Question:
Consider the following accident scenario: Failure of a drain connection on a rich oil line at the base of an absorber tower in a gas producing plant allowed the release of rich oil and gas. The resulting vapor cloud ignited from the ignition system of an engine-driven recompressor. The absorber tower eventually collapsed across a pipe rack. The breakage of the pipelines added more fuel to the fire and led to the total destruction of the plant. The resulting fire burnt for 3 days.
Consider the following accident scenario: Failure of a drain connection on a rich oil line at the base of an absorber tower in a gas producing plant allowed the release of rich oil and gas. The resulting vapor cloud ignited from the ignition system of an engine-driven recompressor. The absorber tower eventually collapsed across a pipe rack. The breakage of the pipelines added more fuel to the fire and led to the total destruction of the plant. The resulting fire burnt for 3 days.
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Accident analysis follows three stages: initiation (trigger), propagation (spread of hazard), and termination (end of hazardous event).
Updated On: Aug 30, 2025
- P-I; Q-III; R-II
- P-II; Q-I; R-III
- P-II; Q-III; R-I
- P-I; Q-II; R-III
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The Correct Option is B
Solution and Explanation
- Initiation: The accident begins with the failure of the drain connection which allows the escape of oil and gas. Hence, (P) corresponds to (II).
- Propagation: After the leak, the escaped hydrocarbons form a vapor cloud which ignites and propagates the fire. Hence, (Q) corresponds to (I).
- Termination: The fire eventually ends after the consumption of all combustible material. Hence, (R) corresponds to (III).
- Therefore, the correct sequence is: P-II, Q-I, R-III.
- Propagation: After the leak, the escaped hydrocarbons form a vapor cloud which ignites and propagates the fire. Hence, (Q) corresponds to (I).
- Termination: The fire eventually ends after the consumption of all combustible material. Hence, (R) corresponds to (III).
- Therefore, the correct sequence is: P-II, Q-I, R-III.
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