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