BLS Pretest Chapter 2 BLS for Adults Quiz: Questions, Answers

BLS Pretest Chapter 2 BLS for Adults Quiz: Questions, Answers with explanation. This Basic Life Support (BLS) Chapter 2 Practice test is based on the later American Heart Association (AHA) guideline.

BLS Pretest Chapter 2 BLS for Adults

What is the correct sequence of actions for BLS in an adult?

  • (A) Assess responsiveness, call for help, start CPR, use AED
  • (B) Call for help, assess responsiveness, use AED, start CPR
  • (C) Start CPR, use AED, call for help, assess responsiveness
  • (D) Use AED, start CPR, assess responsiveness, call for help

View Answer
Answer: (A) Explanation: The correct sequence for BLS is to assess responsiveness, call for help, start CPR, and use the AED as soon as it arrives.

What is the recommended compression rate for adult CPR?

  • (A) 60-80 compressions per minute
  • (B) 80-100 compressions per minute
  • (C) 100-120 compressions per minute
  • (D) 120-140 compressions per minute

View Answer
Answer: (C) Explanation: The recommended compression rate is 100-120 compressions per minute to ensure adequate blood flow during CPR.

What is the correct depth for chest compressions on an adult?

  • (A) At least 1 inch
  • (B) At least 2 inches
  • (C) At least 3 inches
  • (D) At least 4 inches

View Answer
Answer: (B) Explanation: Chest compressions should be at least 2 inches deep to be effective.

What is the recommended compression to ventilation ratio for adult CPR?

  • (A) 30:1
  • (B) 30:2
  • (C) 15:1
  • (D) 15:2

View Answer
Answer: (B) Explanation: The recommended ratio is 30 compressions to 2 ventilations for adult CPR.

Where should you check for a pulse in an unresponsive adult?

  • (A) Radial artery
  • (B) Brachial artery
  • (C) Carotid artery
  • (D) Femoral artery

View Answer
Answer: (C) Explanation: The carotid artery is the preferred site for checking a pulse in an unresponsive adult.

One-Rescuer BLS/CPR for Adults

When performing one-rescuer CPR on an adult, how often should you switch tasks to prevent fatigue?

  • (A) Every 1 minute
  • (B) Every 2 minutes
  • (C) Every 5 minutes
  • (D) Every 10 minutes

View Answer
Answer: (B) Explanation: Rescuers should switch tasks every 2 minutes to prevent fatigue and maintain high-quality compressions.

What is the first step in one-rescuer BLS for an adult?

  • (A) Start chest compressions
  • (B) Check for breathing
  • (C) Call for help
  • (D) Check for a pulse

View Answer
Answer: (C) Explanation: The first step is to call for help to activate the emergency response system.

Two-Rescuer BLS/CPR for Adults

In two-rescuer CPR for adults, how often should rescuers switch roles?

  • (A) Every 1 minute
  • (B) Every 2 minutes
  • (C) Every 5 minutes
  • (D) Every 10 minutes

View Answer
Answer: (B) Explanation: Rescuers should switch roles every 2 minutes to ensure high-quality compressions are maintained.

What is the role of the second rescuer in two-rescuer adult CPR?

  • (A) Perform chest compressions
  • (B) Check for a pulse
  • (C) Provide ventilations and operate the AED
  • (D) Call for help

View Answer
Answer: (C) Explanation: The second rescuer provides ventilations and operates the AED while the first rescuer performs chest compressions.

Adult Mouth-to-Mask Ventilation

When using a pocket mask for mouth-to-mask ventilation, what should you ensure?

  • (A) Blow as hard as possible
  • (B) Use a compression to ventilation ratio of 15:1
  • (C) Ensure a tight seal and deliver each breath over 1 second
  • (D) Alternate breaths between rescuers

View Answer
Answer: (C) Explanation: Ensuring a tight seal and delivering each breath over 1 second helps achieve adequate ventilation.

Adult Bag-Mask Ventilation

During bag-mask ventilation in two-rescuer CPR, the rescuer providing ventilations should:

  • (A) Deliver one breath every 3-5 seconds
  • (B) Deliver one breath every 5-6 seconds
  • (C) Deliver one breath every 10 seconds
  • (D) Deliver one breath every 15 seconds

View Answer
Answer: (B) Explanation: Delivering one breath every 5-6 seconds helps ensure proper oxygenation without hyperventilation.

Self-Assessment for Adult BLS

What is the first step in the assessment of an individual found “down”?

  • (A) Check their blood pressure
  • (B) Check their heart rate
  • (C) Check to see if they are conscious or unconscious
  • (D) Check their pupil size

View Answer
Answer: (C) Explanation: The first step is to check if the individual is conscious or unconscious, as this will determine the next steps in the BLS assessment.

