ACLS POST TEST COMPLETE EXAM QUESTIONS AND
VERIFIED ANSWERS | 2026–2027 LATEST UPDATE |
GUARANTEED PASS | DETAILED RATIONALES | FULL STUDY
GUIDE | EXAM PREP | PRACTICE TEST | CERTIFICATION
PREPARATION
SECTION ONE — QUESTIONS 1–100
1. A patient is found unresponsive, apneic, and pulseless. After activating the emergency response
system and retrieving the AED, what is the correct first action?
A) Open the airway and deliver two rescue breaths
B) Start chest compressions at a rate of 100–120/min
C) Apply the AED pads and analyze the rhythm
D) Establish IV access and administer epinephrine
Correct Answer: Start chest compressions at a rate of 100–120/min
The AHA guidelines emphasize the C-A-B sequence for cardiac arrest, prioritizing immediate chest
compressions over airway and breathing interventions. Delaying compressions to provide breaths or
apply the AED reduces coronary perfusion pressure and decreases survival. High-quality CPR with
minimal interruptions is the foundation of all resuscitation efforts.
2. During high-quality CPR on an adult, what is the recommended compression depth?
A) At least 1 inch (2.5 cm)
B) At least 1.5 inches (4 cm)
C) At least 2 inches (5 cm)
D) At least 2.5 inches (6 cm)
Correct Answer: At least 2 inches (5 cm)
Adequate compression depth ensures effective cardiac output during CPR. The AHA recommends
compressing at least 2 inches (5 cm) in adults while avoiding excessive depth greater than 2.4 inches
(6 cm). Shallower compressions generate insufficient perfusion pressure and reduce the likelihood of
return of spontaneous circulation.
3. Which action is essential to allow complete chest recoil during CPR?
A) Leaning slightly on the chest between compressions
,B) Maintaining constant pressure on the sternum
C) Fully releasing pressure after each compression
D) Pausing compressions every 30 seconds
Correct Answer: Fully releasing pressure after each compression
Complete chest recoil allows the heart to refill with blood between compressions, which is essential
for generating adequate cardiac output. Leaning on the chest impedes venous return, increases
intrathoracic pressure, and decreases coronary perfusion. Rescuers should ensure full recoil while
maintaining proper hand position.
4. What is the maximum allowable interruption in chest compressions for rhythm analysis or pulse
checks?
A) 5 seconds or less
B) 10 seconds or less
C) 15 seconds or less
D) 20 seconds or less
Correct Answer: 10 seconds or less
Minimizing interruptions preserves coronary and cerebral perfusion pressure during resuscitation.
The AHA recommends limiting all pauses to 10 seconds or less for pulse checks, rhythm analysis, or
shock delivery. Longer interruptions are associated with decreased survival rates and worse
neurological outcomes.
5. A team is performing CPR on a patient in cardiac arrest. How frequently should the compressor
role be rotated?
A) Every 1 minute
B) Every 2 minutes
C) Every 5 minutes
D) Every 10 minutes
Correct Answer: Every 2 minutes
Compressor fatigue develops rapidly and compromises compression quality. The AHA recommends
switching compressors approximately every 2 minutes or during rhythm analysis to maintain
adequate depth and rate. Rotations should be coordinated with pulse checks to minimize
interruptions in compressions.
6. During a resuscitation attempt, the team leader notices the compressor is delivering
compressions at 80/min. What instruction should the team leader provide?
,A) Increase the compression rate to 100–120/min
B) Maintain the current rate to avoid fatigue
C) Decrease the rate to allow for better depth
D) Pause compressions and reassess the rhythm
Correct Answer: Increase the compression rate to 100–120/min
The AHA recommends a compression rate of 100–120/min for adults. Rates below 100/min reduce
cardiac output and coronary perfusion, while rates above 120/min may compromise compression
depth and venous return. The team leader should provide real-time feedback to ensure quality CPR.
7. Which finding indicates inadequate ventilation during bag-mask ventilation?
A) Visible chest rise with each breath
B) Audible air escape around the mask
C) Gastric inflation with progressive abdominal distention
D) Oxygen saturation reading of 95%
Correct Answer: Gastric inflation with progressive abdominal distention
Gastric inflation indicates that air is entering the stomach rather than the lungs, often due to
excessive ventilation pressure or an improperly positioned airway. This complication can lead to
aspiration, reduced lung compliance, and inadequate oxygenation. Proper mask seal and ventilation
technique are essential to prevent gastric insufflation.
8. What is the recommended ventilation rate for an adult in cardiac arrest with an advanced
airway in place?
