• 67 questions

CPR Practice Test

Unofficial lay rescuer questions on CPR, AED use and choking, written from the 2025 guidelines.

What do lay rescuers use to recognize cardiac arrest in an adult?

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Unofficial practice questions, not affiliated with the American Heart Association. Bank checked October 7, 2026.

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The real course, as the American Heart Association describes it

Required topics
Adult CPR and AED (compressions, breaths and AED), adult choking relief, opioid-associated emergency, water competency and drowning, heart attack and stroke.
Optional topics
Child CPR and AED, infant CPR and AED, child choking relief and infant choking relief.
Skills test
The topic list marks the adult, child and infant CPR AED topics as requiring a skills test.
Written test
The public course pages give no question count and no pass mark for a written test. Ask your Training Center what your class requires.
Formats and time
Classroom, blended learning or self-guided; 3 to 5 hours.
Card
A Heartsaver CPR AED course completion card, valid for two years, after all course requirements are completed.

Checked October 7, 2026 against American Heart Association, Heartsaver CPR AED Training page and Heartsaver Course Topics and Path List (Table 4). Rules change, so confirm with the agency itself before your test.

The Association's own page for this course

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All 67 questions

Recognizing an emergency and getting help 16

  • A bystander finds an adult who does not respond and is only gasping. What should the bystander assume? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.1 Recognition of Cardiac Arrest. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • A bystander worries about pressing on the chest of someone who turns out not to be in cardiac arrest. How do the guidelines rate that risk? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.1 Recognition of Cardiac Arrest. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • A lone rescuer identifies an adult in cardiac arrest. What comes first under the 2025 guidelines? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.2 Initiation of Resuscitation: Lay Rescuer. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
Show all 67 questions (64 more)

Recognizing an emergency and getting help, continued

  • The American Heart Association describes Hands-Only CPR as two steps. Calling 9-1-1 is one. What is the other? American Heart Association, What is CPR?, How is CPR Performed? Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • How can a lone rescuer with a mobile phone call for help and start compressions at almost the same time? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.2 Initiation of Resuscitation: Lay Rescuer. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • How does the American Heart Association's Cardiac Arrest vs. Heart Attack page classify cardiac arrest? American Heart Association, Cardiac Arrest vs. Heart Attack, What is Cardiac Arrest? Outline: AHA Heartsaver CPR AED topic list, Heart Attack.
  • Someone has chest discomfort and shortness of breath, and you are not sure it is a heart attack. What does the American Heart Association's page say to do? American Heart Association, Cardiac Arrest vs. Heart Attack, What is a Heart Attack? What to Do. Outline: AHA Heartsaver CPR AED topic list, Heart Attack.
  • Two bystanders find an unresponsive adult who is not breathing normally. After help is called, how do the lay rescuer action steps split the work? 2025 AHA Lay Rescuer Action Steps (accessible version), Boxes 2 to 4. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What do lay rescuers use to recognize cardiac arrest in an adult? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.1 Recognition of Cardiac Arrest. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What effect does the American Heart Association say immediate CPR can have on the chance of surviving cardiac arrest? American Heart Association, What is CPR?, What is CPR? Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What is Hands-Only CPR? American Heart Association, What is CPR?, How is CPR Performed? Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What is the first link in the Chain of Survival? American Heart Association, Chain of Survival (updated 2025), the 6 links. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What usually happens to the heartbeat during a heart attack? American Heart Association, Cardiac Arrest vs. Heart Attack, What is a Heart Attack? Outline: AHA Heartsaver CPR AED topic list, Heart Attack.
  • Which lay rescuers should give chest compressions to an adult in presumed cardiac arrest? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.2 Initiation of Resuscitation: Lay Rescuer. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • Which recognition scale do the first aid guidelines name to help spot a stroke in an adult? 2024 American Heart Association and American Red Cross Guidelines for First Aid, Recognition of Stroke in the First Aid Setting - Adults. Outline: AHA Heartsaver CPR AED topic list, Stroke.
  • Why do the guidelines single out gasping as a problem for bystanders? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.1 Recognition of Cardiac Arrest. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.