What is a critical factor in any emergency situation?

  • (A) Scene safety
  • (B) Age of the individual
  • (C) Resuscitation status
  • (D) Pregnancy status

View Answer
Answer: (A) Explanation: Scene safety is always the first priority to ensure the rescuer does not become injured.

How did the BLS guidelines change with the recent AHA update?

  • (A) Ventilations are performed before compressions
  • (B) ABC is now CAB
  • (C) Use of an AED is no longer recommended
  • (D) Rapid transport is recommended over on-scene CPR

View Answer
Answer: (B) Explanation: The focus is on early intervention and starting CPR. The sequence changed from ABC (Airway, Breathing, Compressions) to CAB (Compressions, Airway, Breathing).

What is the proper order of steps for the BLS Chain of Survival?

  • (A) Look, listen, and feel
  • (B) Check responsiveness, call EMS and get AED, defibrillation, and circulation
  • (C) Check responsiveness, call EMS and get AED, chest compressions, and early defibrillation
  • (D) Call for help, shock, check pulse, shock, and transport

View Answer
Answer: (C) Explanation: The correct order focuses on early CPR and defibrillation to improve the chances of survival.

What is the first action to take after activating EMS and sending someone for an AED in one-rescuer BLS?

  • (A) Start rescue breathing
  • (B) Apply AED pads
  • (C) Run to get help
  • (D) Begin chest compressions

View Answer
Answer: (D) Explanation: The first action is to begin chest compressions to maintain circulation until the AED arrives.

How often should you check for signs of life and a pulse during adult CPR?

  • (A) Every 30 seconds
  • (B) Every 1 minute
  • (C) Every 2 minutes
  • (D) Every 5 minutes

View Answer
Answer: (C) Explanation: Checking for signs of life and a pulse every 2 minutes helps determine if CPR is effective and if further actions are needed.

What should you do if the AED indicates a shock is advised?

  • (A) Continue CPR
  • (B) Deliver the shock immediately
  • (C) Check for a pulse
  • (D) Start rescue breathing

View Answer
Answer: (B) Explanation: If the AED indicates a shock is advised, deliver the shock immediately to attempt to restore a normal heart rhythm.

How should you handle an adult victim with a suspected neck injury when opening the airway?

  • (A) Use the head-tilt/chin-lift maneuver
  • (B) Use the jaw-thrust maneuver without head extension
  • (C) Use the abdominal thrust maneuver
  • (D) Use the tongue-jaw lift maneuver

View Answer
Answer: (B) Explanation: For victims with a suspected neck injury, the jaw-thrust maneuver without head extension is recommended to avoid further injury.

What is the purpose of allowing complete chest recoil after each compression?

  • (A) To increase the rate of compressions
  • (B) To allow the heart to refill with blood
  • (C) To reduce fatigue in the rescuer
  • (D) To enhance airway patency

View Answer
Answer: (B) Explanation: Complete chest recoil allows the heart to refill with blood, ensuring effective circulation during CPR.

When should you use an AED during adult CPR?

  • (A) Only after 5 minutes of CPR
  • (B) As soon as it is available
  • (C) After giving 2 rescue breaths
  • (D) Only if the victim is unresponsive and not breathing

View Answer
Answer: (B) Explanation: An AED should be used as soon as it is available to increase the chances of survival.

What is the recommended action if you find a weak pulse in an adult victim who is not breathing?

  • (A) Start chest compressions immediately
  • (B) Provide rescue breaths
  • (C) Apply the AED
  • (D) Check for a medical alert bracelet

View Answer
Answer: (B) Explanation: Providing rescue breaths helps maintain oxygenation in a victim with a pulse but no breathing.

Adult BLS Algorithm

What is the first action to take when you find an unresponsive adult with no breathing or only gasping?

  • (A) Start rescue breathing
  • (B) Start chest compressions
  • (C) Apply the AED
  • (D) Call for help

View Answer
Answer: (D) Explanation: The first action is to call for help to activate the emergency response system.

When should rescuers switch roles during adult CPR to minimize fatigue?

  • (A) Every 30 seconds
  • (B) Every 1 minute
  • (C) Every 2 minutes
  • (D) Every 5 minutes

View Answer
Answer: (C) Explanation: Rescuers should switch roles every 2 minutes to maintain high-quality compressions.

What is the correct compression to ventilation ratio for two-rescuer adult CPR?

  • (A) 30:1
  • (B) 30:2
  • (C) 15:1
  • (D) 15:2

View Answer
Answer: (B) Explanation: The correct ratio for two-rescuer adult CPR is 30 compressions to 2 ventilations.

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