EMT120 EMT Skills Lab Exam Prep – Real Practice Questions, Answers & Detailed
Rationales (Updated 2026) | Patient Assessment Skills, Airway
Management & Oxygen Therapy, CPR & AED Procedures, Trauma Care & Bleeding
Control, Vital Signs & Emergency Response, Splinting & Immobilization, Medical
Emergencies, EMS Communication, Practical Skills Check-Off & NREMT Lab Review
Question 1: During scene size-up for a motor vehicle collision, what is the EMT's
first priority before approaching any patient?
A. Determine the number of patients
B. Assess mechanism of injury
C. Ensure scene safety
D. Request additional resources
CORRECT ANSWER: C. Ensure scene safety
Rationale: Scene safety is the foundational step in all EMS responses. The EMT must
verify that the environment poses no immediate threat to themselves, their partner, or
the patient before initiating care. Approaching an unsafe scene risks creating additional
victims and compromises the entire emergency response.
Question 2: When performing a primary assessment on an unresponsive adult
patient, which action should be completed immediately after confirming
unresponsiveness?
A. Check for a carotid pulse
B. Open the airway using head-tilt/chin-lift
C. Apply high-flow oxygen via non-rebreather mask
D. Assess for severe external bleeding
CORRECT ANSWER: B. Open the airway using head-tilt/chin-lift
Rationale: Following confirmation of unresponsiveness, airway management is the next
critical step in the primary assessment sequence (C-A-B is for CPR; for general primary
assessment, it remains Airway-Breathing-Circulation). Opening the airway ensures
potential obstructions are addressed before assessing breathing or circulation.
Question 3: Which technique is most appropriate for inserting an oropharyngeal
airway (OPA) in an adult patient?
A. Insert curved end upward, then rotate 180 degrees once past the tongue
B. Insert straight downward without rotation
C. Measure from nose to earlobe to determine size
D. Use only if the patient has a gag reflex
CORRECT ANSWER: A. Insert curved end upward, then rotate 180 degrees once
past the tongue
Rationale: The proper OPA insertion technique involves inserting the airway with the
curvature facing upward toward the roof of the mouth to avoid pushing the tongue
posteriorly. Once the tip reaches the posterior pharynx, it is rotated 180 degrees so the
,curve follows the natural anatomy of the oropharynx, securing the airway without
trauma.
Question 4: What is the correct compression-to-ventilation ratio for two-rescuer
CPR on an adult patient?
A. 15:2
B. 30:2
C. 20:2
D. 5:1
CORRECT ANSWER: B. 30:2
Rationale: Current AHA and NREMT guidelines specify a 30:2 compression-to-
ventilation ratio for adult CPR regardless of the number of rescuers. This ratio optimizes
coronary perfusion pressure while providing adequate ventilation without excessive
interruption of chest compressions.
Question 5: When applying a cervical collar during spinal motion restriction, what
measurement determines proper collar size?
A. Distance from chin to sternum
B. Distance from base of neck to top of shoulders
C. Distance from bottom of chin to top of trapezius muscle
D. Distance from earlobe to clavicle
CORRECT ANSWER: C. Distance from bottom of chin to top of trapezius muscle
Rationale: Proper cervical collar sizing requires measuring from the bottom of the
patient's chin to the top of the trapezius muscle (shoulder). This ensures the collar
immobilizes the cervical spine without hyperextending or flexing the neck, which could
exacerbate potential spinal injuries.
Question 6: Which finding during a rapid trauma assessment indicates the need for
immediate transport rather than on-scene interventions?
A. Deformity of the left forearm
B. Systolic blood pressure of 88 mmHg
C. Minor abrasion on the forehead
D. Patient complaint of mild headache
CORRECT ANSWER: B. Systolic blood pressure of 88 mmHg
Rationale: A systolic blood pressure below 90 mmHg in an adult trauma patient
indicates shock and is a critical finding requiring rapid transport to a trauma center.
