CPR Practice Test: Video 5 Answers (23 Questions) — Questions and Answers

Question 1: Which technique is preferred for two-rescuer infant CPR?

Two thumb-encircling hands technique (Correct answer)
One-hand heel technique
Two-finger technique
Five-finger technique

Correct answer: Two thumb-encircling hands technique

The two thumb-encircling hands technique is preferred for two-rescuer infant CPR because it produces better perfusion.

Question 2: How should AED pads be placed if a patient has an implanted pacemaker under the pad site?

Only on the back
Do not use the AED
At least 1 inch away from the implanted device (Correct answer)
Directly over the device

Correct answer: At least 1 inch away from the implanted device

Place pads at least 1 inch from an implanted device to avoid blocking the shock.

Question 3: After ROSC, what is the recommended target for arterial oxygen saturation (SpO2)?

90-94%
94-98% (Correct answer)
100% (maximum)
98-100%

Correct answer: 94-98%

Post-ROSC, target SpO2 of 92-98% (or 94-98%) to avoid both hypoxia and hyperoxia, which are both harmful.

Question 4: What is the single-rescuer compression-to-ventilation ratio for a child or infant?

30:2 (Correct answer)
15:2
10:2
5:1

Correct answer: 30:2

A lone rescuer uses 30:2 for children and infants, the same as for adults.

Question 5: In the BLS healthcare provider algorithm, after delivering a shock with an AED, the rescuer should immediately:

Resume CPR starting with chest compressions (Correct answer)
Wait 2 minutes before touching the patient
Check the pulse for 10 seconds
Deliver a second shock

Correct answer: Resume CPR starting with chest compressions

Immediately after an AED shock, CPR should resume starting with chest compressions without checking the pulse first.

Question 6: What is the recommended depth of chest compressions for an adult during CPR?

As deep as possible past 2.4 inches
At least 3 inches (7.5 cm)
About 1 inch (2.5 cm)
At least 2 inches (5 cm) (Correct answer)

Correct answer: At least 2 inches (5 cm)

Adult compressions should be at least 2 inches (5 cm) but not exceeding 2.4 inches (6 cm).

Question 7: Where should your hands be placed for adult chest compressions?

Over the soft area below the rib cage
Center of the chest on the lower half of the breastbone (Correct answer)
Over the left nipple directly above the heart
On the upper third of the sternum

Correct answer: Center of the chest on the lower half of the breastbone

Place the heel of your hand on the lower half of the sternum at the center of the chest.

Question 8: What is the compression-to-ventilation ratio for one-rescuer adult CPR?

10 compressions to 2 breaths
30 compressions to 2 breaths (Correct answer)
15 compressions to 2 breaths
5 compressions to 1 breath

Correct answer: 30 compressions to 2 breaths

Single-rescuer adult CPR uses a 30:2 compression-to-ventilation ratio.

Question 9: Why is early coronary reperfusion important after cardiac arrest?

To restore heart function (Correct answer)
To avoid CPR
To restart breathing
To reduce chest pain

Correct answer: To restore heart function

Early coronary reperfusion, typically through procedures like angioplasty or stenting, is critical if the cardiac arrest was caused by a heart attack (coronary artery blockage). Restoring blood flow to the heart muscle as quickly as possible helps to limit myocardial damage, improve cardiac function, and prevent further life-threatening arrhythmias, thereby improving survival and recovery.

Question 10: What is the recommended timing before making a firm neurological prognosis in a comatose survivor?

At least 72 hours after ROSC (Correct answer)
After 10 minutes
Within 1 hour of ROSC
Immediately on arrival

Correct answer: At least 72 hours after ROSC

Prognostication should generally wait at least 72 hours to avoid premature, inaccurate conclusions.

Question 11: Why should a 12-lead ECG be obtained quickly after ROSC?

To measure body temperature
To detect a STEMI needing emergency catheterization (Correct answer)
To assess kidney function
To check oxygen saturation

Correct answer: To detect a STEMI needing emergency catheterization

A 12-lead ECG identifies STEMI, which may require urgent coronary angiography and intervention.

Question 12: Why is fever prevention important in the days after cardiac arrest?

Fever lowers oxygen need
Fever improves brain healing
Fever increases metabolic demand and worsens brain injury (Correct answer)
Fever has no effect

Correct answer: Fever increases metabolic demand and worsens brain injury

Elevated temperature raises the brain's oxygen demand and can extend neurological damage.

