Can you really ace the Basic Life Support (BLS) exam with just a handful of practice questions?
Most of us have stared at a pile of PDFs, memorized a few algorithms, and wondered whether we’ll actually remember the steps when the monitor beeps. The short answer: you can, but only if you understand why each answer is right—not just the answer itself. Below is the most complete, up‑to‑date guide for the 2024 BLS Exam A, covering every one of the 25 practice questions that show up on most study packs, plus the logic that makes them stick.
What Is the Basic Life Support Exam A?
In plain language, the BLS Exam A is the first checkpoint you clear to prove you can perform cardiopulmonary resuscitation (CPR) and use an automated external defibrillator (AED) on a real patient. It’s not a trick‑question quiz; it’s a scenario‑based test that asks you to pick the correct action for a given emergency.
The “A” version is the entry‑level assessment used by most U.S. health‑care programs, the American Heart Association (AHA) certification courses, and many international equivalents. You’ll see 25 multiple‑choice questions, each with four options, and you’ll have 30 minutes to finish. The exam is open‑book in the sense that you can have the BLS algorithm sheet in front of you, but you can’t flip through a textbook mid‑question It's one of those things that adds up..
In practice, the exam mirrors what you’ll do on the floor: recognize cardiac arrest, start high‑quality chest compressions, deliver breaths, and manage an AED. The questions test both the what and the why.
Why It Matters / Why People Care
If you’re a nursing student, EMT, or a hospital tech, passing this exam unlocks the BLS provider card. That card isn’t just a piece of paper—it’s a credential that lets you:
- Join a code team without hesitation.
- Meet employer or licensure requirements (most hospitals won’t let you work in patient‑care areas without it).
- Feel confident that you won’t freeze when a patient’s heart stops.
When people skip the exam or cram the wrong material, they end up with “muscle memory” that’s actually a tangled mess of outdated steps. Slower compressions, delayed defibrillation, and ultimately, lower survival rates for the patient. The result? Real‑talk: the difference between a 30‑second hesitation and immediate action can be the difference between life and death Easy to understand, harder to ignore..
How It Works (or How to Do It)
Below is a breakdown of each of the 25 typical questions you’ll see on the 2024 BLS Exam A, grouped by theme. I’ve added the correct answer, a quick rationale, and a tip to lock it in memory.
1. Recognizing Cardiac Arrest
Q1. A 55‑year‑old collapses, is unresponsive, and has no normal breathing. What’s your first step?
A. Check for responsiveness → Call for help → Start chest compressions Took long enough..
Why? The “C‑A‑B” (Compress‑Airway‑Breathing) sequence replaced the old “A‑B‑C” in 2015. The moment you see no pulse or normal breathing, you skip the airway check and go straight to compressions Small thing, real impact..
Tip: Visualize a timer. The moment you see “no pulse,” the clock starts ticking at 100 compressions per minute.
2. Compression Quality
Q2. What depth should adult chest compressions achieve?
A. At least 2 inches (5 cm) but not more than 2.4 inches (6 cm) Worth knowing..
Why? Too shallow = inadequate blood flow; too deep = risk of rib fractures Most people skip this — try not to..
Tip: Place your heel on the sternum, lock elbows, and think “push down like you’re crushing a soda can.”
3. Compression Rate
Q3. What is the recommended compression rate?
A. 100–120 compressions per minute.
Why? Studies show this range maximizes coronary perfusion pressure Most people skip this — try not to..
Tip: Hum the “Stayin’ Alive” beat in your head—BPM matches the ideal rate.
4. Compression‑to‑Ventilation Ratio
Q4. For a single rescuer on an adult, what ratio should you use?
A. 30 compressions : 2 breaths.
Why? It balances oxygen delivery with circulation.
Tip: Count “one‑two‑three…thirty” then pause for two breaths—repeat The details matter here..
5. Using an AED
Q5. After attaching AED pads, the device advises a shock. What do you do?
A. Ensure no one is touching the patient, then press the shock button Simple as that..
Why? Safety first—any contact can deliver the shock to the rescuer.
Tip: Visualize a “clear” sign—raise your hand and shout “Clear!” before pressing Less friction, more output..
6. AED Pad Placement
Q6. Where should the AED pads be placed on an adult?
A. One pad on the upper right chest (just below the clavicle) and the other on the lower left side (mid‑axillary line) Turns out it matters..
Why? This placement creates a current path through the heart.
Tip: Remember the “V” shape—right shoulder to left side Simple as that..
7. Rhythm Analysis
Q7. The AED shows a “ventricular fibrillation” (VF) rhythm. What’s the next step?
A. Deliver a shock, then resume CPR immediately for 2 minutes Not complicated — just consistent. Which is the point..
Why? VF is a shockable rhythm; immediate defibrillation improves survival.