Adult CPR: compressions and breaths 14

  • A bystander is untrained or unwilling to give breaths to an adult in cardiac arrest. What do the guidelines call appropriate? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.2 Initiation of Resuscitation: Lay Rescuer. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • A rescuer counts 90 compressions in one minute on an adult. How does that compare with the guideline rate? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 7.3 Chest Compression Depth and Rate. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • A trained lay rescuer gives CPR with breaths to an adult. How are compressions and breaths combined? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 8.4 Compression-to-Ventilation Ratio. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • An injury makes it impossible to give breaths through an adult's mouth. What do the guidelines call reasonable? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 8.2 Ventilation During Adult Cardiac Arrest: Special Circumstances. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • For adult compressions, the heel of one hand goes on the center of the chest. Where does the other hand go? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 7.1 Positioning and Location for CPR. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • How deep should compressions go on an average adult? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 7.3 Chest Compression Depth and Rate. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • How long should each rescue breath for an adult take? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 8.1 Fundamentals of Ventilation. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • No neck injury is suspected. How does a trained lay rescuer open an unresponsive adult's airway? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.3 Opening the Airway. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What do the guidelines say about personal protective equipment during CPR on an adult? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.2 Initiation of Resuscitation: Lay Rescuer. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What do the guidelines say to lay rescuers who are trained in CPR about giving breaths to an adult? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 6.2 Initiation of Resuscitation: Lay Rescuer. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • What kind of surface do the guidelines prefer for adult CPR, when it does not delay compressions? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 7.1 Positioning and Location for CPR. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • Which is one of the five components of high-quality CPR on the American Heart Association's What is CPR? page? American Heart Association, What is CPR?, About High-Quality CPR. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • Which sequence describes a mouth-to-mouth breath in the guidelines? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 8.1 Fundamentals of Ventilation. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • Why do the guidelines suggest a regular breath, not a deep one, before giving a rescue breath? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 8.1 Fundamentals of Ventilation. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.

Child and infant CPR 11

  • A child is unresponsive. In the pediatric diagram for lay rescuers, what is the bystander told to do before starting CPR? 2025 AHA and AAP diagram, Pediatric BLS for Lay Rescuers, step 1, Call for Help. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • A lay rescuer finds a child who is unresponsive, not breathing normally and shows no signs of life. What do the guidelines direct? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 7.1 Initiation of CPR. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • A lay rescuer is unable or unwilling to give breaths to a child in cardiac arrest. What do the guidelines say? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 7.2 Components of High-Quality CPR. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • About how deep should compressions go on an infant? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 7.2 Components of High-Quality CPR. Outline: AHA Heartsaver CPR AED topic list, Infant CPR AED: Compressions, Breaths, and AED.
  • The child guidelines apply from about 1 year of age until when? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 4.1 Scope of the Guidelines. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • In the 2025 pediatric diagram for lay rescuers, what is used to compress an infant's chest? 2025 AHA and AAP diagram, Pediatric BLS for Lay Rescuers, step 2, Give Compressions and Breaths. Outline: AHA Heartsaver CPR AED topic list, Infant CPR AED: Compressions, Breaths, and AED.
  • In the pediatric diagram for lay rescuers, what follows every 30 compressions? 2025 AHA and AAP diagram, Pediatric BLS for Lay Rescuers, step 2, Give Compressions and Breaths. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • What compression rate do the guidelines give for infants and children? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 7.2 Components of High-Quality CPR. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • What should the rescuer let the chest do after each compression on a child? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 7.2 Components of High-Quality CPR. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • Which infant compression technique did the 2025 guidelines eliminate? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, Top 10 Take-Home Messages. Outline: AHA Heartsaver CPR AED topic list, Infant CPR AED: Compressions, Breaths, and AED.
  • Why do the guidelines encourage lay rescuers to give breaths to infants and children in cardiac arrest? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, Top 10 Take-Home Messages. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.