While other injuries need attention, hypotension signifies life-threatening hemorrhage
or other severe compromise that cannot be definitively managed in the prehospital
setting.
, Question 7: What is the appropriate oxygen flow rate for a non-rebreather mask to
achieve the highest possible FiO2?
A. 2-4 L/min
B. 6-8 L/min
C. 10-15 L/min
D. 20-25 L/min
CORRECT ANSWER: C. 10-15 L/min
Rationale: A non-rebreather mask requires a flow rate of 10-15 L/min to ensure the
reservoir bag remains inflated during inspiration and to minimize rebreathing of exhaled
gases. This flow rate delivers an FiO2 of approximately 80-90%, the highest
concentration achievable with basic airway adjuncts.
Question 8: When controlling severe external bleeding from an extremity, what is
the first intervention an EMT should attempt?
A. Apply a tourniquet proximal to the wound
B. Elevate the extremity above heart level
C. Apply direct pressure with a sterile dressing
D. Pack the wound with hemostatic gauze
CORRECT ANSWER: C. Apply direct pressure with a sterile dressing
Rationale: Direct pressure is the initial, most effective method for controlling external
hemorrhage. It should be applied firmly with a sterile dressing before considering
escalation to hemostatic agents, wound packing, or tourniquet application, which are
reserved for life-threatening bleeding unresponsive to direct pressure.
Question 9: Which assessment finding is most indicative of adequate ventilation
when using a bag-valve-mask device?
A. Chest rise with each ventilation
B. Audible breath sounds bilaterally
C. Pulse oximetry reading above 94%
D. Patient's lips turning pink
CORRECT ANSWER: A. Chest rise with each ventilation
Rationale: Visible, symmetric chest rise is the most immediate and reliable indicator
that ventilations are effectively entering the lungs. While other signs may support
adequate oxygenation, chest rise directly confirms that air is being delivered past the
upper airway and into the thorax.
Question 10: During patient packaging for transport, why is it critical to reassess
vital signs after immobilization?
A. Immobilization devices can compromise circulation or respiration
B. Patients often become anxious during immobilization
Rationales (Updated 2026) | Patient Assessment Skills, Airway
Management & Oxygen Therapy, CPR & AED Procedures, Trauma Care & Bleeding
Control, Vital Signs & Emergency Response, Splinting & Immobilization, Medical
Emergencies, EMS Communication, Practical Skills Check-Off & NREMT Lab Review
Question 1: During scene size-up for a motor vehicle collision, what is the EMT's
first priority before approaching any patient?
A. Determine the number of patients
B. Assess mechanism of injury
C. Ensure scene safety
D. Request additional resources
CORRECT ANSWER: C. Ensure scene safety
Rationale: Scene safety is the foundational step in all EMS responses. The EMT must
verify that the environment poses no immediate threat to themselves, their partner, or
the patient before initiating care. Approaching an unsafe scene risks creating additional
victims and compromises the entire emergency response.
Question 2: When performing a primary assessment on an unresponsive adult
patient, which action should be completed immediately after confirming
unresponsiveness?
A. Check for a carotid pulse
B. Open the airway using head-tilt/chin-lift
C. Apply high-flow oxygen via non-rebreather mask
D. Assess for severe external bleeding
CORRECT ANSWER: B. Open the airway using head-tilt/chin-lift
Rationale: Following confirmation of unresponsiveness, airway management is the next
critical step in the primary assessment sequence (C-A-B is for CPR; for general primary
assessment, it remains Airway-Breathing-Circulation). Opening the airway ensures
potential obstructions are addressed before assessing breathing or circulation.
Question 3: Which technique is most appropriate for inserting an oropharyngeal
airway (OPA) in an adult patient?
A. Insert curved end upward, then rotate 180 degrees once past the tongue
B. Insert straight downward without rotation
C. Measure from nose to earlobe to determine size
D. Use only if the patient has a gag reflex
CORRECT ANSWER: A. Insert curved end upward, then rotate 180 degrees once
past the tongue
Rationale: The proper OPA insertion technique involves inserting the airway with the
curvature facing upward toward the roof of the mouth to avoid pushing the tongue
posteriorly. Once the tip reaches the posterior pharynx, it is rotated 180 degrees so the
,curve follows the natural anatomy of the oropharynx, securing the airway without
trauma.
