Canadian Red Cross BLS Practice Test 2026 – Complete Exam Prep

The correct answer is that chest compressions during CPR for adults should be at least 2 inches deep. This depth is necessary to provide adequate compression of the heart, which allows for effective blood flow and circulation during a cardiac arrest. When compressions are performed at this depth, it ensures that enough pressure is exerted on the heart to facilitate the return of blood to vital organs, enhancing the chances of survival.

Compressions that are too shallow, such as those that would be less than 2 inches, may not appropriately compress the heart and can lead to insufficient blood flow. The depth standard is also aimed at ensuring that compressions achieve a balance between being effective while minimizing the risk of injury to the person receiving CPR.

Compressions deeper than 2 inches, while still beneficial, can potentially increase the risk of injuries to the chest and internal organs, so staying within the recommended range is essential for safety and effectiveness.