Using an AED 9

  • A woman in cardiac arrest is wearing a bra. What do the 2025 guidelines say about placing AED pads? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 9.1 Pads for Defibrillation in Adult Cardiac Arrest. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • The AED arrives while a bystander is giving CPR. What do the lay rescuer action steps say to do? 2025 AHA Lay Rescuer Action Steps (accessible version), Box 5. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • After following the AED prompts, how long does the lay rescuer resume CPR before the cycle repeats? 2025 AHA Lay Rescuer Action Steps (accessible version), Box 5. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • An AED is on its way. What do the guidelines recommend until it is applied? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 9.2 CPR Before Defibrillation. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • Only adult AED pads are available for a small child. What does the pediatric diagram for lay rescuers say? 2025 AHA and AAP diagram, Pediatric BLS for Lay Rescuers, step 3, Use the AED. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • What must AED pads touch to work? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 9.1 Pads for Defibrillation in Adult Cardiac Arrest. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • When does an AED deliver a shock? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 5 Major Concepts. Outline: AHA Heartsaver CPR AED topic list, Child CPR AED: Compressions, Breaths, and AED.
  • Which two interventions do the guidelines call the most important for outcomes in adult cardiac arrest? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 3 Preamble. Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.
  • Who should be able to use a public AED, according to the American Heart Association's What is CPR? page? American Heart Association, What is CPR?, Automated External Defibrillators (AED). Outline: AHA Heartsaver CPR AED topic list, Adult CPR AED: Compressions, Breaths, and AED.

Choking relief 10

  • A 6-year-old has a severe airway obstruction and is still responsive. What cycle do the guidelines give? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 6.3 Foreign-Body Airway Obstruction. Outline: AHA Heartsaver CPR AED topic list, Child Choking Relief.
  • A choking adult becomes unresponsive. What do the guidelines direct? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 10.2 Relief of FBAO in Unconscious Adult Patients. Outline: AHA Heartsaver CPR AED topic list, Adult Choking Relief.
  • A diner cannot speak or cough and is turning blue. After help is called, what do the 2025 guidelines have the rescuer give? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 10.1 Relief of FBAO in Conscious Adult Patients. Outline: AHA Heartsaver CPR AED topic list, Adult Choking Relief.
  • A woman in late pregnancy has a severe airway obstruction. What replaces abdominal thrusts? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 10.3 Relief of FBAO in Special Circumstances. Outline: AHA Heartsaver CPR AED topic list, Adult Choking Relief.
  • An adult is choking but coughing forcefully. What do the guidelines direct? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 10.1 Relief of FBAO in Conscious Adult Patients. Outline: AHA Heartsaver CPR AED topic list, Adult Choking Relief.
  • How do the pediatric guidelines tell a mild obstruction from a severe one? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 6.3 Foreign-Body Airway Obstruction. Outline: AHA Heartsaver CPR AED topic list, Child Choking Relief.
  • No object can be seen in a choking adult's mouth. What do the guidelines say about sweeping a finger through the mouth? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 10.2 Relief of FBAO in Unconscious Adult Patients. Outline: AHA Heartsaver CPR AED topic list, Adult Choking Relief.
  • The object comes out and the adult is breathing again. What do the guidelines say about emergency medical services? 2025 AHA Guidelines for CPR and ECC, Part 7: Adult Basic Life Support, section 10.1 Relief of FBAO in Conscious Adult Patients. Outline: AHA Heartsaver CPR AED topic list, Adult Choking Relief.
  • Which items do the pediatric guidelines list among the most common causes of choking in children? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 6.3 Foreign-Body Airway Obstruction. Outline: AHA Heartsaver CPR AED topic list, Child Choking Relief.
  • Which technique do the guidelines say not to use on a choking infant? 2025 AHA and AAP Guidelines for CPR and ECC, Part 6: Pediatric Basic Life Support, section 6.3 Foreign-Body Airway Obstruction. Outline: AHA Heartsaver CPR AED topic list, Infant Choking Relief.

