Page 1 of 26
ACLS POST TEST 1, 2 & 3 Actual Questions
and Answers With Expert Explanation
(2026/2027 Update) | Complete A+ Guide
1. You are first to arrive at the side of an unresponsive
adult. What is the first step?
A. Check for pulse
B. Start chest compressions
C. Verify scene safety
D. Open the airway
Answer: C. Verify scene safety
Rationale: Scene safety is always first to protect the rescuer.
After that, check responsiveness, then activate emergency
response, check pulse/breathing.
,Page 2 of 26
2. A patient is in cardiac arrest. The rhythm is ventricular
fibrillation. The first shock is delivered. What is the next
action immediately after the shock?
A. Check pulse
B. Resume chest compressions
C. Administer epinephrine
D. Analyze rhythm
Answer: B. Resume chest compressions
Rationale: After defibrillation, immediately resume CPR for 2
minutes before checking a rhythm or pulse. Minimize
interruptions.
3. What is the recommended compression-to-ventilation
ratio for a single rescuer in adult CPR?
A. 15:2
B. 30:2
C. 30:1
D. Continuous compressions only
, Page 3 of 26
Answer: B. 30:2
Rationale: 30:2 is recommended for single rescuer adult CPR.
For two rescuers with advanced airway, give continuous
compressions at 100-120/min with one breath every 6
seconds.
4. A patient in the ICU becomes pulseless. The monitor
shows asystole. Which of the following is the priority?
A. Defibrillate at 200J
B. Administer epinephrine 1mg IV push
C. Begin high-quality CPR
D. Insert an advanced airway
Answer: C. Begin high-quality CPR
Rationale: For asystole, CPR is the priority. Epinephrine is
given as soon as possible, but CPR must not be delayed.
5. A 60-year-old man collapses. You confirm
unresponsiveness, no breathing, and no pulse. You activate
EMS and get an AED. The AED advises "No shock advised."
ACLS POST TEST 1, 2 & 3 Actual Questions
and Answers With Expert Explanation
(2026/2027 Update) | Complete A+ Guide
1. You are first to arrive at the side of an unresponsive
adult. What is the first step?
A. Check for pulse
B. Start chest compressions
C. Verify scene safety
D. Open the airway
Answer: C. Verify scene safety
Rationale: Scene safety is always first to protect the rescuer.
After that, check responsiveness, then activate emergency
response, check pulse/breathing.
,Page 2 of 26
2. A patient is in cardiac arrest. The rhythm is ventricular
fibrillation. The first shock is delivered. What is the next
action immediately after the shock?
A. Check pulse
B. Resume chest compressions
C. Administer epinephrine
D. Analyze rhythm
Answer: B. Resume chest compressions
Rationale: After defibrillation, immediately resume CPR for 2
minutes before checking a rhythm or pulse. Minimize
interruptions.
3. What is the recommended compression-to-ventilation
ratio for a single rescuer in adult CPR?
A. 15:2
B. 30:2
C. 30:1
D. Continuous compressions only
, Page 3 of 26
Answer: B. 30:2
Rationale: 30:2 is recommended for single rescuer adult CPR.
For two rescuers with advanced airway, give continuous
compressions at 100-120/min with one breath every 6
seconds.
4. A patient in the ICU becomes pulseless. The monitor
shows asystole. Which of the following is the priority?
A. Defibrillate at 200J
B. Administer epinephrine 1mg IV push
C. Begin high-quality CPR
D. Insert an advanced airway
Answer: C. Begin high-quality CPR
Rationale: For asystole, CPR is the priority. Epinephrine is
given as soon as possible, but CPR must not be delayed.
5. A 60-year-old man collapses. You confirm
unresponsiveness, no breathing, and no pulse. You activate
EMS and get an AED. The AED advises "No shock advised."
