BLS Practice Test: Video 3 Answers (25 Questions) — Questions and Answers

Question 1: A rescuer says 'I've given 1 mg epinephrine at 10:14' after administering the drug. This is an example of:

Knowledge sharing
Mutual respect
Closed-loop communication confirming task completion (Correct answer)
Assertive communication

Correct answer: Closed-loop communication confirming task completion

Reporting back the action taken and the time completes the closed-loop cycle and keeps all team members informed.

Question 2: When should a team member intervene if they believe the team leader is making an incorrect decision?

Only if two or more team members agree on the error
Only if they outrank the team leader
Immediately, using assertive but respectful communication (Correct answer)
Only after the resuscitation attempt has ended

Correct answer: Immediately, using assertive but respectful communication

Any team member who identifies a potential error should speak up immediately; patient safety supersedes hierarchy.

Question 3: What should a team member do if unsure about a task they were assigned?

Ask the team leader for clarification (Correct answer)
Do something else instead
Wait for someone else to help
Ignore the task

Correct answer: Ask the team leader for clarification

If a team member is unsure about an assigned task, it is crucial to seek clarification immediately from the team leader. Performing a task incorrectly due to uncertainty can jeopardize patient safety and disrupt the resuscitation effort. Asking for clarification ensures the task is understood and executed correctly, maintaining team efficiency and patient care standards.

Question 4: What role does the team leader play during a resuscitation attempt?

Assists with compressions
Directs and assigns tasks (Correct answer)
Operates the AED only
Waits to be assigned a task

Correct answer: Directs and assigns tasks

The team leader plays a crucial role in directing the resuscitation attempt by assigning specific tasks to team members, ensuring all necessary interventions are performed, and monitoring the overall progress. They maintain situational awareness, make critical decisions, and facilitate effective communication. This leadership allows the team to function cohesively and efficiently, maximizing the chances of a successful outcome.

Question 5: Which behavior supports effective team performance?

Team members communicate roles clearly (Correct answer)
Roles are undefined
Team members work independently
Everyone gives commands

Correct answer: Team members communicate roles clearly

Effective team performance in BLS relies heavily on clear role assignments and communication among members. When roles are clearly defined and communicated, it prevents duplication of effort, ensures all necessary tasks are covered, and promotes efficient coordination. This clarity allows the team to function smoothly, reducing chaos and improving the quality of care delivered.

Question 6: During a cardiac arrest, every minute without defibrillation for a shockable rhythm decreases survival by approximately how much?

25–30%
1–2%
15–20%
7–10% (Correct answer)

Correct answer: 7–10%

Survival from ventricular fibrillation decreases by approximately 7–10% for every minute that defibrillation is delayed without CPR.

Question 7: What can improve the effectiveness of the Chain of Survival?

More ambulances
Better CPR training for the public (Correct answer)
More medical tests
Longer response times

Correct answer: Better CPR training for the public

The early links of the Chain of Survival, such as recognition, activation, and early CPR, are often performed by bystanders. Widespread and effective CPR training for the public empowers more people to act quickly and correctly in an emergency. This significantly improves the chances of survival by ensuring critical interventions are started without delay, bridging the gap until professional help arrives.

Question 8: Which of the following actions is LEAST consistent with strengthening the 'rapid defibrillation' link?

Ensuring AED pads are replaced after each use
Training employees to use AEDs
Placing AEDs in high-traffic public areas
Storing AEDs in locked back rooms to prevent tampering (Correct answer)

Correct answer: Storing AEDs in locked back rooms to prevent tampering

AEDs stored in inaccessible locations cannot be retrieved quickly, undermining the rapid defibrillation link.

Question 9: A patient achieves return of spontaneous circulation (ROSC) after CPR and defibrillation. Which Chain of Survival link is now the priority?

Recognition and activation
Rapid defibrillation
Early CPR
Post-cardiac arrest care (Correct answer)

Correct answer: Post-cardiac arrest care

Post-cardiac arrest care, including targeted temperature management and hemodynamic support, begins after ROSC is achieved.

Question 10: In communities with strong Chain of Survival programs, survival rates from out-of-hospital cardiac arrest can reach:

40–50% (Correct answer)
Less than 5%
10–15% at most
Exactly 100%

Correct answer: 40–50%

Communities with robust bystander CPR, AED programs, and post-arrest care have demonstrated survival rates approaching 40–50% for shockable rhythms.

Question 11: When assessing breathing, how long should you take to determine if breathing is absent or abnormal?

30 seconds
Until a pulse check is completed separately
No more than 10 seconds (Correct answer)
At least 1 full minute

Correct answer: No more than 10 seconds

AHA guidelines state breathing should be assessed simultaneously with pulse check in under 10 seconds to minimize delay.

Question 12: When using a pocket mask for rescue breathing, where should you position yourself relative to the patient?

On the left side of the patient's torso
Directly above the patient's chest
At the patient's side near the head (Correct answer)
At the patient's feet

Correct answer: At the patient's side near the head

Positioning at the patient's side near the head allows proper mask seal and head-tilt with one or two hands.

Question 13: A 4-year-old child is in respiratory arrest with a pulse. What rescue-breathing rate should you use?

1 breath every 10 seconds
1 breath every 2–3 seconds (20–30/min) (Correct answer)
1 breath every 5–6 seconds (10–12/min)
2 breaths every 5 seconds

Correct answer: 1 breath every 2–3 seconds (20–30/min)

For infants and children with a pulse, AHA recommends 1 breath every 2–3 seconds (20–30 breaths/min).

