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IEC 61508 - Quiz
Contributed by: Fry
  • 1. Which standard is an adaptation of IEC 61508 for automotive electric/electronic systems?
A) IEC 62061
B) IEC 61511
C) IEC 62279
D) ISO 26262
  • 2. What does MISRA stand for in the context of automotive software reliability?
A) Mobile Instrumentation Software Reliability Association
B) Manufacturing Industry Safety Reliability Association
C) Motor Industry Software Reliability Association
D) Motorized Integrated System Reliability Association
  • 3. When was the first set of guidelines for the development of vehicle-based software published by MISRA?
A) November 1994
B) January 1990
C) December 1998
D) November 2000
  • 4. What is the primary association of MISRA today?
A) Railway signaling protocols
B) Guidelines on using C and C++ languages
C) Manufacturing process automation
D) Nuclear power plant instrumentation
  • 5. Which standard provides a specific interpretation of IEC 61508 for railway applications?
A) IEC 62061
B) IEC 61511
C) IEC 62279
D) IEC 61513
  • 6. What are the equivalent CENELEC standards for IEC 62279?
A) EN 62061 and EN 61513
B) EN 50262 and EN 50279
C) EN 61508 and EN 61511
D) EN 50128 and EN 50657
  • 7. Which standard sets out practices in the engineering of systems for the safety of industrial processes through instrumentation?
A) IEC 62279
B) IEC 61511
C) ISO 26262
D) IEC 62061
  • 8. Which standard is specifically used for the instrumentation and control of nuclear power plant safety systems?
A) IEC 61511
B) ISO 26262
C) IEC 61513
D) IEC 62061
  • 9. What is the machinery-specific implementation of IEC 61508?
A) IEC 61513
B) IEC 61511
C) IEC 62279
D) IEC 62061
  • 10. Who publishes the overview list of safety norms specific for nuclear power plants?
A) IEC
B) ISO
C) CENELEC
D) MISRA
  • 11. What is MISRA C considered to be in the majority of safety-related industries?
A) The de facto standard for embedded C programming
B) A voluntary recommendation for hardware design
C) An outdated set of guidelines
D) The primary language for railway signaling
  • 12. Which of the following is listed as a sector under 'Process industries'?
A) Petrochemical
B) Automotive manufacturing
C) Railway signaling
D) Machinery assembly
  • 13. IEC 62061 applies to the design of which type of systems?
A) Automotive engine control units
B) Nuclear reactor cooling systems
C) Machinery safety-related electrical control systems
D) Railway track switching systems
  • 14. What does SIL stand for in the context of IEC 61508?
A) Safety implementation level
B) System integrity level
C) System improvement level
D) Safety integrity level
  • 15. How many measures are used to evaluate the achieved SIL of a design?
A) Five
B) Two
C) Four
D) Three
  • 16. What is the primary definition of Systematic Capability (SC)?
A) A measure of software speed
B) A measure of hardware cost
C) A measure of design quality
D) A measure of physical durability
  • 17. What limits the SIL of a safety function regarding its devices?
A) The highest SC rating of the devices used
B) The smallest SC rating of the devices used
C) The total sum of all device SC ratings
D) The average SC rating of all devices
  • 18. How is high demand defined in IEC 61508?
A) Once per year
B) More than once per year
C) Less than once per year
D) Twice per decade
  • 19. How is low demand defined in IEC 61508?
A) More than once per year
B) Exactly ten times per year
C) Less than or equal to once per year
D) More than twice per year
  • 20. What does SIL specify for functions that operate in high demand mode?
A) Allowable frequency of dangerous failure
B) Allowable response latency
C) Allowable number of user interactions
D) Allowable probability of demand failure
  • 21. What is the role of a Certification Body (CB)?
A) To attest that a product meets certification requirements
B) To write the original IEC 61508 standard
C) To act as the national government regulator
D) To manufacture safety-certified products
  • 22. What ensures global recognition of accredited Certification Bodies?
A) The IEC central office stamp
B) International Patent Law
C) Multilateral Recognition Arrangement (MLA)
D) Direct government mandates
  • 23. What is the document containing specific certification requirements called?
A) Certification scheme
B) Safety charter
C) Auditor guide
D) Compliance manual
  • 24. Which of the following is an example of an organization that offers IEC 61508 certification?
A) ILAC
B) ISO
C) TÜV Rheinland
D) IAF
  • 25. How many parts does the IEC 61508 standard have?
A) 3
B) 10
C) 16
D) 7
  • 26. Which parts of IEC 61508 are considered informative guidelines?
A) Part 4
B) Parts 14–16
C) Parts 5–7
D) Parts 1–3
  • 27. What is the total number of phases in the safety life cycle?
A) 5
B) 16
C) 3
D) 7
  • 28. How are the safety life cycle phases grouped in terms of operation?
A) Phases 14–16
B) Phases 6–13
C) Phases 1–5
D) Phases 1–16
  • 29. What is the stance of IEC 61508 regarding 'zero risk'?
A) Zero risk is only required for high-hazard industries
B) Zero risk can never be reached
C) Zero risk is achievable through perfect design
D) Zero risk is the primary objective of the standard
  • 30. What does the ALARP principle in IEC 61508 imply?
A) Non-tolerable risks must be reduced
B) All risks must be eliminated regardless of cost
C) Risk reduction is optional for small systems
D) Risks are only evaluated at the design phase
  • 31. In the context of the risk matrix, what does Class I signify?
A) Tolerable if cost of reduction exceeds improvement
B) Unacceptable in any circumstance
C) Acceptable as it stands
D) Undesirable but potentially tolerable
  • 32. What is the primary focus of Part 3 of IEC 61508?
A) Operational maintenance procedures
B) General definitions
C) Programmable electronics
D) Mechanical devices
  • 33. When was the second edition of IEC 61508 published?
A) 2010
B) 1998
C) 2005
D) 2000
  • 34. Which phases of the safety life cycle address realisation?
A) Phases 14–16
B) Phases 1–5
C) Phases 1–7
D) Phases 6–13
  • 35. Which part of IEC 61508 contains standard definitions?
A) Part 7
B) Part 3
C) Part 4
D) Part 1
  • 36. What coverage criterion is used in higher SIL level applications instead of simple branch coverage?
A) Object coverage
B) Statement coverage
C) Line coverage
D) MC/DC
  • 37. What tool is needed to obtain MC/DC coverage information?
A) A Unit Testing tool
B) A compiler only
C) A network analyzer
D) A word processor
  • 38. Which industry is DO-178C associated with according to the text?
A) Mining
B) Household appliances
C) Aerospace
D) Automotive
  • 39. Who authored the book 'SIL and Functional Safety in a Nutshell'?
A) C. O'Brien
B) D. Smith
C) W. Goble
D) M.J.M. Houtermans
  • 40. What is the page count of the book 'Functional Safety for the Mining Industry'?
A) 40 pages
B) 430 pages
C) 458 pages
D) 150 pages
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