BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 10)

 BLS MCQs – Set 10 (Questions 91–100)

91. What is the recommended rescue breathing rate for a child or infant with a pulse?
A. 1 breath every 2 seconds
B. 1 breath every 6–8 seconds
C. 1 breath every 3–5 seconds
D. 1 breath every 10 seconds
✅ Answer: C. 1 breath every 3–5 seconds

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92. What is the appropriate way to provide chest compressions to an obese adult?
A. Use only one hand
B. Compress over the lower ribs
C. Perform compressions on the center of the chest with both hands
D. Avoid compressions due to risk
✅ Answer: C. Perform compressions on the center of the chest with both hands

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93. What is the proper location to check the pulse in an unconscious infant?
A. Radial
B. Carotid
C. Brachial
D. Femoral
✅ Answer: C. Brachial

94. When should an untrained layperson begin chest compressions?
A. After checking pulse for 10 seconds
B. Immediately after confirming unresponsiveness and no normal breathing
C. Only when AED is ready
D. After rescue breaths
✅ Answer: B. Immediately after confirming unresponsiveness and no normal breathing

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95. Why is minimizing interruptions in compressions important?
A. It allows for oxygenation
B. It maintains perfusion pressure
C. It gives the rescuer time to rest
D. It prevents air leaks
✅ Answer: B. It maintains perfusion pressure

96. What is the most appropriate technique to open the airway of a trauma victim with possible neck injury?
A. Head tilt–chin lift
B. Jaw-thrust maneuver
C. Abdominal thrust
D. Neck extension
✅ Answer: B. Jaw-thrust maneuver

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97. What is a sign of ROSC (Return of Spontaneous Circulation)?
A. Continued gasping
B. Weak peripheral pulses
C. Sudden rise in EtCO₂ (end-tidal CO₂)
D. Muscle twitching
✅ Answer: C. Sudden rise in EtCO₂ (end-tidal CO₂)

98. What is the maximum time you should spend checking for breathing and a pulse?
A. 5 seconds
B. 10 seconds
C. 15 seconds
D. 20 seconds
✅ Answer: B. 10 seconds

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99. What is the appropriate compression technique for a single rescuer providing infant CPR?
A. Two-thumb encircling hands technique
B. One hand in center of chest
C. Two fingers just below nipple line
D. Two fists at midline
✅ Answer: C. Two fingers just below nipple line

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100. When performing adult CPR, where should your shoulders be in relation to your hands?
A. Off to the side
B. Directly over the hands
C. Behind the hands
D. At chest level
✅ Answer: B. Directly over the hands

BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 9)

 

BLS MCQs – Set 9 (Questions 81–90)

81. A choking infant becomes unresponsive. What should you do first?
A. Deliver back slaps and chest thrusts
B. Attempt blind finger sweep
C. Start CPR, beginning with chest compressions
D. Give 5 abdominal thrusts
✅ Answer: C. Start CPR, beginning with chest compressions

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82. When should rescuers perform mouth-to-mouth ventilation instead of bag-mask ventilation?
A. In hospital with multiple rescuers
B. In out-of-hospital settings without equipment
C. When the airway is obstructed
D. During pediatric advanced life support
✅ Answer: B. In out-of-hospital settings without equipment

83. If a victim is breathing normally but unresponsive, what is the best next action?
A. Begin CPR
B. Place in the recovery position and monitor
C. Call for help and leave them alone
D. Administer oxygen
✅ Answer: B. Place in the recovery position and monitor

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84. How should you modify AED use for a patient lying in water?
A. Use immediately
B. Dry chest before applying pads
C. Apply pads to wet chest
D. Wait until paramedics arrive
✅ Answer: B. Dry chest before applying pads

85. Which pulse is typically checked in a child (1 year to puberty)?
A. Radial
B. Carotid or femoral
C. Brachial only
D. Apical
✅ Answer: B. Carotid or femoral

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86. What should be avoided during rescue breathing in all age groups?
A. Bag-mask ventilation
B. Giving breaths too slowly
C. Over-ventilation
D. Oxygen supplementation
✅ Answer: C. Over-ventilation

