Control Measures
Elimination, substitution, enclosure, local exhaust ventilation, procedural controls, PPE, monitoring and maintenance.
How to prepare for GNC1 and GNC2
Learn the principle, locate workplace evidence, explain the risk or duty, select proportionate controls and show how action will be owned and reviewed.
Core concepts
Concept 1
Elimination, substitution, enclosure, local exhaust ventilation, procedural controls, PPE, monitoring and maintenance.
Exam cue: Identify the workplace evidence, people exposed, hazard mechanism and applicable duty before selecting a control.
Concept 2
Control at source and along the exposure path before relying on PPE, then verify performance.
Exam cue: Prefer elimination and engineered or collective protection before procedural controls and PPE, then verify effectiveness.
Concept 3
LEV is not effective merely because it is installed; capture, use, maintenance and examination matter.
Risk pitfalls and guardrails
Giving a generic hazard or control list without connecting it to the task, people and workplace conditions.
Guardrail: Do not give a generic control list without linking it to the task, people, environment, owner and verification method.
Treating a document, certificate, inspection or item of PPE as proof that the underlying risk is controlled.
Guardrail: Do not give a generic control list without linking it to the task, people, environment, owner and verification method.
Memory anchors
GNC 7.4 · Control Measures
Elimination, substitution, enclosure, local exhaust ventilation, procedural controls, PPE, monitoring and maintenance.
Control Measures · decision cue
Control at source and along the exposure path before relying on PPE, then verify performance.
Control Measures · evidence check
LEV is not effective merely because it is installed; capture, use, maintenance and examination matter.
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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