First Aid and CPR Practice Test (US) 2026：第2套练习测试

First Aid and CPR Practice Test (US) 练习测试第2套（共5套）：再练25道题，附答案和解释。

急救
美国
120道题
核对于2026年10月10日

第1题，共25题
You are giving CPR to a person with obesity. What do the 2025 AHA guidelines say?
- Push on the belly instead of the chest to avoid the ribs
- Give rescue breaths only, because compressions will not work
- Use gentler, shallower compressions than for other adults
- Use standard technique, pushing harder if needed to reach the right depth
显示答案
答案: D. Use standard technique, pushing harder if needed to reach the right depth
Use standard CPR technique and consider more force to reach adequate depth.
第2题，共25题
What changed about the Chain of Survival in the 2025 AHA guidelines?
- One Universal Chain of Survival now covers adults and children
- The Chain of Survival was removed from the guidelines
- The chain now starts with giving rescue breaths first
- There are now separate chains for every age group
显示答案
答案: A. One Universal Chain of Survival now covers adults and children
The 2025 guidelines use a single Universal Chain of Survival for pediatric and adult cardiac arrest.
第3题，共25题
When you begin CPR on an adult in cardiac arrest, what do you start with?
- Two rescue breaths
- A pulse check for 1 minute
- Sitting the person up
- Chest compressions
显示答案
答案: D. Chest compressions
CPR for lay rescuers starts with chest compressions, then adds breaths if you are trained and willing.
第4题，共25题
In CPR guidelines, who counts as an infant?
- A child younger than about 5 years, before school starts
- A child younger than about 3 years, including toddlers
- Any child who is still too young to walk on their own
- A baby younger than about 1 year, not counting newborns
显示答案
答案: D. A baby younger than about 1 year, not counting newborns
Infants are younger than about 1 year, not counting newly born babies.
第5题，共25题
For CPR, when should you treat a young person as an adult instead of a child?
- Once they can talk
- Once they weigh more than 50 pounds (about 23 kg)
- On their 8th birthday
- Once they show signs of puberty
显示答案
答案: D. Once they show signs of puberty
Child CPR applies from about 1 year until puberty. After puberty, use adult CPR.
第6题，共25题
How deep should chest compressions be for an infant?
- About 1.5 inches (4 cm), at least one-third of the chest depth
- About 2.4 inches (6 cm), the same as for an adult
- About 3 inches (7.5 cm), half the depth of the chest
- About 0.5 inch (1 cm), just enough to see the chest move
显示答案
答案: A. About 1.5 inches (4 cm), at least one-third of the chest depth
Push at least one-third of the chest depth, about 1.5 inches (4 cm) for infants.
第7题，共25题
How deep should chest compressions be for a child?
- About 4 inches (10 cm), as deep as you can go
- About 1 inch (2.5 cm), one-tenth of the chest depth
- About 2 inches (5 cm), at least one-third of the chest depth
- About 3 inches (7.5 cm), half of the chest depth
显示答案
答案: C. About 2 inches (5 cm), at least one-third of the chest depth
For children, push at least one-third of the chest depth, about 2 inches (5 cm).
第8题，共25题
Which infant compression technique did the 2025 AHA guidelines stop recommending?
- The two-finger technique
- Compressions on a firm surface
- The heel of one hand
- The two-thumb encircling-hands technique
显示答案
答案: A. The two-finger technique
Use the heel of one hand or the two-thumb encircling-hands technique. The two-finger technique is no longer recommended.
第9题，共25题
You cannot wrap your hands around an infant's chest. Which compression technique should you use?
- The heel of one hand
- Two fingers
- The heels of both hands
- Your fist
显示答案
答案: A. The heel of one hand
If you cannot encircle the chest, use the heel of one hand on the breastbone.
第10题，共25题
What compression-to-breath ratio does a single rescuer use for a child or infant?
- 5:1
- 30:2
- 3:1
- 15:1
显示答案
答案: B. 30:2
A single rescuer uses 30:2. Two rescuers, usually health care providers, use 15:2.
第11题，共25题
Why are rescue breaths encouraged when giving CPR to children and infants?
- Children's chests are too small and soft to receive any compressions
- Breaths replace the need to call 911 for a child
- Breaths are easier to give than compressions for a child
- Breaths plus compressions improve survival in children and infants
显示答案
答案: D. Breaths plus compressions improve survival in children and infants
For out-of-hospital cardiac arrest in infants and children, breaths plus compressions improve survival.
第12题，共25题
You are unable or unwilling to give breaths to a child in cardiac arrest. What should you do?
- Do nothing until EMS arrives and takes over
- Shake the child firmly to try to wake them before trying anything else
- Give compression-only CPR rather than doing nothing
- Give breaths only, even though you are unwilling
显示答案
答案: C. Give compression-only CPR rather than doing nothing
Compression-only CPR is reasonable if a lay rescuer cannot give breaths.
第13题，共25题
An AED for a 4-year-old has pediatric pads or a pediatric setting available. What should you do?
- Wait to use the AED until the paramedics arrive
- Do not use an AED at all on a child this young
- Use the adult pads, because they give a stronger and more useful shock
- Use the pediatric pads or setting, because the child is under 8
显示答案