87. What is the best way to deliver rescue breaths with a bag-mask device for a child?
A. One-person technique
B. With the mask tilted slightly off
C. Two-rescuer technique with one sealing mask and one squeezing bag
D. Without opening airway
✅ Answer: C. Two-rescuer technique with one sealing mask and one squeezing bag

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88. If a victim is not breathing and has no pulse, but the AED is not available, what should you do?
A. Wait for AED
B. Begin CPR immediately
C. Give oxygen
D. Deliver back slaps
✅ Answer: B. Begin CPR immediately

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89. What is the compression depth for an adult during CPR?
A. About 1 inch
B. About 1.5 inches
C. At least 2 inches (5 cm)
D. Less than 2 inches
✅ Answer: C. At least 2 inches (5 cm)

90. Why is full chest recoil important during compressions?
A. It prevents rib fractures
B. It allows blood to refill the heart
C. It increases respiratory effort
D. It reduces pain
✅ Answer: B. It allows blood to refill the heart

BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 8)

 BLS MCQs – Set 8 

71. When using a bag-mask device during 2-rescuer CPR, one rescuer should:
A. Deliver compressions and breaths
B. Squeeze the bag and check the pulse
C. Seal the mask and open the airway
D. Apply AED pads
✅ Answer: C. Seal the mask and open the airway

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72. Which of the following best describes the purpose of high-quality CPR?
A. To increase blood pressure
B. To allow defibrillation to work
C. To maintain perfusion to vital organs
D. To prepare the body for intubation
✅ Answer: C. To maintain perfusion to vital organs

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73. You check an unresponsive victim and see gasping breaths but no pulse. What should you do?
A. Give oxygen only
B. Start rescue breathing
C. Begin high-quality CPR
D. Wait for a second rescuer
✅ Answer: C. Begin high-quality CPR

74. What is the key action to reduce time to first chest compression in a collapsed victim?
A. Check pulse for 20 seconds
B. Delay CPR until AED arrives
C. Start compressions within 10 seconds
D. Wait for medical personnel
✅ Answer: C. Start compressions within 10 seconds

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75. What should you do when an AED is analyzing the rhythm?
A. Continue chest compressions
B. Deliver rescue breaths
C. Clear the victim and avoid touching
D. Apply more gel to pads
✅ Answer: C. Clear the victim and avoid touching

76. What is the primary concern when providing CPR to a pregnant woman?
A. Avoid compressions
B. Provide breaths only
C. Manually displace the uterus to the left
D. Defibrillate with reduced energy
✅ Answer: C. Manually displace the uterus to the left

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77. What is a common complication of poor mask seal during rescue breathing?
A. Gastric inflation
B. Increased tidal volume
C. Slower oxygenation
D. Chest pain
✅ Answer: A. Gastric inflation

78. What is the most appropriate action if an AED pad won’t stick to a sweaty chest?
A. Skip using the AED
B. Apply pads to the back
C. Dry the chest before applying pads
D. Use more gel
✅ Answer: C. Dry the chest before applying pads

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79. Which of the following is true regarding CPR in a drowning victim?
A. Chest compressions only
B. Start with rescue breaths
C. Always give abdominal thrusts first
D. Check pulse for 30 seconds
✅ Answer: B. Start with rescue breaths

80. During 2-rescuer CPR for an adult, when should rescuers switch roles?
A. Every 5 cycles or about 2 minutes
B. After 30 minutes
C. Only when AED arrives
D. After 1 cycle
✅ Answer: A. Every 5 cycles or about 2 minutes

BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 7)

 

BLS MCQs – Set 7

61. What is the recommended way to confirm the effectiveness of chest compressions?
A. Audible chest clicks
B. Chest wall movement
C. Presence of a palpable carotid pulse during compressions
D. Rescuer’s feeling of compression depth
✅ Answer: C. Presence of a palpable carotid pulse during compressions

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62. What is the most common initial rhythm in sudden cardiac arrest in adults?
A. Asystole
B. Pulseless electrical activity (PEA)
C. Ventricular fibrillation (VF)
D. Sinus bradycardia
✅ Answer: C. Ventricular fibrillation (VF)

