is a key expectation for documentation and test reports in safety-related systems?

   • AThey must provide sufficient evidence to demonstrate that the system meets its safety requirements.
   • BThey must be approved by an external certification body before testing begins.
   • CThey must include the names of all testers and their qualifications.
   • DThey must be written in a formal language such as Z or VDM.
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5. 19foundation · medium

   What is the primary purpose of IEC 61508 in the context of safety-related systems?

   • AIt defines quality management principles for software development.
   • BIt provides a generic framework for the functional safety of electrical, electronic, and programmable electronic systems.
   • CIt provides guidelines for the usability of user interfaces.
   • DIt specifies requirements for the security of information systems.
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6. 20application · medium

   A Technical Test Analyst is assigned to a project developing an electronic steering system for a passenger vehicle. The system is classified as ASIL D. Which standard and testing requirement combination is most relevant?

   • AIEC 61508 with ASIL D requirements, including statement coverage.
   • BIEC 61508 with SIL 4 requirements, including MC/DC coverage.
   • CISO 26262 with ASIL D requirements, including MC/DC coverage.
   • DISO 26262 with SIL 4 requirements, including branch coverage.
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