答案: D. Use the pediatric pads or setting, because the child is under 8
For infants and children under 8, use a pediatric attenuator and pediatric pads if available.
第14题，共25题
No pediatric pads are available for a 3-year-old in cardiac arrest. What should you do?
- Use the adult pads, making sure they do not touch
- Place both pads side by side on the belly
- Do not use the AED until child pads arrive
- Cut the adult pads in half with scissors so they fit the small chest
显示答案
答案: A. Use the adult pads, making sure they do not touch
Use the largest pads that fit while keeping good separation. Placing one pad on the front and one on the back can help.
第15题，共25题
Pad 1 in the diagram goes on an adult's bare chest. Where?
- On the upper right chest, just below the collarbone
- On the right side of the neck
- On the belly button
- On the upper left chest, directly over the heart and the left nipple
显示答案
答案: A. On the upper right chest, just below the collarbone
In the usual position, one pad goes on the upper right chest below the collarbone.
第16题，共25题
Where does pad 2 go?
- On the lower right side of the belly, just above the right hip
- On the top of the left shoulder
- On the left upper arm
- On the lower left side of the chest, below the armpit
显示答案
答案: D. On the lower left side of the chest, below the armpit
The second pad goes on the lower left side so the shock crosses the heart.
第17题，共25题
Besides the front-and-side position, what other AED pad position do the AHA guidelines allow?
- One pad on each thigh, just above the knees
- One pad on the front of the chest and one on the back
- Both pads side by side in the middle of the back
- Both pads on the same upper arm, one above the other
显示答案
答案: B. One pad on the front of the chest and one on the back
Pads may be placed anterolateral (front and side) or anteroposterior (front and back).
第18题，共25题
The person is wearing a bra that is in the way of an AED pad. What can you do?
- Skip the AED and keep doing CPR only
- Place the pad directly on top of the bra fabric
- Put the pad on the belly below the bra instead
- Move the bra aside instead of removing it, if the pad then fits
显示答案
答案: D. Move the bra aside instead of removing it, if the pad then fits
The guidelines note a bra can be adjusted rather than removed to place the pads on bare skin.
第19题，共25题
The AED is analyzing the rhythm or about to deliver a shock. What should everyone do?
- Lift the person's head
- Hold the person's hand so they know someone is with them
- Stay clear and not touch the person
- Keep giving compressions
显示答案
答案: C. Stay clear and not touch the person
Touching the person can affect the analysis and is unsafe during a shock.
第20题，共25题
The AED has just delivered a shock to an adult. What is your next step?
- Remove the AED pads so they do not get in the way
- Check the pulse at the neck for a full minute
- Resume chest compressions right away
- Wait 2 minutes before doing anything else
显示答案
答案: C. Resume chest compressions right away
Resume compressions immediately after a shock and follow the AED prompts.
第21题，共25题
An AED is on its way but not there yet. What should you do?
- Give CPR until the AED arrives and is applied
- Give only rescue breaths
- Leave to find the AED yourself and stop CPR for 5 minutes
- Wait for the AED before starting anything
显示答案
答案: A. Give CPR until the AED arrives and is applied
CPR is recommended until a defibrillator or AED is applied.
第22题，共25题
An adult is choking but is coughing forcefully. What should you do?
- Give abdominal thrusts right away to clear the airway
- Give them a glass of water so they can wash the food down their throat
- Do a finger sweep to try to find the object
- Let them keep coughing and watch for signs it is getting worse
显示答案
答案: D. Let them keep coughing and watch for signs it is getting worse
With a mild obstruction, let the person cough and watch for signs of severe obstruction.
第23题，共25题
A person clutches their throat and cannot speak or cough. What does this usually mean?
- They have a bad sore throat from a cold
- They are asking for a drink of water
- Their airway is blocked and they cannot breathe
- They are about to sneeze or cough hard and need some space
显示答案
答案: C. Their airway is blocked and they cannot breathe
Clutching the throat and being unable to speak or cough are signs of severe choking.
第24题，共25题
Under the 2025 AHA guidelines, how should you help an adult with severe choking?
- A slap on the face to make the person cough harder
- 30 chest compressions while the person is still standing up
- 5 back blows, then 5 abdominal thrusts, repeated until the object comes out
- Abdominal thrusts only, as many as needed, with no back blows
显示答案
答案: C. 5 back blows, then 5 abdominal thrusts, repeated until the object comes out
Severe choking in adults: repeated cycles of 5 back blows followed by 5 abdominal thrusts.
第25题，共25题
What should you do about 911 when an adult has severe choking?
- Activate the emergency response system (call 911)
- Call 911 only if the object is still stuck after 20 minutes
- Never call 911 for choking
- Call 911 only if the person dies
显示答案
答案: A. Activate the emergency response system (call 911)
The guidelines say to activate the emergency response system for severe airway obstruction.

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