9/26/25, 4:14 PM JB test prep EMT <span style="color:#000;font-weight:bold;">240+</span> (2025-2026 A+ Graded) Exam-Style Questions | Verifie…
EMT JB Test Prep Questions and Answers
Question 1
All of the following would cause an increased level of carbon dioxide in the arterial
blood, EXCEPT:
A: short exhalation phase.
B: reduced tidal volume.
C: slow, shallow breathing.
D: deep, rapid breathing.
Correct Answer
D
Rationale:
Deep, rapid breathing increases the rate at which carbon dioxide is removed from the blood
through exhalation, thereby lowering the arterial carbon dioxide level. In contrast, the other
options either slow or reduce the rate of carbon dioxide removal, resulting in an increased level of
carbon dioxide in the arterial blood.
Question 2
A woman presents with acute shortness of breath. Her breathing appears labored and
her skin is pale. You should:
A: deliver humidified oxygen and administer an inhaled bronchodilator.
B: ensure that her oxygen saturation does not fall below 85 percent.
C: administer high-flow oxygen and assess the quality of her breathing.
D: place her supine and assist her ventilations with a bag-mask device.
Correct Answer
The correct answer is C
Rationale:
Administering high-flow oxygen is crucial in this scenario to rapidly increase the patient's oxygen
saturation and alleviate her respiratory distress. Assessing the quality of her breathing is essential
to determine if she requires non-invasive ventilation or endotracheal intubation, which is a critical
decision in acute respiratory emergencies.
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,9/26/25, 4:14 PM JB test prep EMT <span style="color:#000;font-weight:bold;">240+</span> (2025-2026 A+ Graded) Exam-Style Questions | Verifie…
Question 3
Which of the following signs or symptoms is indicative of cerebral hypoxia?
A: Diffuse wheezing on exhalation
B: Chief complaint of dyspnea
C: Heart rate greater than 120 beats/min
D: Decreased level of consciousness
Correct Answer
The correct answer is D;
Rationale:
Cerebral hypoxia refers to a reduction in oxygen supply to the brain, which can lead to impaired
mental status, including confusion, agitation, and eventually loss of consciousness. A decreased
level of consciousness (option D) is a direct indicator of cerebral hypoxia, as it reflects brain
dysfunction due to inadequate oxygenation.
Question 4
You are assessing a 66-year-old man who has emphysema and complains of
worsened shortness of breath. He is confused, has a heart rate of 120 beats/min, and
an oxygen saturation of 89%. Which of the following assessment findings should
concern you the MOST?
A: Confusion
B: Worsened shortness of breath
C: Low oxygen saturation
D: Tachycardia
Correct Answer
The correct answer is A;
Rationale:
The correct answer is A because confusion in a patient with emphysema can be a sign of
hypercapnic encephalopathy, a life-threatening condition caused by excessive carbon dioxide
levels in the blood, which is more concerning than the other symptoms. This is because
hypercapnic encephalopathy can quickly progress to a coma or even death if left untreated,
making confusion the most critical finding to address in this scenario.
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,9/26/25, 4:14 PM JB test prep EMT <span style="color:#000;font-weight:bold;">240+</span> (2025-2026 A+ Graded) Exam-Style Questions | Verifie…
Question 5
Which of the following is the preferred initial method for providing artificial
ventilations to an apneic adult?
A: Flow-restricted, oxygen-powered ventilation device
B: Two-person bag-valve-mask technique with 100% oxygen
C: Mouth-to-mask technique with supplemental oxygen
D: One-person bag-valve-mask technique with 100% oxygen
Correct Answer
The correct answer is C;
Rationale:
The two-person bag-valve-mask technique with 100% oxygen is the preferred initial method for
providing artificial ventilations to an apneic adult because it allows for a more effective and
efficient delivery of oxygen while minimizing the risk of carbon dioxide rebreathing. This technique
also enables a second person to assist in maintaining a patent airway and providing additional
support during ventilation.
Question 6
Which of the following processes occurs during inhalation?
A: The intercostal muscles and diaphragm both contract.
