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NEBOSH HSE PSM Questions and
Answers Latest 2026
Definition of Process Safety Management Ans: A blend of
engineering and management skills focused on
preventing catastrophic accidents and near misses,
particularly structural collapse, explosions, fires and
toxic releases associated with loss of containment of
energy or dangerous substances such as chemicals and
petroleum products.
Sources of Process Safety Management information: Ans:
Safety Data Sheets (SDS)
Process design criteria.
Process Flow Diagrams (PFD)
Standard Operating procedures (SOPs) setting safe limits,
such as for temperatures, pressures, flows, compositions
and levels as well as evaluation of the effects.
Inspection, audit and investigation reports.
Maintenance records.
Piping and Instrument Diagrams (P&Ids).
Process Control Systems, including software integrity.
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Relief system designs.
Fire detection and protection plans.
Management Of Change - MOC Ans: MOC is a
management control approach to make sure that
proposed changes are properly assessed and authorized.
Management Of Change - MOC - Requirements: Ans:
Hazard and Risk Analysis.
Process for all changes to be authorized.
Changes documented.
Consult and inform.
Training.
Workers Consultation Ans: The two-way exchange of
information between parties. In this case, between
employer and worker.
Definition of Competence Ans: A combination of
practical and thinking skills, experience and knowledge.
Elements of a Process Safety Management System Ans:
Element 1: Strong Leadership.
Element 2: Hazard Analysis.
Element 3: Management Of Change.
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Element 4: Operation within design intent.
Element 5: Competence management. (Training).
Element 6: Control of Contractors.
Element 7: Asset Integrity.
Element 8: Emergency Response.
Element 9: Process Safety Incident Investigations.
Element 10: Performance Monitoting and Auditing.
Leading Indicators Ans: Proactive measurements of
conditions that monitor process safety before something
goes wrong and to see if things are operating as intended.
Lagging Indicators Ans: Reactive measures that took at
failures, such as the number of injuries, the number of
near misses and the number of spills that are reported,
or excursions where plant is operated outside the
intended operational envelope.
Five Steps for Risk Assessment Ans: Step 1: Identify the
hazards.
Step 2: Identify the people who might be harmed and
how.
Step 3: Evaluate the risk and decide on precautions.
Step 4: Record the significant findings.
© 2025 All rights reserved
NEBOSH HSE PSM Questions and
Answers Latest 2026
Definition of Process Safety Management Ans: A blend of
engineering and management skills focused on
preventing catastrophic accidents and near misses,
particularly structural collapse, explosions, fires and
toxic releases associated with loss of containment of
energy or dangerous substances such as chemicals and
petroleum products.
Sources of Process Safety Management information: Ans:
Safety Data Sheets (SDS)
Process design criteria.
Process Flow Diagrams (PFD)
Standard Operating procedures (SOPs) setting safe limits,
such as for temperatures, pressures, flows, compositions
and levels as well as evaluation of the effects.
Inspection, audit and investigation reports.
Maintenance records.
Piping and Instrument Diagrams (P&Ids).
Process Control Systems, including software integrity.
© 2025 All rights reserved
, 2 | Page
Relief system designs.
Fire detection and protection plans.
Management Of Change - MOC Ans: MOC is a
management control approach to make sure that
proposed changes are properly assessed and authorized.
Management Of Change - MOC - Requirements: Ans:
Hazard and Risk Analysis.
Process for all changes to be authorized.
Changes documented.
Consult and inform.
Training.
Workers Consultation Ans: The two-way exchange of
information between parties. In this case, between
employer and worker.
Definition of Competence Ans: A combination of
practical and thinking skills, experience and knowledge.
Elements of a Process Safety Management System Ans:
Element 1: Strong Leadership.
Element 2: Hazard Analysis.
Element 3: Management Of Change.
© 2025 All rights reserved
, 3 | Page
Element 4: Operation within design intent.
Element 5: Competence management. (Training).
Element 6: Control of Contractors.
Element 7: Asset Integrity.
Element 8: Emergency Response.
Element 9: Process Safety Incident Investigations.
Element 10: Performance Monitoting and Auditing.
Leading Indicators Ans: Proactive measurements of
conditions that monitor process safety before something
goes wrong and to see if things are operating as intended.
Lagging Indicators Ans: Reactive measures that took at
failures, such as the number of injuries, the number of
near misses and the number of spills that are reported,
or excursions where plant is operated outside the
intended operational envelope.
Five Steps for Risk Assessment Ans: Step 1: Identify the
hazards.
Step 2: Identify the people who might be harmed and
how.
Step 3: Evaluate the risk and decide on precautions.
Step 4: Record the significant findings.
© 2025 All rights reserved