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63. What is the proper chest compression depth in an infant?
A. At least 1/3 the depth of the chest (~1.5 inches or 4 cm)
B. 1 inch
C. 2 inches
D. At least 1/2 the chest depth
✅ Answer: A. At least 1/3 the depth of the chest (~1.5 inches or 4 cm)

64. Which of the following is a sign of poor perfusion in infants and children?
A. Warm extremities
B. Strong peripheral pulses
C. Altered mental status
D. Capillary refill under 2 seconds
✅ Answer: C. Altered mental status

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65. What is the correct action if a victim has a tracheostomy and needs rescue breathing?
A. Seal the stoma and give breaths through the mouth
B. Breathe through the nose only
C. Give breaths directly through the tracheostomy
D. Use abdominal thrusts
✅ Answer: C. Give breaths directly through the tracheostomy

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66. During CPR, what should you do if the victim begins to move or breathe normally?
A. Continue CPR
B. Give rescue breaths only
C. Stop CPR and monitor breathing
D. Wait for AED instruction
✅ Answer: C. Stop CPR and monitor breathing

67. How should compressions be performed when using a bag-mask device in 2-rescuer infant CPR?
A. With one finger
B. With heel of the hand
C. Two-thumb encircling technique
D. With chest slaps
✅ Answer: C. Two-thumb encircling technique

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68. What is the compression rate for all age groups in BLS?
A. 80–100/min
B. 90–110/min
C. 100–120/min
D. 120–140/min
✅ Answer: C. 100–120/min

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69. What is the most critical factor in successful defibrillation?
A. Pad placement
B. Compression depth
C. Early defibrillation
D. Oxygen availability
✅ Answer: C. Early defibrillation

70. What is the first step in pediatric BLS when you see a child collapse?
A. Call EMS
B. Check responsiveness and breathing
C. Open the airway
D. Begin chest compressions
✅ Answer: B. Check responsiveness and breathing

BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 6)

 BLS MCQs – Set 6 (Bonus)

51. What does the “C” in CAB of BLS stand for?
A. Check
B. Chest
C. Compressions
D. Circulation
✅ Answer: C. Compressions

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52. What should rescuers do if they suspect a head or neck injury during CPR?
A. Use jaw-thrust without head tilt to open the airway
B. Use head tilt–chin lift as usual
C. Avoid CPR
D. Wait for a cervical collar
✅ Answer: A. Use jaw-thrust without head tilt to open the airway

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53. What is the correct compression-to-breaths ratio for a newborn (neonatal resuscitation)?
A. 3:1
B. 5:1
C. 15:2
D. 30:2
✅ Answer: A. 3:1 (Note: specific to neonates)

54. Which of the following is most accurate regarding hands-only CPR?
A. It is recommended only for infants
B. It is equally effective as conventional CPR in adults
C. It includes rescue breaths and compressions
D. It is recommended for untrained bystanders
✅ Answer: D. It is recommended for untrained bystanders

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55. When do you start CPR on an infant with a pulse <60/min and signs of poor perfusion?
A. Only if the pulse drops to 40
B. Immediately
C. After 2 minutes of rescue breaths
D. Wait until pulse is gone
✅ Answer: B. Immediately

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56. Why is it important to avoid excessive ventilation during CPR?
A. It speeds up the heart rate
B. It causes oxygen toxicity
C. It increases intrathoracic pressure and reduces cardiac output
D. It improves blood pressure
✅ Answer: C. It increases intrathoracic pressure and reduces cardiac output

57. What does the AED do after analyzing the rhythm and finding no shockable rhythm?
A. Prompts the rescuer to stop CPR
B. Tells rescuer to check pulse
C. Advises to continue CPR
D. Automatically restarts
✅ Answer: C. Advises to continue CPR

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58. What is a common sign of effective CPR in a hospital setting?
A. Cyanosis
B. ROSC (return of spontaneous circulation)
C. Absent pulse
D. Dry airway
✅ Answer: B. ROSC (return of spontaneous circulation)