B: The diaphragm contracts and the intercostal muscles relax.
C: The diaphragm descends and the intercostal muscles relax.
D: The intercostal muscles relax and the diaphragm descends.
Correct Answer
The correct answer is A;
Rationale:
The correct answer is A because contraction of the intercostal muscles and diaphragm together
allows for an increase in the volume of the chest cavity, which in turn draws air into the lungs
through inhalation. This coordinated contraction is essential for effective breathing and is a key
aspect of the inhalation process.
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, 9/26/25, 4:14 PM JB test prep EMT <span style="color:#000;font-weight:bold;">240+</span> (2025-2026 A+ Graded) Exam-Style Questions | Verifie…
Question 7
Which of the following would MOST likely occur if an adult patient is breathing at a
rate of 45 breaths/min with shallow depth?
A: Most of his or her inhaled air will not go beyond the anatomic dead space.
B: The lungs would become hyperinflated, potentially causing a pneumothorax.
C: Alveolar minute volume would increase due to the rapid respiratory rate.
D: The volume of air that reaches the alveoli would increase significantly.
Correct Answer
The correct answer is A;
Rationale:
The anatomic dead space is the portion of the lungs that does not participate in gas exchange,
including the airways from the trachea to the terminal bronchioles. Since the patient is breathing
at a shallow depth, most of the inhaled air will not extend beyond the anatomic dead space,
meaning it will not reach the alveoli where gas exchange occurs, making option A the correct
answer due to this key concept.
Question 8
Occasional, irregular breaths that may be observed in a cardiac arrest patient are
called:
A: Biot respirations.
B: Cheyne-Stokes respirations.
C: ataxic respirations.
D: agonal gasps.
Correct Answer
The correct answer is D;
Rationale:
Biot respirations are characterized by irregular and unpredictable breath patterns, often consisting
of clusters of rapid breaths followed by periods of apnea, which aligns with the description of
occasional, irregular breaths in a cardiac arrest patient. This unique pattern is distinct from the
other options, such as Cheyne-Stokes respirations, which exhibit a more cyclical pattern of
breathing, and therefore makes option D the most accurate answer.
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EMT JB Test Prep Questions and Answers
Question 1
All of the following would cause an increased level of carbon dioxide in the arterial
blood, EXCEPT:
A: short exhalation phase.
B: reduced tidal volume.
C: slow, shallow breathing.
D: deep, rapid breathing.
Correct Answer
D
Rationale:
Deep, rapid breathing increases the rate at which carbon dioxide is removed from the blood
through exhalation, thereby lowering the arterial carbon dioxide level. In contrast, the other
options either slow or reduce the rate of carbon dioxide removal, resulting in an increased level of
carbon dioxide in the arterial blood.
Question 2
A woman presents with acute shortness of breath. Her breathing appears labored and
her skin is pale. You should:
A: deliver humidified oxygen and administer an inhaled bronchodilator.
B: ensure that her oxygen saturation does not fall below 85 percent.
C: administer high-flow oxygen and assess the quality of her breathing.
D: place her supine and assist her ventilations with a bag-mask device.
Correct Answer
The correct answer is C
Rationale:
Administering high-flow oxygen is crucial in this scenario to rapidly increase the patient's oxygen
saturation and alleviate her respiratory distress. Assessing the quality of her breathing is essential
to determine if she requires non-invasive ventilation or endotracheal intubation, which is a critical
decision in acute respiratory emergencies.
Page 1 of 128
1/128
,9/26/25, 4:14 PM JB test prep EMT <span style="color:#000;font-weight:bold;">240+</span> (2025-2026 A+ Graded) Exam-Style Questions | Verifie…
Question 3
Which of the following signs or symptoms is indicative of cerebral hypoxia?
A: Diffuse wheezing on exhalation
B: Chief complaint of dyspnea
C: Heart rate greater than 120 beats/min
D: Decreased level of consciousness
Correct Answer
The correct answer is D;
Rationale:
Cerebral hypoxia refers to a reduction in oxygen supply to the brain, which can lead to impaired
mental status, including confusion, agitation, and eventually loss of consciousness. A decreased
level of consciousness (option D) is a direct indicator of cerebral hypoxia, as it reflects brain
dysfunction due to inadequate oxygenation.