A) 1 breath every 2 seconds
B) 1 breath every 4 seconds
C) 1 breath every 6 seconds
D) 1 breath every 10 seconds
Correct Answer: 1 breath every 6 seconds
Once an advanced airway is placed, continuous compressions should be provided without pausing for
ventilations. The recommended rate is 1 breath every 6 seconds (10 breaths/min) for adults.
Excessive ventilation increases intrathoracic pressure, decreases venous return, and reduces cardiac
output.
9. A patient with a perfusing rhythm requires positive pressure ventilation. What is the
appropriate ventilation rate?
, A) 1 breath every 2 seconds
B) 1 breath every 4 seconds
C) 1 breath every 6 seconds
D) 1 breath every 8 seconds
Correct Answer: 1 breath every 6 seconds
For patients with a perfusing rhythm who require assisted ventilation, the AHA recommends 1 breath
every 6 seconds (10 breaths/min). This rate optimizes oxygenation and carbon dioxide elimination
while avoiding the hemodynamic consequences of hyperventilation. Over-ventilation can increase
intrathoracic pressure and impair cardiac output.
10. Which of the following is a sign of effective chest compressions during CPR?
A) End-tidal CO2 reading of 10 mm Hg
B) End-tidal CO2 reading of 35 mm Hg
C) Absence of palpable pulses during compressions
D) Compression depth of 1 inch
Correct Answer: End-tidal CO2 reading of 35 mm Hg
End-tidal CO2 (PETCO2) values correlate with cardiac output during CPR. A PETCO2 of at least 10 mm
Hg suggests adequate compressions, while values of 35–45 mm Hg indicate effective perfusion
approaching normal levels. Low PETCO2 readings suggest inadequate compression quality or poor
pulmonary blood flow.
11. A patient presents with an unresponsive state, agonal gasps, and no palpable pulse. What is
the most likely diagnosis?
A) Respiratory arrest
B) Cardiac arrest
C) Syncope
D) Seizure
Correct Answer: Cardiac arrest
Agonal gasps are ineffective, irregular breaths that occur in the early stages of cardiac arrest. Their
presence indicates severe hypoxia and imminent or actual cardiac arrest. Rescuers should recognize
agonal gasps as a sign of cardiac arrest and initiate CPR immediately rather than waiting for
traditional apnea.
12. Which drug is indicated as the first-line vasopressor during cardiac arrest?
VERIFIED ANSWERS | 2026–2027 LATEST UPDATE |
GUARANTEED PASS | DETAILED RATIONALES | FULL STUDY
GUIDE | EXAM PREP | PRACTICE TEST | CERTIFICATION
PREPARATION
SECTION ONE — QUESTIONS 1–100
1. A patient is found unresponsive, apneic, and pulseless. After activating the emergency response
system and retrieving the AED, what is the correct first action?
A) Open the airway and deliver two rescue breaths
B) Start chest compressions at a rate of 100–120/min
C) Apply the AED pads and analyze the rhythm
D) Establish IV access and administer epinephrine
Correct Answer: Start chest compressions at a rate of 100–120/min
The AHA guidelines emphasize the C-A-B sequence for cardiac arrest, prioritizing immediate chest
compressions over airway and breathing interventions. Delaying compressions to provide breaths or
apply the AED reduces coronary perfusion pressure and decreases survival. High-quality CPR with
minimal interruptions is the foundation of all resuscitation efforts.
2. During high-quality CPR on an adult, what is the recommended compression depth?
A) At least 1 inch (2.5 cm)
B) At least 1.5 inches (4 cm)
C) At least 2 inches (5 cm)
D) At least 2.5 inches (6 cm)
Correct Answer: At least 2 inches (5 cm)
Adequate compression depth ensures effective cardiac output during CPR. The AHA recommends
compressing at least 2 inches (5 cm) in adults while avoiding excessive depth greater than 2.4 inches
(6 cm). Shallower compressions generate insufficient perfusion pressure and reduce the likelihood of
return of spontaneous circulation.
3. Which action is essential to allow complete chest recoil during CPR?
A) Leaning slightly on the chest between compressions
,B) Maintaining constant pressure on the sternum
C) Fully releasing pressure after each compression
D) Pausing compressions every 30 seconds
Correct Answer: Fully releasing pressure after each compression
Complete chest recoil allows the heart to refill with blood between compressions, which is essential
for generating adequate cardiac output. Leaning on the chest impedes venous return, increases
intrathoracic pressure, and decreases coronary perfusion. Rescuers should ensure full recoil while
maintaining proper hand position.
4. What is the maximum allowable interruption in chest compressions for rhythm analysis or pulse
checks?
