30 Process Safety Management questions from the Plant Operations bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
Free to start: the 2-minute CH readiness check — six questions and a result.
A.formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
B.large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
C.barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right
D.OSHA 29 CFR 1910.119's fourteen elements including process safety information, PHA, operating procedures, training, MOC, PSSR, mechanical integrity and incident investigation
Answer + AI explanation with Pro
2. Which term means: "OSHA 29 CFR 1910.119's fourteen elements including process safety information, PHA, operating procedures, training, MOC, PSSR, mechanical integrity and incident investigation"?
Junior
A.Management of change
B.Root cause analysis
C.PSM elements
D.Flixborough 1974 lessons
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.PSM elements — Oil Industry Safety Directorate standard for fire protection facilities in petroleum refineries and oil and gas processing plants
B.PSM elements — temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
C.PSM elements — OSHA 29 CFR 1910.119's fourteen elements including process safety information, PHA, operating procedures, training, MOC, PSSR, mechanical integrity and incident investigation
D.PSM elements — leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
Answer + AI explanation with Pro
4. What is Management of change?
Junior
A.large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
B.formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
C.structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
D.OSHA 29 CFR 1910.119's fourteen elements including process safety information, PHA, operating procedures, training, MOC, PSSR, mechanical integrity and incident investigation
Answer + AI explanation with Pro
5. Which term means: "formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation"?
Junior
A.Root cause analysis
B.OISD-118
C.Management of change
D.Process safety KPIs
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
A.Management of change — pre-start-up safety review confirming construction matches design, procedures and training exist and PHA actions are closed before hazardous material is introduced
B.Management of change — structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
C.Management of change — temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
D.Management of change — formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
Answer + AI explanation with Pro
7. What is PSSR?
Junior
A.pre-start-up safety review confirming construction matches design, procedures and training exist and PHA actions are closed before hazardous material is introduced
B.formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
C.structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
D.Oil Industry Safety Directorate standard for fire protection facilities in petroleum refineries and oil and gas processing plants
Answer + AI explanation with Pro
8. Which term means: "pre-start-up safety review confirming construction matches design, procedures and training exist and PHA actions are closed before hazardous material is introduced"?
Junior
A.Bow-tie diagram
B.OISD-116
C.PSSR
D.Root cause analysis
Answer + AI explanation with Pro
9. Which statement is correct?
Junior
A.PSSR — formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
B.PSSR — pre-start-up safety review confirming construction matches design, procedures and training exist and PHA actions are closed before hazardous material is introduced
C.PSSR — Oil Industry Safety Directorate standard for fire protection facilities in petroleum refineries and oil and gas processing plants
D.PSSR — standard fixing inter-unit and inter-equipment layout distances in oil and gas installations, including tank dyke and unit spacing
Answer + AI explanation with Pro
10. What is Root cause analysis?
Mid
A.OSHA 29 CFR 1910.119's fourteen elements including process safety information, PHA, operating procedures, training, MOC, PSSR, mechanical integrity and incident investigation
B.structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
C.leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
D.temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
Answer + AI explanation with Pro
11. Which term means: "structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure"?
Mid
A.OISD-118
B.Root cause analysis
C.PSM elements
D.Process safety KPIs
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
A.Root cause analysis — structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
B.Root cause analysis — formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
C.Root cause analysis — large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
D.Root cause analysis — pre-start-up safety review confirming construction matches design, procedures and training exist and PHA actions are closed before hazardous material is introduced
Answer + AI explanation with Pro
13. What is Bow-tie diagram?
Mid
A.OSHA 29 CFR 1910.119's fourteen elements including process safety information, PHA, operating procedures, training, MOC, PSSR, mechanical integrity and incident investigation
B.large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
C.temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
D.barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right
Answer + AI explanation with Pro
14. Which term means: "barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right"?
Mid
A.Flixborough 1974 lessons
B.OISD-116
C.Bow-tie diagram
D.OISD-118
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
A.Bow-tie diagram — leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
B.Bow-tie diagram — standard fixing inter-unit and inter-equipment layout distances in oil and gas installations, including tank dyke and unit spacing
C.Bow-tie diagram — barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right
D.Bow-tie diagram — large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
Answer + AI explanation with Pro
16. What is OISD-116?
Mid
A.Oil Industry Safety Directorate standard for fire protection facilities in petroleum refineries and oil and gas processing plants
B.temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
C.large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
D.leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
Answer + AI explanation with Pro
17. Which term means: "Oil Industry Safety Directorate standard for fire protection facilities in petroleum refineries and oil and gas processing plants"?