Question 4
You are assessing a 66-year-old man who has emphysema and complains of
worsened shortness of breath. He is confused, has a heart rate of 120 beats/min, and
an oxygen saturation of 89%. Which of the following assessment findings should
concern you the MOST?
A: Confusion
B: Worsened shortness of breath
C: Low oxygen saturation
D: Tachycardia
Correct Answer
The correct answer is A;
Rationale:
The correct answer is A because confusion in a patient with emphysema can be a sign of
hypercapnic encephalopathy, a life-threatening condition caused by excessive carbon dioxide
levels in the blood, which is more concerning than the other symptoms. This is because
hypercapnic encephalopathy can quickly progress to a coma or even death if left untreated,
making confusion the most critical finding to address in this scenario.
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,9/26/25, 4:14 PM JB test prep EMT <span style="color:#000;font-weight:bold;">240+</span> (2025-2026 A+ Graded) Exam-Style Questions | Verifie…
Question 5
Which of the following is the preferred initial method for providing artificial
ventilations to an apneic adult?
A: Flow-restricted, oxygen-powered ventilation device
B: Two-person bag-valve-mask technique with 100% oxygen
C: Mouth-to-mask technique with supplemental oxygen
D: One-person bag-valve-mask technique with 100% oxygen
Correct Answer
The correct answer is C;
Rationale:
The two-person bag-valve-mask technique with 100% oxygen is the preferred initial method for
providing artificial ventilations to an apneic adult because it allows for a more effective and
efficient delivery of oxygen while minimizing the risk of carbon dioxide rebreathing. This technique
also enables a second person to assist in maintaining a patent airway and providing additional
support during ventilation.
Question 6
Which of the following processes occurs during inhalation?
A: The intercostal muscles and diaphragm both contract.
B: The diaphragm contracts and the intercostal muscles relax.
C: The diaphragm descends and the intercostal muscles relax.
D: The intercostal muscles relax and the diaphragm descends.
Correct Answer
The correct answer is A;
Rationale:
The correct answer is A because contraction of the intercostal muscles and diaphragm together
allows for an increase in the volume of the chest cavity, which in turn draws air into the lungs
through inhalation. This coordinated contraction is essential for effective breathing and is a key
aspect of the inhalation process.
Page 3 of 128
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, 9/26/25, 4:14 PM JB test prep EMT <span style="color:#000;font-weight:bold;">240+</span> (2025-2026 A+ Graded) Exam-Style Questions | Verifie…
Question 7
Which of the following would MOST likely occur if an adult patient is breathing at a
rate of 45 breaths/min with shallow depth?
A: Most of his or her inhaled air will not go beyond the anatomic dead space.
B: The lungs would become hyperinflated, potentially causing a pneumothorax.
C: Alveolar minute volume would increase due to the rapid respiratory rate.
D: The volume of air that reaches the alveoli would increase significantly.
Correct Answer
The correct answer is A;
Rationale:
The anatomic dead space is the portion of the lungs that does not participate in gas exchange,
including the airways from the trachea to the terminal bronchioles. Since the patient is breathing
at a shallow depth, most of the inhaled air will not extend beyond the anatomic dead space,
meaning it will not reach the alveoli where gas exchange occurs, making option A the correct
answer due to this key concept.
Question 8
Occasional, irregular breaths that may be observed in a cardiac arrest patient are
called:
A: Biot respirations.
B: Cheyne-Stokes respirations.
C: ataxic respirations.
D: agonal gasps.
Correct Answer
The correct answer is D;
Rationale:
Biot respirations are characterized by irregular and unpredictable breath patterns, often consisting
of clusters of rapid breaths followed by periods of apnea, which aligns with the description of
occasional, irregular breaths in a cardiac arrest patient. This unique pattern is distinct from the
other options, such as Cheyne-Stokes respirations, which exhibit a more cyclical pattern of
breathing, and therefore makes option D the most accurate answer.
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