2026 BLS Mock Test - Basic Life Support
Questions And Answers Exam (25 Key
Questions)
Question one.
What is the immediate first action a rescuer should take upon arriving at a potential emergency
scene?
A. Begin chest compressions.
B. Activate the emergency response system.
C. Ensure scene safety.
D. Check for responsiveness.
Answer. C. Ensure scene safety.
The concept tested here is the very first step in any emergency situation. Scene safety. The
keyword immediate first action highlights the critical importance of ensuring the environment is
safe for both the rescuer and the victim before doing anything else. You cannot effectively help
someone if you yourself become a victim. For example, if someone collapses in the middle of a
busy street, you must first ensure traffic is stopped or move the person to a safer location before
beginning care. Always remember, your safety comes first because you can't help others if
you're injured.
Question two,
for an adult requiring CPR, what is the correct compression depth?
A. At least 1 in 2.5 cm.
B. At least 2 in 5 cm.
C. No more than 3 in 7.5 cm.
D. About 1.5 in 3.8 cm.
Answer B. At least 2 in 5 cm.
This question focuses on the technical skill of highquality chest compressions for adults,
specifically the appropriate depth. The phrase correct compression depth is a key clue guiding
you to recall the specific measurement required for effective blood flow. Compressing the chest
at least 2 in allows for adequate blood circulation to vital organs like the brain and heart. For
example, imagine trying to pump water through a hose. You need enough force to make the
water move effectively just as you need enough depth to circulate blood in CPR. Remember to
push hard enough to make a difference, but not excessively deep.
Question three.
What is the recommended compression rate for highquality CPR in adults, children, and
infants?
A. 60 to 80 compressions per minute?
, B. 80 to 100 compressions per minute.
C. 100 to 120 compressions per minute.
D. 120 to 140 compressions per minute.
Answer C. 100 to 120 compressions per minute.
This question tests your knowledge of the correct speed for chest compressions, a crucial
component of highquality CPR for all age groups. The recommended compression rate refers to
how quickly you should be pushing on the chest. A rate of 100 to 120 compressions per minute
ensures that enough blood is circulated consistently to maintain vital organ function until
advanced help arrives. Think of it like listening to a fast-paced song. Maintaining that consistent,
rapid rhythm helps you stay on target. Always aim for quick and steady compressions without
going too fast.
Question four.
When providing single rescuer CPR to an adult, what is the correct compression to ventilation
ratio?
A. 15 compressions to two breaths.
B 30 compressions to two breaths.
C. 30 compressions to five breaths.
D. 15 compressions to one breath.
Answer: B. 30 compressions to two breaths.
This question assesses your understanding of the proper ratio for providing effective CPR to an
adult as a single rescuer. The single rescuer CPR and compression to ventilation ratio are the
key terms that point to the specific guideline for balancing chest compressions with rescue
breaths. For adults, the emphasis is on compressions. So, 30 compressions followed by two
breaths ensures maximum blood flow while still providing necessary oxygen. For instance, after
pushing 30 times quickly and effectively, you pause briefly for two quick breaths. Always
prioritize compressions, but don't forget those vital breaths.
Question five.
How long should you check for a pulse on an unresponsive adult victim?
A. At least 10 seconds, but no more than 20 seconds.
B. At least 5 seconds, but no more than 10 seconds.
C. No more than 5 seconds.
D. Exactly 10 seconds.
Answer B. At least 5 seconds, but no more than 10 seconds.
This question evaluates your ability to quickly and accurately assess an unresponsive victim.
Specifically, the duration of a pulse check. The phrase, "How long should you check for a
pulse?" emphasizes the importance of a swift but thorough assessment. Checking for at least 5
seconds, but no more than 10 seconds, ensures you don't waste precious time delaying CPR if
a pulse is absent, yet provides enough time to detect a faint pulsive present. For example,
Questions And Answers Exam (25 Key
Questions)
Question one.
What is the immediate first action a rescuer should take upon arriving at a potential emergency
scene?
A. Begin chest compressions.
B. Activate the emergency response system.
C. Ensure scene safety.
D. Check for responsiveness.
Answer. C. Ensure scene safety.
The concept tested here is the very first step in any emergency situation. Scene safety. The
keyword immediate first action highlights the critical importance of ensuring the environment is
safe for both the rescuer and the victim before doing anything else. You cannot effectively help
someone if you yourself become a victim. For example, if someone collapses in the middle of a
busy street, you must first ensure traffic is stopped or move the person to a safer location before
beginning care. Always remember, your safety comes first because you can't help others if
you're injured.
Question two,
for an adult requiring CPR, what is the correct compression depth?
A. At least 1 in 2.5 cm.
B. At least 2 in 5 cm.
C. No more than 3 in 7.5 cm.
D. About 1.5 in 3.8 cm.
Answer B. At least 2 in 5 cm.
This question focuses on the technical skill of highquality chest compressions for adults,
specifically the appropriate depth. The phrase correct compression depth is a key clue guiding
you to recall the specific measurement required for effective blood flow. Compressing the chest
at least 2 in allows for adequate blood circulation to vital organs like the brain and heart. For
example, imagine trying to pump water through a hose. You need enough force to make the
water move effectively just as you need enough depth to circulate blood in CPR. Remember to
push hard enough to make a difference, but not excessively deep.
Question three.
What is the recommended compression rate for highquality CPR in adults, children, and
infants?
A. 60 to 80 compressions per minute?
, B. 80 to 100 compressions per minute.
C. 100 to 120 compressions per minute.
D. 120 to 140 compressions per minute.
Answer C. 100 to 120 compressions per minute.
This question tests your knowledge of the correct speed for chest compressions, a crucial
component of highquality CPR for all age groups. The recommended compression rate refers to
how quickly you should be pushing on the chest. A rate of 100 to 120 compressions per minute
ensures that enough blood is circulated consistently to maintain vital organ function until
advanced help arrives. Think of it like listening to a fast-paced song. Maintaining that consistent,
rapid rhythm helps you stay on target. Always aim for quick and steady compressions without
going too fast.
Question four.
When providing single rescuer CPR to an adult, what is the correct compression to ventilation
ratio?
A. 15 compressions to two breaths.
B 30 compressions to two breaths.
C. 30 compressions to five breaths.
D. 15 compressions to one breath.
Answer: B. 30 compressions to two breaths.
This question assesses your understanding of the proper ratio for providing effective CPR to an
adult as a single rescuer. The single rescuer CPR and compression to ventilation ratio are the
key terms that point to the specific guideline for balancing chest compressions with rescue
breaths. For adults, the emphasis is on compressions. So, 30 compressions followed by two
breaths ensures maximum blood flow while still providing necessary oxygen. For instance, after
pushing 30 times quickly and effectively, you pause briefly for two quick breaths. Always
prioritize compressions, but don't forget those vital breaths.
Question five.
How long should you check for a pulse on an unresponsive adult victim?
A. At least 10 seconds, but no more than 20 seconds.
B. At least 5 seconds, but no more than 10 seconds.
C. No more than 5 seconds.
D. Exactly 10 seconds.
Answer B. At least 5 seconds, but no more than 10 seconds.
This question evaluates your ability to quickly and accurately assess an unresponsive victim.
Specifically, the duration of a pulse check. The phrase, "How long should you check for a
pulse?" emphasizes the importance of a swift but thorough assessment. Checking for at least 5
seconds, but no more than 10 seconds, ensures you don't waste precious time delaying CPR if
a pulse is absent, yet provides enough time to detect a faint pulsive present. For example,