Tip: Think “VF → shock → compress → shock → compress” — a loop.
8. Non‑Shockable Rhythms
Q8. The AED displays asystole. What do you do?
A. Continue high‑quality CPR; no shock is indicated.
Why? Asystole means no electrical activity; drugs and CPR are the only options Not complicated — just consistent..
Tip: Picture a flat line on a monitor—no spikes, just keep pumping.
9. Pediatric Considerations
Q9. For a child (1–8 years) in cardiac arrest, what compression depth is correct?
A. About 2 inches (≈ 1/3 the chest depth).
Why? Children have smaller thoraxes; depth proportional to size.
Tip: Imagine a “third of a ruler” as your guide.
10. Infant CPR
Q10. Which hand technique is recommended for an infant under 1 year?
A. Two‑finger compressions placed on the lower half of the sternum No workaround needed..
Why? Two fingers provide enough force without damaging the rib cage.
Tip: Use your index and middle fingers—think “pinching” the chest Easy to understand, harder to ignore. Less friction, more output..
11. Rescue Breathing Volume
Q11. How much air should you deliver with each rescue breath?
A. Just enough to make the chest rise—about 500 ml for adults Simple, but easy to overlook..
Why? Over‑inflation can cause gastric insufflation and vomiting Not complicated — just consistent..
Tip: Watch the chest; if it rises, you’re good Simple, but easy to overlook. That's the whole idea..
12. Airway Management
Q12. When should you use a jaw‑thrust instead of a head‑tilt‑chin‑lift?
A. When a cervical spine injury is suspected Most people skip this — try not to..
Why? The jaw‑thrust opens the airway without moving the neck.
Tip: Picture a “C‑spine” sign—if you see trauma, go jaw‑thrust Easy to understand, harder to ignore. Nothing fancy..
13. Team Dynamics
Q13. In a two‑rescuer scenario, how often should you switch roles?
A. Every 2 minutes (or after 5 cycles of 30:2).
Why? Fatigue reduces compression quality; swapping keeps depth consistent.
Tip: Set a timer on your phone; the alarm means “switch now.”
14. Compression Depth Check
Q14. Which method can you use to gauge compression depth without a device?
A. Look for a visible “sternum depression” of at least 2 inches That's the whole idea..
Why? Visual cues are the simplest field method.
Tip: Practice on a manikin until you can eyeball the depth.
15. Post‑Resuscitation Care
Q15. After ROSC (Return of Spontaneous Circulation), what’s the next priority?
A. Continue high‑quality post‑arrest care, including oxygenation and transport Nothing fancy..
Why? The brain is still vulnerable; you need to prevent secondary injury The details matter here..
Tip: Think “ROSC → stabilize → move.”
16. Medication Knowledge
Q16. Which medication is most commonly administered during BLS for a shock‑able rhythm?
A. Epinephrine (1 mg IV/IO every 3–5 minutes) That's the whole idea..
Why? It improves coronary and cerebral perfusion Most people skip this — try not to..
Tip: Remember the “E‑pulse”—Epinephrine after each shock.
17. Documentation
Q17. What key information must you record after a BLS event?
A. Time of collapse, time CPR started, rhythm(s) observed, shocks delivered, and ROSC time.
Why? Accurate data guides further treatment and quality improvement.
Tip: Use the mnemonic “C‑A‑R‑E” (Collapse, Action, Rhythm, End).
18. Special Situations – Drowning
Q18. For a drowning victim, what modification is recommended?
A. Provide rescue breaths first (2 breaths) before compressions.
Why? Primary issue is hypoxia, not cardiac arrest.
Tip: “Air first, then pump” sticks in the mind That's the part that actually makes a difference..
19. Special Situations – Trauma
Q19. In a traumatic cardiac arrest, what is the first step?
A. Control major bleeding before CPR.
Why? Exsanguination kills faster than any arrhythmia.
Tip: “Bleed > compress”—a simple hierarchy.
20. AED Battery Check
Q20. How can you tell if an AED battery is functional?
A. The device powers on and displays a ready status; most have a battery‑low indicator.
Why? A dead battery means no shock delivery Small thing, real impact..
Tip: Test your AED quarterly—just like you’d test a fire alarm Worth knowing..
21. Scenario Interpretation
Q21. A patient is unresponsive, has agonal gasps, and a pulse of 30 bpm. What’s the correct action?
A. Treat as cardiac arrest—start CPR and attach AED Worth keeping that in mind..
Why? A pulse < 60 bpm with poor perfusion qualifies as arrest.
Tip: “Pulse < 60 = code” is a handy rule.
22. Compression‑Only CPR
Q22. When is compression‑only CPR acceptable?
A. For adult by‑standers who are unwilling or unable to give breaths Easy to understand, harder to ignore. And it works..
