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BLS Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the first step in the Chain of Survival for adults?✔✔ Immediate recognition and activation of emergency response.
What is the purpose of the recovery position?✔✔ To maintain an open airway in an unresponsive victim who is breathing normally.
When should you stop CPR?✔✔ When EMS arrives and takes over, the victim starts breathing normally, or the scene becomes unsafe.
What should you do if a victim vomits during CPR?✔✔ Turn them to the side, clear the airway, then resume CPR.
Why is full chest recoil important during compressions?✔✔ It allows the heart to refill with blood between compressions.
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What is the correct ventilation rate for an adult with a pulse but no breathing?✔✔ 1 breath every 5–6 seconds (about 10–12 breaths per minute).
What is the first action you should take when you encounter an unresponsive adult?✔✔ Activate the emergency response system (call 911/get an AED) before starting CPR.
How deep should chest compressions be when performing CPR on an adult?✔✔ Compress at least 2 inches (5 cm) but no more than 2.4 inches (6 cm).
What is the correct hand placement for adult chest compressions?✔✔ Place the heel of one hand in the center of the chest (lower half of the sternum), with the other hand on top.
How do you check for breathing in an unresponsive victim?✔✔ Look, listen, and feel for no more than 10 seconds while scanning for normal or abnormal breaths.
What should you do if a victim is gasping but unresponsive? 2 / 3
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✔✔ Treat it as cardiac arrest and begin CPR immediately—agonal gasps are not normal breathing.
What is the recommended compression rate for high-quality CPR?✔✔ 100 to 120 compressions per minute.
How do you open the airway of an unresponsive victim?✔✔ Use the head-tilt, chin-lift maneuver (unless a spinal injury is suspected).
What is the compression-to-ventilation ratio for single-rescuer adult CPR?✔✔ 30 compressions to 2 ventilations.
When should you switch rescuers during CPR?✔✔ Every 2 minutes or sooner if the compressor is fatigued.
What is the most critical component of high-quality CPR?✔✔ Minimizing interruptions in chest compressions.
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