Safety, Fire & Survival · First Aid
When performing CPR on an adult, the compression-to-ventilation ratio for a single rescuer is:
- A5 compressions to 1 breath
- B15 compressions to 1 breath
- C30 compressions to 2 breaths✓ Correct
- D10 compressions to 5 breaths
Explanation
The standard adult CPR ratio is 30 chest compressions to 2 rescue breaths, with compressions about 2 inches deep at 100–120 per minute. High-quality, minimally interrupted compressions are the priority while help and an AED are obtained.
Authority: STCW A-VI/1 Elementary First Aid (CPR)
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