Ignition Sources, Fire Load and Arson
Accidental and deliberate ignition, combustible contents, oxygen sources, fire load and arson vulnerability.
How to prepare for both units
Learn the principle, locate scenario or workplace evidence, explain why it matters, recommend proportionate control and show how action will be owned and reviewed.
Core concepts
Concept 1
electrical, thermal, mechanical and chemical ignition sources
Exam cue: Inspect normal work, maintenance, breakdown, contractor work and foreseeable misuse.
Concept 2
smoking, hot surfaces, static and hot work
Exam cue: Evaluate how quantity, arrangement, housekeeping and security change likelihood and severity.
Concept 3
combustible contents, waste and total fire load
Concept 4
access, concealment and other arson vulnerability factors
Risk pitfalls and guardrails
Using a generic checklist without examining non-routine work.
Guardrail: Do not answer with unsupported lists, invent a single UK legal regime, confuse the 24-hour FSC1 window with working time, treat the FSC2 three-hour recommendation as a limit or present internal allocations as NEBOSH weights.
Counting combustible items without considering quantity, distribution or energy content.
Guardrail: Do not answer with unsupported lists, invent a single UK legal regime, confuse the 24-hour FSC1 window with working time, treat the FSC2 three-hour recommendation as a limit or present internal allocations as NEBOSH weights.
Memory anchors
Inspect beyond normal production
Maintenance, charging, hot work and contractors can introduce different ignition sources.
Fire load predicts severity
The amount and energy content of combustible material influence potential fire size.
Waste joins fuel and access
Poorly located combustible waste can feed fire and attract deliberate ignition.
Static can ignite vapour
Charge accumulation and discharge must be considered where flammable atmospheres may form.
Arson has conditions
Access, concealment, available fuel and weak security increase deliberate-fire likelihood.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A portable heater is placed against stacked cardboard. Which part of the fire risk should be controlled first?
Why can overloaded electrical adaptors be a fire hazard?
Solvent-soaked cloths are left in a warm, open bin. What ignition mechanism should be considered?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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