Question 4: What is the correct compression-to-ventilation ratio for two-rescuer
CPR on an adult patient?
A. 15:2
B. 30:2
C. 20:2
D. 5:1
CORRECT ANSWER: B. 30:2
Rationale: Current AHA and NREMT guidelines specify a 30:2 compression-to-
ventilation ratio for adult CPR regardless of the number of rescuers. This ratio optimizes
coronary perfusion pressure while providing adequate ventilation without excessive
interruption of chest compressions.
Question 5: When applying a cervical collar during spinal motion restriction, what
measurement determines proper collar size?
A. Distance from chin to sternum
B. Distance from base of neck to top of shoulders
C. Distance from bottom of chin to top of trapezius muscle
D. Distance from earlobe to clavicle
CORRECT ANSWER: C. Distance from bottom of chin to top of trapezius muscle
Rationale: Proper cervical collar sizing requires measuring from the bottom of the
patient's chin to the top of the trapezius muscle (shoulder). This ensures the collar
immobilizes the cervical spine without hyperextending or flexing the neck, which could
exacerbate potential spinal injuries.
Question 6: Which finding during a rapid trauma assessment indicates the need for
immediate transport rather than on-scene interventions?
A. Deformity of the left forearm
B. Systolic blood pressure of 88 mmHg
C. Minor abrasion on the forehead
D. Patient complaint of mild headache
CORRECT ANSWER: B. Systolic blood pressure of 88 mmHg
Rationale: A systolic blood pressure below 90 mmHg in an adult trauma patient
indicates shock and is a critical finding requiring rapid transport to a trauma center.
While other injuries need attention, hypotension signifies life-threatening hemorrhage
or other severe compromise that cannot be definitively managed in the prehospital
setting.
, Question 7: What is the appropriate oxygen flow rate for a non-rebreather mask to
achieve the highest possible FiO2?
A. 2-4 L/min
B. 6-8 L/min
C. 10-15 L/min
D. 20-25 L/min
CORRECT ANSWER: C. 10-15 L/min
Rationale: A non-rebreather mask requires a flow rate of 10-15 L/min to ensure the
reservoir bag remains inflated during inspiration and to minimize rebreathing of exhaled
gases. This flow rate delivers an FiO2 of approximately 80-90%, the highest
concentration achievable with basic airway adjuncts.
Question 8: When controlling severe external bleeding from an extremity, what is
the first intervention an EMT should attempt?
A. Apply a tourniquet proximal to the wound
B. Elevate the extremity above heart level
C. Apply direct pressure with a sterile dressing
D. Pack the wound with hemostatic gauze
CORRECT ANSWER: C. Apply direct pressure with a sterile dressing
Rationale: Direct pressure is the initial, most effective method for controlling external
hemorrhage. It should be applied firmly with a sterile dressing before considering
escalation to hemostatic agents, wound packing, or tourniquet application, which are
reserved for life-threatening bleeding unresponsive to direct pressure.
Question 9: Which assessment finding is most indicative of adequate ventilation
when using a bag-valve-mask device?
A. Chest rise with each ventilation
B. Audible breath sounds bilaterally
C. Pulse oximetry reading above 94%
D. Patient's lips turning pink
CORRECT ANSWER: A. Chest rise with each ventilation
Rationale: Visible, symmetric chest rise is the most immediate and reliable indicator
that ventilations are effectively entering the lungs. While other signs may support
adequate oxygenation, chest rise directly confirms that air is being delivered past the
upper airway and into the thorax.
Question 10: During patient packaging for transport, why is it critical to reassess
vital signs after immobilization?
A. Immobilization devices can compromise circulation or respiration
B. Patients often become anxious during immobilization