Opioid emergencies and drowning 7

  • A lay rescuer finds an adult with a suspected opioid overdose who is unresponsive and not breathing normally. What do the guidelines direct? 2025 AHA Guidelines for CPR and ECC, Part 10: Adult and Pediatric Special Circumstances of Resuscitation, Adults and Children With Life-Threatening Opioid Overdose. Outline: AHA Heartsaver CPR AED topic list, Opioid-Associated Emergency.
  • A person in cardiac arrest after drowning has been removed from the water. What kind of CPR do the guidelines call for? 2025 AHA Guidelines for CPR and ECC, Part 10: Adult and Pediatric Special Circumstances of Resuscitation, section 11.5 CPR for Adults and Children in Cardiac Arrest Following Drowning. Outline: AHA Heartsaver CPR AED topic list, Water Competency and Drowning.
  • A rescuer is untrained or unable to give breaths to an adult in cardiac arrest after drowning. What do the guidelines call reasonable? 2025 AHA Guidelines for CPR and ECC, Part 10: Adult and Pediatric Special Circumstances of Resuscitation, section 11.5 CPR for Adults and Children in Cardiac Arrest Following Drowning. Outline: AHA Heartsaver CPR AED topic list, Water Competency and Drowning.
  • In cardiac arrest after drowning, what do the guidelines place before applying an AED? 2025 AHA Guidelines for CPR and ECC, Part 10: Adult and Pediatric Special Circumstances of Resuscitation, section 11.6 AED First vs CPR First. Outline: AHA Heartsaver CPR AED topic list, Water Competency and Drowning.
  • In the lay rescuer action steps, what is added when an opioid overdose is suspected? 2025 AHA Lay Rescuer Action Steps (accessible version), Box 6. Outline: AHA Heartsaver CPR AED topic list, Opioid-Associated Emergency.
  • What must a rescuer not delay while giving naloxone or waiting to see whether it works? 2025 AHA Guidelines for CPR and ECC, Part 10: Adult and Pediatric Special Circumstances of Resuscitation, Adults and Children With Life-Threatening Opioid Overdose. Outline: AHA Heartsaver CPR AED topic list, Opioid-Associated Emergency.
  • Who can administer naloxone, according to the 2025 guidelines? 2025 AHA Guidelines for CPR and ECC, Part 10: Adult and Pediatric Special Circumstances of Resuscitation, Top 10 Take-Home Messages. Outline: AHA Heartsaver CPR AED topic list, Opioid-Associated Emergency.

How this list was compiled: Our own questions for a lay rescuer, written to the topic list the American Heart Association publishes for its Heartsaver CPR AED course (Course Topics and Path List, Table 4, linked from https://cpr.heart.org/en/cpr-courses-and-kits/heartsaver, and https://cpr.heart.org/en/cpr-courses-and-kits/heartsaver/heartsaver-cpr-aed-training, both read 2026-10-07): adult CPR and AED, adult choking relief, opioid-associated emergency, water competency and drowning, heart attack and stroke, with child and infant CPR and choking relief as optional topics. Every fact was read on 2026-10-07 in the 2025 American Heart Association Guidelines for CPR and Emergency Cardiovascular Care on cpr.heart.org (Part 6, Part 7 and Part 10, published October 22, 2025, and the 2025 lay rescuer diagrams), the 2024 first aid guidelines, or the Association's public pages on CPR, the Chain of Survival and heart attack; each question names its source and section. Licence: Questions, choices and explanations are original work of this site.

How it works

This free CPR practice test has 67 questions of our own for lay rescuers: adult, child and infant CPR, AED use and choking. It is unofficial and not affiliated with, endorsed by or sponsored by the American Heart Association.

Read the full guide

What it covers

The questions follow the topic list of the Association's Heartsaver CPR AED course, read October 7, 2026. The bank holds 16 on recognizing an emergency, heart attack and stroke, 14 on adult CPR, 11 on children and infants, 9 on the AED, 10 on choking and 7 on opioid emergencies and drowning.

Where the answers come from

Each answer was read in the 2025 American Heart Association Guidelines for CPR and Emergency Cardiovascular Care, published October 22, 2025, or on a public page of the Association. The explanation names the source and section.

A quiz is not a course

A course completion card comes only from a course with hands-on practice and a skills test.

  • The 2025 guidelines give a choking adult cycles of 5 back blows, then 5 abdominal thrusts.
  • Two fingers are out for infant compressions: the 2025 guidelines use the heel of one hand or two thumbs.

Questions and answers

Is this a CPR practice test from the American Heart Association?

No. It is unofficial. The questions are our own; none is taken from or reworded from a course exam or workbook.

Is this a CPR and AED practice test?

Yes. Nine questions are on using an AED, from attaching the pads to resuming CPR, and the adult, child and infant questions cover compressions and breaths.

Can I use this to practice for a CPR written test?

Yes, as study. The Association's topic list marks the CPR AED topics as needing a skills test, and its public pages give no pass mark for a written test, so ask your Training Center what your class requires.

How many compressions and breaths are in one cycle of CPR?

30 compressions, then 2 breaths, for a lay rescuer giving CPR with breaths to an adult, a child or an infant (Part 7, section 8.4, and the 2025 pediatric diagram for lay rescuers).

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