BLS Pretest Chapter 1: General Concepts of Basic Life Support

BLS Pretest Chapter 1: General Concepts of Basic Life Support Quiz Questions Answers with explanation. This Basic Life Support (BLS) Chapter 1 Practice test is based on the later American Heart Association (AHA) guideline.

BLS Pretest Chapter 1: General Concepts of Basic Life Support

Which of the following is the first link in the adult Chain of Survival?

  • (A) Early defibrillation
  • (B) Early advanced care
  • (C) Early CPR
  • (D) Early recognition and activation of the emergency response system

View Answer
Answer: (D) Explanation: Early recognition and activation of the emergency response system is crucial as it ensures that help is on the way and increases the chances of survival.

What is the second step in the adult Chain of Survival?

  • (A) Early CPR
  • (B) Early defibrillation
  • (C) Post-cardiac arrest care
  • (D) Advanced life support

View Answer
Answer: (A) Explanation: Early CPR is the second step and is critical for maintaining blood flow to the brain and vital organs until defibrillation can be performed.

The final link in the Chain of Survival focuses on:

  • (A) Early defibrillation
  • (B) Advanced life support
  • (C) Post-cardiac arrest care
  • (D) Calling 911

View Answer
Answer: (C) Explanation: Post-cardiac arrest care is vital for the recovery and long-term survival of cardiac arrest patients.

What is the recommended chest compression rate for adult CPR according to the 2015 guidelines?

  • (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 2015 guidelines recommend a compression rate of 100-120 compressions per minute to ensure adequate blood flow during CPR.

According to the 2015 BLS guidelines, the depth of chest compressions for adults should be:

  • (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 major change was made in the 2010 BLS guidelines?

  • (A) Airway, Breathing, Compressions (ABC) was changed to Compressions, Airway, Breathing (CAB)
  • (B) The use of AEDs was discouraged
  • (C) Chest compressions were removed from the protocol
  • (D) Ventilations were prioritized over compressions

View Answer
Answer: (A) Explanation: The change to CAB emphasizes the importance of chest compressions in the initial response.

When performing adult CPR, how often should rescuers switch roles 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 roles every 2 minutes to ensure high-quality chest compressions are maintained.

When performing one-rescuer CPR on an adult, the compression to ventilation ratio is:

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

View Answer
Answer: (D) Explanation: The recommended ratio for one-rescuer CPR is 30 compressions to 2 ventilations.

If an adult victim has a pulse but is not breathing, you should:

  • (A) Start chest compressions immediately
  • (B) Perform abdominal thrusts
  • (C) Provide rescue breaths
  • (D) Check the blood pressure

View Answer
Answer: (C) Explanation: If the victim has a pulse but is not breathing, providing rescue breaths helps maintain oxygenation.

In two-rescuer CPR for adults, the role of the second rescuer is to:

  • (A) Call 911
  • (B) Perform chest compressions
  • (C) Provide ventilations and operate the AED
  • (D) Check for a pulse

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

When using a pocket mask for mouth-to-mask ventilation, you should:

  • (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.

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.

The correct hand placement for chest compressions in adults is:

  • (A) On the upper half of the breastbone
  • (B) On the lower half of the breastbone, between the nipples
  • (C) Just above the navel
  • (D) On the left side of the chest

View Answer
Answer: (B) Explanation: Hand placement on the lower half of the breastbone ensures effective chest compressions.

What is the recommended compression depth for adult CPR?

  • (A) At least 1 inch
  • (B) At least 1.5 inches
  • (C) At least 2 inches
  • (D) At least 2.5 inches

View Answer
Answer: (C) Explanation: Compressions should be at least 2 inches deep to ensure adequate perfusion.

When should an AED be applied during an adult cardiac arrest?

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

View Answer
Answer: (A) Explanation: The AED should be applied as soon as it is available to increase the chances of survival.

What is the primary purpose of chest compressions during CPR?

  • (A) To clear the airway
  • (B) To restart the heart
  • (C) To circulate blood to the brain and vital organs
  • (D) To provide oxygen to the lungs

View Answer
Answer: (C) Explanation: Chest compressions help circulate blood to the brain and vital organs, maintaining life until advanced care can be provided.

In adult CPR, how often should you check for signs of life and a pulse?

  • (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.

When performing CPR on an adult, you should minimize interruptions to:

  • (A) 10 seconds or less
  • (B) 20 seconds or less
  • (C) 30 seconds or less
  • (D) 1 minute or less

View Answer
Answer: (A) Explanation: Minimizing interruptions to 10 seconds or less ensures continuous blood flow and improves the chances of survival.

What is the correct sequence of steps for using an AED?

  • (A) Power on the AED, attach electrode pads, analyze the rhythm, deliver a shock
  • (B) Power on the AED, analyze the rhythm, attach electrode pads, deliver a shock
  • (C) Attach electrode pads, power on the AED, analyze the rhythm, deliver a shock
  • (D) Analyze the rhythm, power on the AED, attach electrode pads, deliver a shock

View Answer
Answer: (A) Explanation: The correct sequence ensures that the AED is ready to deliver a shock as soon as a shockable rhythm is detected.

What is the recommended rate of compressions per minute in 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: A rate of 100-120 compressions per minute helps maintain adequate circulation during CPR.

How long should each breath be delivered during rescue breathing in adult CPR?

  • (A) 0.5 seconds
  • (B) 1 second
  • (C) 1.5 seconds
  • (D) 2 seconds

View Answer
Answer: (B) Explanation: Each breath should be delivered over 1 second to ensure adequate ventilation without causing gastric inflation.

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 call for additional help during a CPR event?

  • (A) Immediately after starting chest compressions
  • (B) After delivering the first two rescue breaths
  • (C) As soon as you recognize the victim is unresponsive and not breathing
  • (D) Only if the AED indicates a shock is needed

View Answer
Answer: (C) Explanation: Calling for additional help as soon as you recognize the emergency ensures timely assistance and advanced care.

During two-rescuer CPR, what is the role of the rescuer performing ventilations?

  • (A) To check for a pulse
  • (B) To provide compressions
  • (C) To ensure chest rise with each breath
  • (D) To apply the AED pads

View Answer
Answer: (C) Explanation: The rescuer providing ventilations should ensure that each breath results in visible chest rise, indicating effective ventilation.

In an adult victim, what is the recommended action if you find a weak pulse but the victim 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.

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