BLS MCQs – Set 5
41. What is the most appropriate action for a lone rescuer who finds an unresponsive adult without breathing or a pulse?
A. Give two rescue breaths, then call for help
B. Start CPR beginning with compressions
C. Check for injuries
D. Look for a medical ID
✅ Answer: B. Start CPR beginning with compressions
42. What should you do immediately after delivering a shock with an AED?
A. Wait for further analysis
B. Check the pulse
C. Resume chest compressions immediately
D. Give rescue breaths
✅ Answer: C. Resume chest compressions immediately
43. In adult CPR, how long should each rescue breath be delivered over?
A. 1 second
B. 2 seconds
C. 3 seconds
D. As fast as possible
✅ Answer: A. 1 second
44. Which of the following is a universal step for operating an AED?
A. Look for medical alerts
B. Remove all clothing
C. Apply pads to bare chest and follow prompts
D. Deliver a manual shock
✅ Answer: C. Apply pads to bare chest and follow prompts
45. Which of the following statements about chest recoil is true?
A. Allow full recoil between compressions
B. Recoil is not necessary during rapid compressions
C. Recoil only matters for infants
D. Maintain pressure on the chest for better rhythm
✅ Answer: A. Allow full recoil between compressions
46. What is the minimum number of rescuers needed for effective 2-rescuer CPR?
A. 1
B. 2
C. 3
D. 4
✅ Answer: B. 2
47. What is the purpose of allowing complete chest recoil during CPR?
A. Prevent injury
B. Minimize fatigue
C. Allow the heart to refill with blood
D. Maximize rescue breath efficiency
✅ Answer: C. Allow the heart to refill with blood
48. What should you do if the AED detects no shockable rhythm?
A. Deliver a manual shock
B. Wait for EMS
C. Resume CPR immediately
D. Turn off the AED
✅ Answer: C. Resume CPR immediately
49. What is one advantage of using a barrier device during rescue breathing?
A. Prevents air from escaping
B. Improves compression effectiveness
C. Reduces risk of infection transmission
D. Allows for faster breaths
✅ Answer: C. Reduces risk of infection transmission
50. A child is unresponsive, not breathing, and has a weak pulse of 50/min. What is the correct action?
A. Give rescue breaths only
B. Begin chest compressions
C. Recheck pulse every 5 minutes
D. Give abdominal thrusts
✅ Answer: B. Begin chest compressions
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