Mid
A.PSSR
B.Bow-tie diagram
C.OISD-118
D.OISD-116
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
A.OISD-116 — Oil Industry Safety Directorate standard for fire protection facilities in petroleum refineries and oil and gas processing plants
B.OISD-116 — pre-start-up safety review confirming construction matches design, procedures and training exist and PHA actions are closed before hazardous material is introduced
C.OISD-116 — temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
D.OISD-116 — leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
Answer + AI explanation with Pro
19. What is OISD-118?
Mid
A.leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
B.barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right
C.temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
D.standard fixing inter-unit and inter-equipment layout distances in oil and gas installations, including tank dyke and unit spacing
Answer + AI explanation with Pro
20. Which term means: "standard fixing inter-unit and inter-equipment layout distances in oil and gas installations, including tank dyke and unit spacing"?
Mid
A.Flixborough 1974 lessons
B.OISD-116
C.OISD-118
D.Root cause analysis
Answer + AI explanation with Pro
21. Which statement is correct?
Mid
A.OISD-118 — standard fixing inter-unit and inter-equipment layout distances in oil and gas installations, including tank dyke and unit spacing
B.OISD-118 — OSHA 29 CFR 1910.119's fourteen elements including process safety information, PHA, operating procedures, training, MOC, PSSR, mechanical integrity and incident investigation
C.OISD-118 — barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right
D.OISD-118 — structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
Answer + AI explanation with Pro
22. What is Process safety KPIs?
Mid
A.standard fixing inter-unit and inter-equipment layout distances in oil and gas installations, including tank dyke and unit spacing
B.large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
C.temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
D.leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
Answer + AI explanation with Pro
23. Which term means: "leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754"?
Mid
A.PSM elements
B.OISD-118
C.Root cause analysis
D.Process safety KPIs
Answer + AI explanation with Pro
24. Which statement is correct?
Mid
A.Process safety KPIs — standard fixing inter-unit and inter-equipment layout distances in oil and gas installations, including tank dyke and unit spacing
B.Process safety KPIs — barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right
C.Process safety KPIs — leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
D.Process safety KPIs — temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
Answer + AI explanation with Pro
25. What is Bhopal 1984 lessons?
Senior
A.formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
B.large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
C.pre-start-up safety review confirming construction matches design, procedures and training exist and PHA actions are closed before hazardous material is introduced
D.structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
Answer + AI explanation with Pro
26. Which term means: "large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide"?
Senior
A.Bow-tie diagram
B.OISD-116
C.Bhopal 1984 lessons
D.Process safety KPIs
Answer + AI explanation with Pro
27. Which statement is correct?
Senior
A.Bhopal 1984 lessons — leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
B.Bhopal 1984 lessons — large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
C.Bhopal 1984 lessons — barrier model with the top event in the centre, threats and preventive barriers on the left, consequences and mitigation barriers on the right
D.Bhopal 1984 lessons — temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
Answer + AI explanation with Pro
28. What is Flixborough 1974 lessons?
Senior
A.formal review and approval of any change to chemicals, equipment, procedures or organisation that is not replacement in kind, before implementation
B.structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
C.leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
D.temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
Answer + AI explanation with Pro
29. Which term means: "temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change"?
Senior
A.Flixborough 1974 lessons
B.PSSR
C.Management of change
D.Bhopal 1984 lessons
Answer + AI explanation with Pro
30. Which statement is correct?
Senior
A.Flixborough 1974 lessons — large MIC inventory, disabled refrigeration, scrubber and flare, and weak MOC drove inventory reduction and inherently safer design worldwide
B.Flixborough 1974 lessons — structured investigation by 5-Whys, fishbone, TapRooT or fault tree that goes past the immediate cause to the management-system failure
C.Flixborough 1974 lessons — temporary bypass pipe between cyclohexane reactors installed without engineering review caused a vapour cloud explosion, the origin of formal management of change
D.Flixborough 1974 lessons — leading indicators such as overdue inspections, MOC backlog and safeguard bypasses, plus lagging Tier 1 and Tier 2 loss-of-containment events under API 754
Answer + AI explanation with Pro
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