Question 13: Which best describes the purpose of cardiac rehabilitation after a survived cardiac arrest?

A method to induce arrest
An immediate emergency treatment
A surgical procedure
Supervised recovery of physical and cardiac function (Correct answer)

Correct answer: Supervised recovery of physical and cardiac function

Cardiac rehabilitation provides supervised exercise and education to restore function and reduce future risk.

Question 14: What is the best method to give chest compressions to an infant with two rescuers?

Two-thumb encircling hands (Correct answer)
Heel of one hand
Two-finger technique
One-finger technique

Correct answer: Two-thumb encircling hands

The best method to give chest compressions to an infant with two rescuers is the two-thumb encircling hands technique. This method provides deeper and more consistent compressions compared to the two-finger technique. It also allows for better support of the infant's back, improving overall compression quality and blood flow.

Question 15: What is the correct compression-to-ventilation ratio for single-rescuer CPR on an adult?

20:2
15:2
30:2 (Correct answer)
5:1

Correct answer: 30:2

For single-rescuer CPR on an adult, the correct compression-to-ventilation ratio is 30:2. This ratio prioritizes continuous, high-quality chest compressions to maintain vital blood flow. The two rescue breaths are delivered quickly after 30 compressions to minimize interruptions.

Question 16: Which action ensures effective rescue breaths?

Blow continuously
Give rapid short puffs
Look for chest rise (Correct answer)
Use nasal breaths only

Correct answer: Look for chest rise

Looking for chest rise is the primary visual indicator that a rescue breath has successfully entered the victim's lungs. This confirms that the airway is open and air is being delivered, which is essential for oxygenating the blood. Without visible chest rise, the breath is ineffective, and the rescuer should re-adjust the airway and try again.

Question 17: How often should you switch roles when performing two-person CPR?

After each shock
Every 5 minutes
Only when tired
Every 2 minutes (Correct answer)

Correct answer: Every 2 minutes

When performing two-person CPR, you should switch roles every 2 minutes, or after approximately 5 cycles of compressions and ventilations. This regular rotation helps prevent rescuer fatigue, ensuring that high-quality chest compressions are maintained. Consistent, effective compressions are crucial for maximizing blood flow to the brain and heart.

Question 18: How long should an interruption in chest compressions ideally last?

Less than 10 seconds (Correct answer)
About 30 seconds
Up to 1 minute
As long as needed to think

Correct answer: Less than 10 seconds

Interruptions should be minimized to under 10 seconds to maintain blood flow.

Question 19: How should you treat a minor burn?

Pop any blisters
Cover it with butter
Cool it with running water (Correct answer)
Apply ice directly

Correct answer: Cool it with running water

Cool running water reduces heat and pain without damaging the skin further.

Question 20: What is the first step in treating someone in shock?

Make them walk it off
Lay them down and elevate the legs (Correct answer)
Have them stand up
Give them food

Correct answer: Lay them down and elevate the legs

Lying down with legs elevated improves blood flow to vital organs.

Question 21: What is the recommended way to clean a minor wound before bandaging?

Scrub with bleach
Rinse with clean running water and mild soap around it (Correct answer)
Pour rubbing alcohol directly into the wound
Leave all dirt in place

Correct answer: Rinse with clean running water and mild soap around it

Rinse a minor wound with clean running water and clean around it with mild soap.

Question 22: When giving an infant or child artificial respiration for two minutes, how many breaths or seconds do you give them?

2 breaths/ 3 seconds
2 breaths/ 5 seconds
1 breath/ 3 seconds (Correct answer)
1 breath/ 5 seconds

Correct answer: 1 breath/ 3 seconds

For infants and children requiring artificial respiration, the recommended rate is one breath every 3 seconds. This translates to approximately 20 breaths per minute, which is a faster rate than for adults. This guideline ensures adequate oxygenation without over-ventilation, reflecting their higher metabolic rate and respiratory needs.

Question 23: What is the first action to control severe external bleeding from a leg wound?

Elevate the leg and wait
Apply a tourniquet immediately
Give the person water
Apply direct pressure to the wound (Correct answer)

Correct answer: Apply direct pressure to the wound

Direct pressure with a clean cloth is the first and most effective step to control most external bleeding.

CPR Practice Test: Video 5 Answers (23 Questions)

Which technique is preferred for two-rescuer infant CPR?

What Practice Test Geeks adds beyond an AI chat for CPR

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

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redcross.org — Score validity, renewal, test delivery, passing score · verified Oct 2026
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