ACLS Post Test 1, 2, 3 & 4
Questions and Ansẉers with
Rationales 2026\2027 update
This Exam contains:
Guarantee passing score
Questions and Ansẉers
format set of multiple-choice
Expert-Verified rationales
Verified ẉith trusted textbooks
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1. What is the recommended compression-to-ventilation ratio for a
single rescuer performing CPR on an adult?
A) 15:1
B) 30:2
C) 30:1
D) 15:2
Answer: B) 30:2
Rationale: The AHA recommends a compression-to-ventilation ratio
of 30:2 for single-rescuer CPR on adults. This ratio maximizes the
number of chest compressions delivered per minute while still
providing adequate ventilation.
2. What is the correct depth of chest compressions for an adult
during CPR?
A) At least 1 inch
B) At least 1.5 inches
C) At least 2 inches
D) At least 3 inches
Answer: C) At least 2 inches
Rationale: The AHA recommends compressing the adult chest at
least 2 inches (5 cm) but not greater than 2.4 inches (6 cm).
Adequate depth is essential for generating sufficient cardiac output
during CPR.
3. What is the recommended rate of chest compressions during
adult CPR?
A) 60-80 per minute
B) 80-100 per minute
C) 100-120 per minute
D) 120-140 per minute
,Answer: C) 100-120 per minute
Rationale: The AHA recommends a compression rate of 100-120 per
minute. Rates faster than 120 per minute result in inadequate chest
recoil and decreased compression depth, reducing effectiveness.
4. What is the maximum interval for pausing chest compressions
during CPR?
A) 5 seconds
B) 10 seconds
C) 15 seconds
D) 20 seconds
Answer: B) 10 seconds
Rationale: Chest compression pauses should be limited to no more
than 10 seconds for any intervention (e.g., intubation,
defibrillation). Prolonged pauses significantly decrease coronary
perfusion pressure and reduce survival rates.
5. Which of the following is a component of high-quality CPR?
A) Minimizing chest recoil
B) Allowing full chest recoil between compressions
C) Compressing at a rate of 80-100 per minute
D) Ventilating after every 5 compressions
Answer: B) Allowing full chest recoil between compressions
Rationale: Full chest recoil allows the heart to refill with blood
between compressions. Incomplete recoil increases intrathoracic
pressure and decreases venous return and cardiac output.
6. What is the first step in the ACLS approach after confirming
cardiac arrest?
A) Administer epinephrine
B) Begin chest compressions
, C) Defibrillate immediately
D) Establish IV access
Answer: B) Begin chest compressions
Rationale: High-quality CPR should be started immediately after
confirming cardiac arrest. Compressions maintain perfusion to vital
organs, particularly the brain and heart, before defibrillation or
medications can be effective.
7. How often should you switch chest compressors during CPR?
A) Every 1 minute
B) Every 2 minutes
C) Every 5 minutes
D) Every 10 minutes
Answer: B) Every 2 minutes
Rationale: Compressors should switch every 2 minutes (or after
about 5 cycles of CPR) to prevent fatigue and maintain high-quality
compressions. The switch should be completed in less than 10
seconds.
8. What is the proper hand placement for adult chest compressions?
A) Over the xiphoid process
B) Lower half of the sternum
C) Upper half of the sternum
D) Over the left nipple
Answer: B) Lower half of the sternum
Rationale: Hands should be placed on the lower half of the sternum,
with the heel of one hand on the center of the chest and the other
hand on top. This position optimizes cardiac output and minimizes
injury risk.
Questions and Ansẉers with
Rationales 2026\2027 update
This Exam contains:
Guarantee passing score
Questions and Ansẉers
format set of multiple-choice
Expert-Verified rationales
Verified ẉith trusted textbooks
,───────────────────────────────────────────────────────
─
1. What is the recommended compression-to-ventilation ratio for a
single rescuer performing CPR on an adult?
A) 15:1
B) 30:2
C) 30:1
D) 15:2
Answer: B) 30:2
Rationale: The AHA recommends a compression-to-ventilation ratio
of 30:2 for single-rescuer CPR on adults. This ratio maximizes the
number of chest compressions delivered per minute while still
providing adequate ventilation.
2. What is the correct depth of chest compressions for an adult
during CPR?
A) At least 1 inch
B) At least 1.5 inches
C) At least 2 inches
D) At least 3 inches
Answer: C) At least 2 inches
Rationale: The AHA recommends compressing the adult chest at
least 2 inches (5 cm) but not greater than 2.4 inches (6 cm).
Adequate depth is essential for generating sufficient cardiac output
during CPR.
3. What is the recommended rate of chest compressions during
adult CPR?
A) 60-80 per minute
B) 80-100 per minute
C) 100-120 per minute
D) 120-140 per minute
,Answer: C) 100-120 per minute
Rationale: The AHA recommends a compression rate of 100-120 per
minute. Rates faster than 120 per minute result in inadequate chest
recoil and decreased compression depth, reducing effectiveness.
4. What is the maximum interval for pausing chest compressions
during CPR?
A) 5 seconds
B) 10 seconds
C) 15 seconds
D) 20 seconds
Answer: B) 10 seconds
Rationale: Chest compression pauses should be limited to no more
than 10 seconds for any intervention (e.g., intubation,
defibrillation). Prolonged pauses significantly decrease coronary
perfusion pressure and reduce survival rates.
5. Which of the following is a component of high-quality CPR?
A) Minimizing chest recoil
B) Allowing full chest recoil between compressions
C) Compressing at a rate of 80-100 per minute
D) Ventilating after every 5 compressions
Answer: B) Allowing full chest recoil between compressions
Rationale: Full chest recoil allows the heart to refill with blood
between compressions. Incomplete recoil increases intrathoracic
pressure and decreases venous return and cardiac output.
6. What is the first step in the ACLS approach after confirming
cardiac arrest?
A) Administer epinephrine
B) Begin chest compressions
, C) Defibrillate immediately
D) Establish IV access
Answer: B) Begin chest compressions
Rationale: High-quality CPR should be started immediately after
confirming cardiac arrest. Compressions maintain perfusion to vital
organs, particularly the brain and heart, before defibrillation or
medications can be effective.
7. How often should you switch chest compressors during CPR?
A) Every 1 minute
B) Every 2 minutes
C) Every 5 minutes
D) Every 10 minutes
Answer: B) Every 2 minutes
Rationale: Compressors should switch every 2 minutes (or after
about 5 cycles of CPR) to prevent fatigue and maintain high-quality
compressions. The switch should be completed in less than 10
seconds.
8. What is the proper hand placement for adult chest compressions?
A) Over the xiphoid process
B) Lower half of the sternum
C) Upper half of the sternum
D) Over the left nipple
Answer: B) Lower half of the sternum
Rationale: Hands should be placed on the lower half of the sternum,
with the heel of one hand on the center of the chest and the other
hand on top. This position optimizes cardiac output and minimizes
injury risk.
