NEBOSH PSM CORRECT FINALS ANSWERS AND
QUESTIONS SET A+
Immediate cause - ✔✔The unsafe act or unsafe condition that leads directly to the
consequences
✔✔Root cause - ✔✔An underlying circumstance that allowed the unsafe condition to
exist
✔✔Leading indicators - ✔✔Proactive measurements of conditions that monitor process
safety before something goes wrong and to see if things are operating as intended
✔✔Lagging indicators - ✔✔Reactive measures that look at failures, such as the number
of injuries, the number of near misses etc
✔✔Auditing - ✔✔Systematic, objective critical evaluation of how well an organisation's
management system is performing by examining evidence
✔✔Hazard - ✔✔Something that has the potential to cause harm
✔✔Risk - ✔✔Likelihood that a hazard will cause harm, in combination with the severity
✔✔Acronym: Failure Mode Effect Analysis - ✔✔Acronym: FMEA
✔✔Risk Priority Number (RPN) equation - ✔✔Severity x Occurrence x Detection
✔✔Severity X Occurrence X Detection - ✔✔Risk Priority Number (RPN) equation
✔✔HAZID - ✔✔A structured, team-based approach to identify hazards, potential
consequences and requirements for risk reduction
✔✔HAZID characteristics - ✔✔top-down, consequence driven study
, ✔✔top-down, consequence driven study - ✔✔Is HAZID bottom up or top down?
✔✔HAZOP - ✔✔A very thorough analysis of a process to identify ways in which the
process could deviate from its design intention
✔✔HAZOP characteristics - ✔✔Bottom up, cause driven study
✔✔Bottom up, cause driven study - ✔✔Is HAZOP top down or bottom up?
✔✔Event Tree Analysis - ✔✔Tool used to evaluate the mitigation measures that will
operate after an event
✔✔Hierarchy of risk controls - ✔✔Inherent safety; elimination; substitution; engineering
controls; administrative controls
✔✔Inherent safety; elimination; substitution; engineering controls; administrative
controls - ✔✔Order the following into hierarchy of risk controls: [administrative controls;
elimination; engineering controls; inherent safety; substitution]
✔✔Double block and bleed - ✔✔The process of isolating a chemical or process line by
closing and locking, or tagging two inline valves and opening a drain/vent line between
them.
✔✔Purpose: double block and bleed - ✔✔Process to ensure any leaks occuring during
maintenance are to a safe location, and not the open end of the line where work is
carried out.
✔✔Asset - ✔✔An item of equipment or an area of production plant
✔✔Asset integrity - ✔✔The ability of the equipment to operate as intended effectively
and efficiently over its entire lifespan
✔✔ATEX - ✔✔Two EU directives that control explosive atmosphere
✔✔symbol for ATEX-approved equipment - ✔✔symbol: εx
✔✔symbol: εx - ✔✔symbol for ATEX-approved equipment
✔✔ATEX-approved equipment - ✔✔equipment that is suitable for use in an explosive
atmosphere
✔✔Design; Procurement, construction, installation and testing; Commissioning;
Operations; Modifications; Decommissioning - ✔✔Order the following asset integrity
QUESTIONS SET A+
Immediate cause - ✔✔The unsafe act or unsafe condition that leads directly to the
consequences
✔✔Root cause - ✔✔An underlying circumstance that allowed the unsafe condition to
exist
✔✔Leading indicators - ✔✔Proactive measurements of conditions that monitor process
safety before something goes wrong and to see if things are operating as intended
✔✔Lagging indicators - ✔✔Reactive measures that look at failures, such as the number
of injuries, the number of near misses etc
✔✔Auditing - ✔✔Systematic, objective critical evaluation of how well an organisation's
management system is performing by examining evidence
✔✔Hazard - ✔✔Something that has the potential to cause harm
✔✔Risk - ✔✔Likelihood that a hazard will cause harm, in combination with the severity
✔✔Acronym: Failure Mode Effect Analysis - ✔✔Acronym: FMEA
✔✔Risk Priority Number (RPN) equation - ✔✔Severity x Occurrence x Detection
✔✔Severity X Occurrence X Detection - ✔✔Risk Priority Number (RPN) equation
✔✔HAZID - ✔✔A structured, team-based approach to identify hazards, potential
consequences and requirements for risk reduction
✔✔HAZID characteristics - ✔✔top-down, consequence driven study
, ✔✔top-down, consequence driven study - ✔✔Is HAZID bottom up or top down?
✔✔HAZOP - ✔✔A very thorough analysis of a process to identify ways in which the
process could deviate from its design intention
✔✔HAZOP characteristics - ✔✔Bottom up, cause driven study
✔✔Bottom up, cause driven study - ✔✔Is HAZOP top down or bottom up?
✔✔Event Tree Analysis - ✔✔Tool used to evaluate the mitigation measures that will
operate after an event
✔✔Hierarchy of risk controls - ✔✔Inherent safety; elimination; substitution; engineering
controls; administrative controls
✔✔Inherent safety; elimination; substitution; engineering controls; administrative
controls - ✔✔Order the following into hierarchy of risk controls: [administrative controls;
elimination; engineering controls; inherent safety; substitution]
✔✔Double block and bleed - ✔✔The process of isolating a chemical or process line by
closing and locking, or tagging two inline valves and opening a drain/vent line between
them.
✔✔Purpose: double block and bleed - ✔✔Process to ensure any leaks occuring during
maintenance are to a safe location, and not the open end of the line where work is
carried out.
✔✔Asset - ✔✔An item of equipment or an area of production plant
✔✔Asset integrity - ✔✔The ability of the equipment to operate as intended effectively
and efficiently over its entire lifespan
✔✔ATEX - ✔✔Two EU directives that control explosive atmosphere
✔✔symbol for ATEX-approved equipment - ✔✔symbol: εx
✔✔symbol: εx - ✔✔symbol for ATEX-approved equipment
✔✔ATEX-approved equipment - ✔✔equipment that is suitable for use in an explosive
atmosphere
✔✔Design; Procurement, construction, installation and testing; Commissioning;
Operations; Modifications; Decommissioning - ✔✔Order the following asset integrity