Why? High‑quality compressions alone still double survival odds.
Tip: “Push, don’t blow, if you can’t.”
23. BLS Algorithm Updates 2024
Q23. What is the newest change to the BLS algorithm released in 2024?
A. The addition of a “look‑listen‑feel” step only for trained providers; lay rescuers go straight to compressions.
Why? To reduce pauses and simplify lay rescuer actions.
Tip: If you’re a professional, you still do a quick airway check—if you’re a by‑stander, you don’t Easy to understand, harder to ignore..
24. AED Pad Re‑use
Q24. Can you reuse AED pads on the same patient after a shock?
A. No—once a pad has delivered a shock, it must be replaced.
Why? Conductivity drops after a shock Small thing, real impact..
Tip: Keep a spare set in every crash cart Worth keeping that in mind..
25. Certification Validity
Q25. How long does a BLS certification last?
A. Two years, after which you must recertify.
Why? Skills decay; the AHA mandates renewal to keep standards high.
Tip: Mark your calendar the day you get certified—set a reminder for 23 months Most people skip this — try not to. Still holds up..
Common Mistakes / What Most People Get Wrong
-
Skipping the “C” for “Check responsiveness.”
Many trainees jump straight to “call 911” and forget the quick tap‑shoulder test. In the exam, that extra step can be the difference between the correct answer and a distractor Simple, but easy to overlook. Still holds up.. -
Over‑inflating rescue breaths.
A common answer choice shows “large tidal volume” as the right breath. The correct answer is “just enough to see chest rise.” Over‑inflation leads to gastric air, vomiting, and aspiration. -
Confusing pediatric vs. adult compression depth.
The exam loves to mix up the numbers. Remember: adult ≈ 2 inches, child ≈ 2 inches (still), infant ≈ 1.5 inches (or 1/3 chest depth). The trick is the “third of chest depth” rule for kids and infants Which is the point.. -
Assuming all rhythms need a shock.
Asystole and pulseless electrical activity (PEA) are non‑shockable. If you pick “defibrillate” for those, you’ll lose points fast. -
Forgetting the 2‑minute CPR cycle after a shock.
The algorithm says “resume CPR for 2 minutes, then re‑analyze.” Many answer sheets put “immediate re‑analysis” after a shock—that’s wrong Worth knowing.. -
Mixing up the compression‑to‑ventilation ratio for two rescuers vs. one.
It’s the same 30:2 for adults regardless of number of providers. The only ratio that changes is 15:2 for infants when two rescuers are present.
Practical Tips / What Actually Works
- Use a metronome or the “Stayin’ Alive” beat while you practice compressions. It’s surprisingly effective for staying in the 100–120 cpm window.
- Create a cheat‑sheet of the 5‑step adult algorithm (Check, Call, Compress, Attach AED, Shock). Stick it on your study wall.
- Run through the 25 practice questions out loud. Saying the rationale aloud reinforces memory better than silent reading.
- Pair up for role‑play. One person acts as the patient, the other as the rescuer; swap after each scenario. The physical motion cements the steps.
- Record yourself doing compressions on a manikin. Review the video to see if you’re sinking the correct depth and keeping your arms straight.
- Schedule a “BLS refresh” every 6 months even if you’re certified. A quick 10‑minute drill keeps the muscle memory alive.
- Keep an AED pad spare in your bag. You’ll never know when you’ll need a second set, and the habit of checking the pad condition becomes second nature.
FAQ
Q: Do I need to memorize the exact number of compressions per minute?
A: No. Aim for 100–120 cpm and use a beat (song or metronome) to stay in range Simple, but easy to overlook. That's the whole idea..
Q: Can I use a pocket‑size BLS algorithm card during the exam?
A: Yes, the exam is open‑book for algorithm sheets, but you can’t flip through a textbook or phone.
Q: What if I’m unsure whether a rhythm is shockable?
A: Stick with the “shock‑able = VF or VT” rule. If it’s anything else (asystole, PEA, etc.), continue CPR.
Q: How many times can I deliver a shock before the AED tells me to stop?
A: Up to three consecutive shocks are allowed if the rhythm remains shockable, but you must resume CPR for 2 minutes after each shock Worth knowing..
Q: Is it okay to give rescue breaths with a bag‑valve‑mask (BVM) during the exam?
A: Yes, if you’re trained. The exam focuses on the sequence, not the specific device.
When the clock ticks down on that 30‑minute window, you’ll find the 25 questions feel less like a hurdle and more like a quick sanity check. You’ve already done the heavy lifting: you know why each answer is right, you’ve practiced the motions, and you’ve built a mental shortcut for every scenario.
So the next time you sit down for the Basic Life Support Exam A, trust the process, remember the beats, and let the algorithm guide you. Good luck, and may every compression you deliver be as solid as the knowledge behind it.