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59. What is the appropriate step if you notice a victim has a pacemaker where AED pads should be placed?
A. Do not use AED
B. Place the pad directly over the device
C. Place the pad at least 1 inch away from the device
D. Turn off the pacemaker
✅ Answer: C. Place the pad at least 1 inch away from the device

60. Which of the following actions is NOT part of the adult BLS algorithm?
A. Open airway and give rescue breaths
B. Start compressions if no pulse
C. Administer IV medications
D. Attach and use AED as soon as available
✅ Answer: C. Administer IV medications

BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 5)

 

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

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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

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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

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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

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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

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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

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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

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

BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 3)

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

21. What is the first step in using an AED?
A. Attach the pads
B. Plug in the AED
C. Power on the AED
D. Begin chest compressions
✅ Answer: C. Power on the AED

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22. If you witness a child suddenly collapse and they are unresponsive, what should you do first?
A. Start CPR for 2 minutes
B. Activate EMS and get an AED
C. Give rescue breaths
D. Perform back blows
✅ Answer: B. Activate EMS and get an AED

23. Which of the following is a sign of effective CPR?
A. Chest rises during compressions
B. The AED says “No shock advised”
C. The victim begins to breathe normally
D. The chest rises with each compression
✅ Answer: C. The victim begins to breathe normally

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24. What is the correct compression technique for an infant with 2 rescuers?
A. One thumb on chest
B. Two fingers on chest
C. Two-thumb encircling hands technique
D. Palm of one hand
✅ Answer: C. Two-thumb encircling hands technique

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25. What is the compression-to-ventilation ratio for 2-rescuer CPR in infants?
A. 30:2
B. 5:1
C. 15:2
D. 3:1
✅ Answer: C. 15:2

26. What is the best location to check a pulse in an unresponsive adult?
A. Radial artery
B. Carotid artery
C. Brachial artery
D. Femoral artery
✅ Answer: B. Carotid artery

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27. When should you switch roles during 2-rescuer CPR?
A. After 5 minutes
B. After each shock
C. Every 2 minutes (or 5 cycles of 30:2)
D. Only when tired
✅ Answer: C. Every 2 minutes (or 5 cycles of 30:2)

28. Which of the following victims requires CPR?
A. Breathing and responsive
B. Unresponsive and breathing normally
C. Unresponsive and not breathing or only gasping
D. Unresponsive but with a strong pulse
✅ Answer: C. Unresponsive and not breathing or only gasping

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29. You are a lone provider. You find a child in arrest that was unwitnessed. What should you do?
A. Call EMS and then start CPR
B. Start CPR for about 2 minutes, then activate EMS and get AED
C. Use AED first
D. Wait for a second rescuer
✅ Answer: B. Start CPR for about 2 minutes, then activate EMS and get AED

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30. When performing CPR, how can you minimize interruptions in chest compressions?
A. By stopping after each cycle
B. By waiting for AED to fully analyze before continuing
C. By switching compressors every 30 seconds
D. By preparing AED use and rescue breaths during compressions
✅ Answer: D. By preparing AED use and rescue breaths during compressions

BLS (Basic Life Support) multiple choice questions (MCQs) with answers (SET 2)

 

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

11. When giving high-quality CPR to an adult, what action should you ensure is being accomplished?
A. Giving breaths as fast as possible
B. Compressing at a depth of at least 1 inch
C. Compressing at least 2 inches and allowing full chest recoil
D. Delivering compressions at a rate of 80/min
✅ Answer: C. Compressing at least 2 inches and allowing full chest recoil

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12. What is the best way to relieve severe choking in a responsive adult?
A. Start CPR
B. Perform abdominal thrusts (Heimlich maneuver)
C. Give back slaps
D. Deliver rescue breaths
✅ Answer: B. Perform abdominal thrusts (Heimlich maneuver)

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13. What should you do if a choking victim becomes unresponsive?
A. Continue abdominal thrusts
B. Leave them and get help
C. Start CPR, beginning with chest compressions
D. Give two quick rescue breaths
✅ Answer: C. Start CPR, beginning with chest compressions

