NEBOSH Incident Investigation 2

Question 1

What are the key steps in a systematic accident investigation process?

Accepted Answer

Secure the scene, gather evidence (physical, documentary, witness), analyse causes (immediate and root), identify corrective actions, produce a report, and follow up on implementation

Answer

A systematic investigation follows a structured process: first preserving the scene and evidence, then gathering all types of evidence (physical conditions, documents, witness accounts), analysing immediate and underlying causes, identifying both corrective and preventive actions, documenting findings in a report, and crucially following up to ensure actions are implemented.

Question 2

Under RIDDOR 2013, what is the time limit for reporting a death or specified injury to the enforcing authority?

Accepted Answer

Without delay — by the quickest practicable means (phone or online), followed by a written report within 10 days

Answer

Deaths and specified injuries must be reported without delay by the quickest practicable means, which is either by telephone to the HSE's Incident Contact Centre or via the online reporting system. This must be followed by a completed report form (F2508) within 10 days. The urgency reflects the seriousness of these events.

Question 3

What is the difference between corrective and preventive actions in incident investigation?

Accepted Answer

Corrective actions fix the specific problem that caused the incident, while preventive actions address the wider systemic issues to prevent similar incidents elsewhere in the organisation

Answer

Corrective actions directly address the specific cause of the incident that occurred (fixing the broken guard rail, repairing the faulty equipment). Preventive actions go further, addressing broader systemic weaknesses to prevent similar types of incidents from occurring elsewhere (reviewing all guard rails, changing the maintenance programme across the organisation).

Question 4

In the bow-tie model of risk analysis, what do the two sides of the bow-tie represent?

Accepted Answer

Prevention controls (left side, before the event) and mitigation/recovery controls (right side, after the event), with the hazardous event as the central knot

Answer

The bow-tie model places the hazardous event (loss of control) at the centre. The left side shows threats and the prevention barriers that should stop the event from occurring. The right side shows the potential consequences and the mitigation barriers that should limit the severity if the event does occur. It combines fault tree and event tree analysis.

Question 5

Which of the following incidents must be reported under RIDDOR 2013 as a 'dangerous occurrence'?

Accepted Answer

The collapse, overturning or failure of load-bearing parts of a lift or hoist

Answer

The collapse, overturning or failure of load-bearing parts of lifts and hoists is listed as a dangerous occurrence in Schedule 2 of RIDDOR 2013. Dangerous occurrences are specific types of events with high potential for harm that must be reported even if no one was injured. Other examples include scaffold collapse, uncontrolled explosions, and electrical incidents causing fire.

NEBOSH IGC Practice Test

NEBOSH IGC Practice Test

NEBOSH Incident Investigation 2