BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 4)

 BLS MCQs – Set 4

31. What is the correct action when you notice the chest does not rise during rescue breathing?
A. Push harder on the chest
B. Reposition the head and try again
C. Start chest compressions
D. Increase the volume of breaths
✅ Answer: B. Reposition the head and try again

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32. During CPR, when should rescuers switch compressors to prevent fatigue?
A. Every minute
B. Every 5 minutes
C. About every 2 minutes or 5 cycles
D. After each AED shock
✅ Answer: C. About every 2 minutes or 5 cycles

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33. What is the correct ventilation rate for an infant or child with a pulse but no breathing (respiratory arrest)?
A. 1 breath every 10 seconds
B. 1 breath every 6 seconds
C. 1 breath every 3–5 seconds
D. 2 breaths every 30 seconds
✅ Answer: C. 1 breath every 3–5 seconds

34. What is the correct hand placement for chest compressions in a child?
A. Just below the nipple line with two fingers
B. One hand or two hands on the lower half of the sternum
C. Mid-abdomen
D. Upper chest
✅ Answer: B. One hand or two hands on the lower half of the sternum

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35. Which pulse is checked in an infant during BLS?
A. Radial
B. Carotid
C. Brachial
D. Femoral
✅ Answer: C. Brachial

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36. Which of the following describes “agonal gasps”?
A. Normal breathing
B. Shallow but effective breaths
C. Gasping, irregular breaths that are not normal
D. Snoring-type breathing that clears with head tilt
✅ Answer: C. Gasping, irregular breaths that are not normal

37. What is the ideal chest compression fraction during high-quality CPR?
A. 40%
B. 50%
C. 60%
D. At least 80%
✅ Answer: D. At least 80%

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38. What is the maximum time to check for a pulse during BLS?
A. 5 seconds
B. 10 seconds
C. 15 seconds
D. 20 seconds
✅ Answer: B. 10 seconds

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39. What is the primary purpose of defibrillation?
A. Restart the heart
B. Stop the heart from beating
C. Deliver oxygen
D. Eliminate abnormal rhythm (like VF)
✅ Answer: D. Eliminate abnormal rhythm (like VF)

40. What is the best indicator of effective rescue breathing in a child?
A. Chest rise and fall
B. Color change to pink
C. Improved pulse
D. Audible breath sounds
✅ Answer: A. Chest rise and fall