Question 14: During two-rescuer BLS for an adult in cardiac arrest, how often should rescue breaths be given?

1 breath after every 15 compressions
2 breaths after every 30 compressions (Correct answer)
1 breath after every 30 compressions
2 breaths after every 15 compressions

Correct answer: 2 breaths after every 30 compressions

The 30:2 compression-to-ventilation ratio applies to adult BLS regardless of rescuer count.

Question 15: Which of the following is the MOST reliable indicator that rescue breaths are effective during BLS?

A beeping sound from the bag-mask valve
Increase in the patient's skin color
Decrease in the patient's heart rate
Visible chest rise with each breath (Correct answer)

Correct answer: Visible chest rise with each breath

Visible chest rise confirms air is entering the lungs rather than the stomach or leaking around the mask.

Question 16: In an unresponsive adult patient with no suspected spinal injury, which maneuver is preferred to open the airway?

Head-tilt chin-lift (Correct answer)
Neck extension only
Jaw thrust
Finger sweep

Correct answer: Head-tilt chin-lift

The head-tilt chin-lift is the preferred airway maneuver for unresponsive patients without suspected spinal injury.

Question 17: How often should rescue breaths be delivered during CPR with an advanced airway?

Every 5 seconds
Every 10 seconds
Every 3 seconds
Every 6 seconds (Correct answer)

Correct answer: Every 6 seconds

When an advanced airway (like an endotracheal tube or supraglottic airway) is in place during CPR, rescue breaths should be delivered asynchronously with chest compressions. The recommended rate is one breath every 6 seconds (10 breaths per minute). This allows for continuous chest compressions without interruption, optimizing blood flow while still providing adequate oxygenation.

Question 18: A bag-mask device should deliver approximately how much air volume per breath to an adult?

1200–1500 mL
200–300 mL
800–1000 mL
400–600 mL (Correct answer)

Correct answer: 400–600 mL

Each breath should deliver approximately 500–600 mL (roughly 400–600 mL range), enough to produce visible chest rise without causing gastric inflation.

Question 19: What is the most important consideration when using a bag-valve-mask?

Fast squeezing of the bag
Proper seal on the face (Correct answer)
Proper hand hygiene
High oxygen flow

Correct answer: Proper seal on the face

The most important consideration when using a bag-valve-mask (BVM) is achieving and maintaining a proper seal on the patient's face. A tight seal prevents air leakage, ensuring that the delivered breaths effectively enter the lungs and provide adequate ventilation. Without a good seal, breaths will be ineffective, regardless of other factors.

Question 20: A suspected spinal injury victim is unresponsive and not breathing. What airway technique should be used?

Jaw thrust without head tilt (Correct answer)
Neck hyperextension
Finger sweep to clear the airway
Head-tilt chin-lift

Correct answer: Jaw thrust without head tilt

The jaw thrust without head tilt is used for suspected spinal injury patients to open the airway while minimizing cervical spine movement.

Question 21: What should a rescuer do if the victim shows obvious signs of life during CPR?

Apply the AED and check for a shockable rhythm
Deliver two rescue breaths and then reassess
Stop compressions and reassess breathing and pulse (Correct answer)
Continue CPR for 2 more minutes to confirm ROSC

Correct answer: Stop compressions and reassess breathing and pulse

If signs of life appear (breathing, movement, coughing), compressions should stop and the rescuer should reassess pulse and breathing.

Question 22: How long should a rescuer take to check for a pulse before beginning CPR?

Up to 5 seconds
No more than 10 seconds (Correct answer)
30 seconds using both carotid and radial pulses
Up to 20 seconds to be certain

Correct answer: No more than 10 seconds

Pulse checks should take no more than 10 seconds; if no pulse is felt within that time, begin CPR.

Question 23: What should be done immediately after delivering a shock with an AED?

Deliver another shock
Resume CPR (Correct answer)
Check for a pulse
Wait for AED analysis

Correct answer: Resume CPR

Immediately after delivering a shock with an AED, the rescuer should resume chest compressions without delay. There should be no pause to check for a pulse or rhythm, as early resumption of compressions is critical to maintain blood flow to the brain and heart. The AED will re-analyze the rhythm after two minutes of CPR.

Question 24: A rescuer is performing CPR on an adult and the AED advises 'no shock recommended.' What should the rescuer do?

Stop CPR and wait for EMS to arrive
Immediately resume CPR beginning with chest compressions (Correct answer)
Check the victim's pulse for up to 30 seconds
Reattach the AED pads and re-analyze

Correct answer: Immediately resume CPR beginning with chest compressions

When the AED gives a 'no shock' message, the rescuer should immediately resume CPR starting with compressions.

Question 25: Which method is used to open the airway in an unresponsive victim without suspected trauma?

Jaw thrust
Head tilt–chin lift (Correct answer)
Neck tilt only
Chest thrust

Correct answer: Head tilt–chin lift

The head tilt–chin lift maneuver is the standard method for opening the airway in an unresponsive victim when there is no suspicion of spinal trauma. This technique lifts the tongue off the back of the throat, which is the most common cause of airway obstruction in an unconscious person. It ensures a clear path for air to enter the lungs.

BLS Practice Test: Video 3 Answers (25 Questions)

A rescuer says 'I've given 1 mg epinephrine at 10:14' after administering the drug.
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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

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