BASIC LIFE SUPPORT (BLS) EXAM EXAM
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES GRADED A+ LATEST
1. What is the correct compression rate for high-quality adult CPR?
A. 60–80/min
B. 80–100/min
C. 100–120/min
D. 120–140/min
Answer: C
Rationale: AHA BLS guidelines require a compression rate of 100–120/min to
achieve optimal perfusion without excessively shallow compressions.
2. What is the recommended hand placement for adult chest compressions?
A. Lower half of the sternum
B. Upper sternum
C. Center of the chest over the nipple line
D. Xiphoid process
Answer: A
Rationale: Hands go on the lower half of the sternum, avoiding the xiphoid
process to reduce injury risk.
3. When two or more rescuers are present, what is the correct compression–
ventilation ratio for an adult?
A. 15:2
B. 30:2
C. 5:1
D. Continuous compressions with 1 breath every 5 seconds
,Answer: B
Rationale: Adult CPR always uses 30:2, regardless of number of rescuers, unless
an advanced airway is placed.
4. Which depth is appropriate for adult compressions?
A. 1 inch
B. 1.5 inches
C. 2–2.5 inches
D. At least 2 inches (5 cm)
Answer: D
Rationale: Compress the adult chest to at least 2 inches but not more than 2.4
inches.
5. You are alone and witness a sudden adult collapse. What is your first
action?
A. Check for breathing
B. Begin CPR
C. Verify scene safety
D. Look for injuries
Answer: C
Rationale: Always begin with scene safety to protect yourself before approaching
the victim.
6. You find an unresponsive adult but are unsure if they’re breathing
normally. What should you do?
A. Observe for 30 seconds
B. Check breathing for no more than 10 seconds
C. Immediately start CPR
D. Use the AED first
,Answer: B
Rationale: Breathing assessment must be ≤10 seconds to avoid CPR delays.
7. Agonal gasps should be treated as:
A. Normal breathing
B. A seizure
C. A sign to place in recovery position
D. No breathing / cardiac arrest
Answer: D
Rationale: Agonal gasps are ineffective breaths and indicate cardiac arrest.
8. When using an AED, what is your first step?
A. Attach pads
B. Apply shock
C. Start compressions
D. Turn on the AED
Answer: D
Rationale: AEDs give step-by-step instructions only after they are turned on.
9. Which victim requires CPR?
A. Unconscious but breathing
B. Unconscious and not breathing normally
C. Unconscious and snoring
D. Conscious but pale
Answer: B
Rationale: CPR is started when there is unresponsiveness + abnormal or absent
breathing.
, 10. When performing adult compressions, allow for complete chest recoil
because:
A. It prevents rib fractures
B. It reduces fatigue
C. It improves venous return to the heart
D. None of the above
Answer: C
Rationale: Full recoil is essential for coronary perfusion.
11. In two-rescuer CPR, roles should be switched every:
A. 30 seconds
B. 1 minute
C. 2 minutes or 5 cycles
D. 10 minutes
Answer: C
Rationale: Frequent switching prevents fatigue and maintains high-quality
compressions.
12. When giving rescue breaths without an advanced airway, each breath
should be delivered over:
A. 0.2 seconds
B. 1 second
C. 2 seconds
D. 5 seconds
Answer: B
Rationale: A 1-second breath avoids hyperventilation and allows visible chest rise.
13. What is the correct ventilation rate for adult rescue breathing (pulse
present, no breathing)?
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES GRADED A+ LATEST
1. What is the correct compression rate for high-quality adult CPR?
A. 60–80/min
B. 80–100/min
C. 100–120/min
D. 120–140/min
Answer: C
Rationale: AHA BLS guidelines require a compression rate of 100–120/min to
achieve optimal perfusion without excessively shallow compressions.
2. What is the recommended hand placement for adult chest compressions?
A. Lower half of the sternum
B. Upper sternum
C. Center of the chest over the nipple line
D. Xiphoid process
Answer: A
Rationale: Hands go on the lower half of the sternum, avoiding the xiphoid
process to reduce injury risk.
3. When two or more rescuers are present, what is the correct compression–
ventilation ratio for an adult?
A. 15:2
B. 30:2
C. 5:1
D. Continuous compressions with 1 breath every 5 seconds
,Answer: B
Rationale: Adult CPR always uses 30:2, regardless of number of rescuers, unless
an advanced airway is placed.
4. Which depth is appropriate for adult compressions?
A. 1 inch
B. 1.5 inches
C. 2–2.5 inches
D. At least 2 inches (5 cm)
Answer: D
Rationale: Compress the adult chest to at least 2 inches but not more than 2.4
inches.
5. You are alone and witness a sudden adult collapse. What is your first
action?
A. Check for breathing
B. Begin CPR
C. Verify scene safety
D. Look for injuries
Answer: C
Rationale: Always begin with scene safety to protect yourself before approaching
the victim.
6. You find an unresponsive adult but are unsure if they’re breathing
normally. What should you do?
A. Observe for 30 seconds
B. Check breathing for no more than 10 seconds
C. Immediately start CPR
D. Use the AED first
,Answer: B
Rationale: Breathing assessment must be ≤10 seconds to avoid CPR delays.
7. Agonal gasps should be treated as:
A. Normal breathing
B. A seizure
C. A sign to place in recovery position
D. No breathing / cardiac arrest
Answer: D
Rationale: Agonal gasps are ineffective breaths and indicate cardiac arrest.
8. When using an AED, what is your first step?
A. Attach pads
B. Apply shock
C. Start compressions
D. Turn on the AED
Answer: D
Rationale: AEDs give step-by-step instructions only after they are turned on.
9. Which victim requires CPR?
A. Unconscious but breathing
B. Unconscious and not breathing normally
C. Unconscious and snoring
D. Conscious but pale
Answer: B
Rationale: CPR is started when there is unresponsiveness + abnormal or absent
breathing.
, 10. When performing adult compressions, allow for complete chest recoil
because:
A. It prevents rib fractures
B. It reduces fatigue
C. It improves venous return to the heart
D. None of the above
Answer: C
Rationale: Full recoil is essential for coronary perfusion.
11. In two-rescuer CPR, roles should be switched every:
A. 30 seconds
B. 1 minute
C. 2 minutes or 5 cycles
D. 10 minutes
Answer: C
Rationale: Frequent switching prevents fatigue and maintains high-quality
compressions.
12. When giving rescue breaths without an advanced airway, each breath
should be delivered over:
A. 0.2 seconds
B. 1 second
C. 2 seconds
D. 5 seconds
Answer: B
Rationale: A 1-second breath avoids hyperventilation and allows visible chest rise.
13. What is the correct ventilation rate for adult rescue breathing (pulse
present, no breathing)?