14. What is the most important factor in increasing survival for cardiac arrest?
A. Early advanced airway
B. Early defibrillation
C. High-flow oxygen
D. Transport to hospital
✅ Answer: B. Early defibrillation

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15. How can you tell if your rescue breaths for an infant are effective?
A. Chest visibly rises with each breath
B. The infant cries
C. Air comes out of the mouth
D. The color of the face changes
✅ Answer: A. Chest visibly rises with each breath

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16. For adults, how many hands are typically used for chest compressions during CPR?
A. One hand
B. Two fingers
C. Two hands
D. One finger
✅ Answer: C. Two hands

17. What is the correct hand placement for chest compressions in an adult?
A. Upper chest
B. Center of the chest, on the sternum
C. Over the ribs
D. Below the ribcage
✅ Answer: B. Center of the chest, on the sternum

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18. For a child victim, how deep should compressions be?
A. About 1 inch
B. At least one-third the depth of the chest (about 2 inches)
C. 2.5 inches
D. 1.5 inches
✅ Answer: B. At least one-third the depth of the chest (about 2 inches)

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19. What is the compression rate per minute in high-quality CPR for any age?
A. 80–100/min
B. 90–110/min
C. 100–120/min
D. 120–140/min
✅ Answer: C. 100–120/min

20. When using an AED on an infant or small child, what should you do if pediatric pads are not available?
A. Do not use AED
B. Use adult pads, one on the chest and one on the back
C. Cut adult pads to fit
D. Use both adult pads on the chest
✅ Answer: B. Use adult pads, one on the chest and one on the back

BLS (Basic Life Support) multiple choice questions (MCQs) with answers, (SET 1)

 

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

1. What is the correct compression-to-ventilation ratio for 1-rescuer adult CPR?
A. 15:2
B. 30:2
C. 5:1
D. 20:2
✅ Answer: B. 30:2

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2. What is the preferred method for opening the airway of an unresponsive victim with no suspected spinal injury?
A. Jaw thrust
B. Head tilt–chin lift
C. Finger sweep
D. Abdominal thrust
✅ Answer: B. Head tilt–chin lift

3. What is the first step you should take when you see someone collapse?
A. Begin chest compressions
B. Call for help
C. Check for responsiveness
D. Give 2 rescue breaths
✅ Answer: C. Check for responsiveness

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4. What is the recommended rate for chest compressions in adults?
A. 60–80/min
B. 80–100/min
C. 100–120/min
D. 120–140/min
✅ Answer: C. 100–120/min

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5. For a child, what is the depth of chest compressions recommended during CPR?
A. At least 1 inch
B. About 1.5 inches
C. At least 2 inches
D. About 2 inches (5 cm)
✅ Answer: D. About 2 inches (5 cm)

6. How often should breaths be given during rescue breathing (for an adult with a pulse but no breathing)?
A. Every 3–5 seconds
B. Every 6 seconds (10 breaths/min)
C. Every 8 seconds
D. Every 10 seconds
✅ Answer: B. Every 6 seconds (10 breaths/min)

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7. If an AED advises a shock, what should you do next?
A. Start chest compressions
B. Check the pulse
C. Deliver the shock and resume CPR immediately
D. Wait for a second rhythm analysis
✅ Answer: C. Deliver the shock and resume CPR immediately

8. What is the appropriate action after the AED delivers a shock?
A. Wait for further instructions
B. Start CPR immediately
C. Give rescue breaths
D. Check pulse for 10 seconds
✅ Answer: B. Start CPR immediately

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9. What is the compression-to-ventilation ratio for 2-rescuer child CPR?
A. 30:2
B. 15:2
C. 5:1
D. 20:2
✅ Answer: B. 15:2

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10. You are alone and find an unresponsive infant. What should you do first?
A. Call 911 immediately
B. Give back slaps
C. Perform CPR for 2 minutes, then call emergency services
D. Look for a defibrillator
✅ Answer: C. Perform CPR for 2 minutes, then call emergency services