A) 5 seconds or less
B) 10 seconds or less
C) 15 seconds or less
D) 20 seconds or less
Correct Answer: 10 seconds or less
Minimizing interruptions preserves coronary and cerebral perfusion pressure during resuscitation.
The AHA recommends limiting all pauses to 10 seconds or less for pulse checks, rhythm analysis, or
shock delivery. Longer interruptions are associated with decreased survival rates and worse
neurological outcomes.
5. A team is performing CPR on a patient in cardiac arrest. How frequently should the compressor
role be rotated?
A) Every 1 minute
B) Every 2 minutes
C) Every 5 minutes
D) Every 10 minutes
Correct Answer: Every 2 minutes
Compressor fatigue develops rapidly and compromises compression quality. The AHA recommends
switching compressors approximately every 2 minutes or during rhythm analysis to maintain
adequate depth and rate. Rotations should be coordinated with pulse checks to minimize
interruptions in compressions.
6. During a resuscitation attempt, the team leader notices the compressor is delivering
compressions at 80/min. What instruction should the team leader provide?
,A) Increase the compression rate to 100–120/min
B) Maintain the current rate to avoid fatigue
C) Decrease the rate to allow for better depth
D) Pause compressions and reassess the rhythm
Correct Answer: Increase the compression rate to 100–120/min
The AHA recommends a compression rate of 100–120/min for adults. Rates below 100/min reduce
cardiac output and coronary perfusion, while rates above 120/min may compromise compression
depth and venous return. The team leader should provide real-time feedback to ensure quality CPR.
7. Which finding indicates inadequate ventilation during bag-mask ventilation?
A) Visible chest rise with each breath
B) Audible air escape around the mask
C) Gastric inflation with progressive abdominal distention
D) Oxygen saturation reading of 95%
Correct Answer: Gastric inflation with progressive abdominal distention
Gastric inflation indicates that air is entering the stomach rather than the lungs, often due to
excessive ventilation pressure or an improperly positioned airway. This complication can lead to
aspiration, reduced lung compliance, and inadequate oxygenation. Proper mask seal and ventilation
technique are essential to prevent gastric insufflation.
8. What is the recommended ventilation rate for an adult in cardiac arrest with an advanced
airway in place?
A) 1 breath every 2 seconds
B) 1 breath every 4 seconds
C) 1 breath every 6 seconds
D) 1 breath every 10 seconds
Correct Answer: 1 breath every 6 seconds
Once an advanced airway is placed, continuous compressions should be provided without pausing for
ventilations. The recommended rate is 1 breath every 6 seconds (10 breaths/min) for adults.
Excessive ventilation increases intrathoracic pressure, decreases venous return, and reduces cardiac
output.
9. A patient with a perfusing rhythm requires positive pressure ventilation. What is the
appropriate ventilation rate?
, A) 1 breath every 2 seconds
B) 1 breath every 4 seconds
C) 1 breath every 6 seconds
D) 1 breath every 8 seconds
Correct Answer: 1 breath every 6 seconds
For patients with a perfusing rhythm who require assisted ventilation, the AHA recommends 1 breath
every 6 seconds (10 breaths/min). This rate optimizes oxygenation and carbon dioxide elimination
while avoiding the hemodynamic consequences of hyperventilation. Over-ventilation can increase
intrathoracic pressure and impair cardiac output.
10. Which of the following is a sign of effective chest compressions during CPR?
A) End-tidal CO2 reading of 10 mm Hg
B) End-tidal CO2 reading of 35 mm Hg
C) Absence of palpable pulses during compressions
D) Compression depth of 1 inch
Correct Answer: End-tidal CO2 reading of 35 mm Hg
End-tidal CO2 (PETCO2) values correlate with cardiac output during CPR. A PETCO2 of at least 10 mm
Hg suggests adequate compressions, while values of 35–45 mm Hg indicate effective perfusion
approaching normal levels. Low PETCO2 readings suggest inadequate compression quality or poor
pulmonary blood flow.
11. A patient presents with an unresponsive state, agonal gasps, and no palpable pulse. What is
the most likely diagnosis?
A) Respiratory arrest
B) Cardiac arrest
C) Syncope
D) Seizure
Correct Answer: Cardiac arrest
Agonal gasps are ineffective, irregular breaths that occur in the early stages of cardiac arrest. Their
presence indicates severe hypoxia and imminent or actual cardiac arrest. Rescuers should recognize
agonal gasps as a sign of cardiac arrest and initiate CPR immediately rather than waiting for
traditional apnea.
12. Which drug is indicated as the first-line vasopressor during cardiac arrest?
