Confined Spaces and Dangerous Atmospheres
Avoiding entry, atmosphere and process isolation, permit control, monitoring, communication and rescue.
How to prepare for the CITB MAP test
Build manager-level decisions around role, prevention, coordination, verification and learning rather than memorising isolated site rules.
Core concepts
Concept 1
Confined-space entry is avoided where possible and assessed for specified risks including fire, explosion, loss of consciousness, drowning or asphyxiation.
Exam cue: Ask whether the work can be done remotely or from outside.
Concept 2
Safe systems address isolation, cleaning or purging, ventilation, atmosphere testing, access, competence, communication and supervision.
Exam cue: Test the atmosphere at appropriate locations and continuously where conditions can change.
Concept 3
Emergency rescue is planned with suitable people and equipment and does not rely on the public fire and rescue service as the only arrangement.
Exam cue: Isolate every energy, material and flow path that can affect the space.
Risk pitfalls and guardrails
Entering to rescue a colleague without protection and a planned method.
Guardrail: Do not solve a design, engineering or organisational failure only with a briefing, warning sign or PPE.
Relying on one pre-entry gas reading.
Guardrail: Do not solve a design, engineering or organisational failure only with a briefing, warning sign or PPE.
Calling an enclosed area safe because the hatch is open.
Guardrail: Do not solve a design, engineering or organisational failure only with a briefing, warning sign or PPE.
Memory anchors
Avoid Entry
Change the method so work is completed from outside where reasonably practicable.
Isolate Every Source
Control energy, liquids, gases, solids, machinery and process connections.
Test the Atmosphere
Use suitable equipment and competent interpretation before and during entry.
Ventilate Deliberately
Supply or extract air without creating another hazard.
Permit Controls Entry
Define people, conditions, isolations, monitoring, time and handback.
Rescue Is Pre-Planned
Provide trained rescuers, equipment, communication and casualty recovery.
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
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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