NBRC EXIT EXAM 2026 – High-Yield TMC & CSE Practice
Questions, Verified Answers & Clinical Rationales (Pass
Guarantee RRT/CRT PDF)
"Pass your NBRC Exit Exam on your very first attempt and unlock your pathway to
becoming an RRT or CRT with this comprehensive 2026 study guide. This instant
download features highly predictive multiple-choice questions and clinical simulation
pathways complete with verified exact answers and detailed, NBRC-aligned rationales.
Skip the stress of program exit requirements and download the precise mechanical
ventilation, ABG interpretation, and patient assessment data you need to pass today!"
Question 1
A 58-year-old female patient with a history of severe emphysema is receiving oxygen
via a nasal cannula at 2 L/min in the emergency department. The respiratory therapist
reviews the patient's arterial blood gas (ABG) results: pH 7.36, PaCO2 64 mmHg, PaO2
58 mmHg, HCO3- 35 mEq/L. Which of the following describes this patient's acid-base
status?
A) Acute respiratory acidosis with severe hypoxemia
B) Uncompensated metabolic alkalosis with mild hypoxemia
C) Fully compensated respiratory acidosis with moderate hypoxemia
D) Partially compensated metabolic acidosis with severe hypoxemia
Correct Answer: C) Fully compensated respiratory acidosis with moderate
hypoxemia
Rationale: The pH is within the normal range (7.35–7.45) but is on the acidotic side of
normal (< 7.40). The PaCO2 is significantly elevated at 64 mmHg (normal: 35–45
mmHg), indicating chronic carbon dioxide retention. The HCO3- is high at 35 mEq/L
(normal: 22–26 mEq/L), demonstrating that the kidneys have retained bicarbonate over
time to return the pH to normal. This confirms full compensation. A PaO2 of 58 mmHg
indicates moderate hypoxemia, which is typical and acceptable for a chronic COPD
patient.
,Question 2
While reviewing a patient's chart, the respiratory therapist notes that the patient has a
high Central Venous Pressure (CVP) of 14 mmHg, a normal Pulmonary Artery Pressure
(PAP) of 24/9 mmHg, and a normal Pulmonary Artery Wedge Pressure (PAWP) of 7
mmHg. These findings are most consistent with which of the following conditions?
A) Left ventricular failure
B) Right ventricular failure
C) Hypervolemia
D) Pulmonary hypertension
Correct Answer: B) Right ventricular failure
Rationale: Central Venous Pressure (CVP) reflects right atrial pressure and right
ventricular preload (normal: 2–6 mmHg). An isolated elevation in CVP with a normal
PAP (normal: 25/10 mmHg) and normal PAWP (normal: 4–12 mmHg) points directly to
a problem originating in the right heart, such as right ventricular failure or cor pulmonale.
Left ventricular failure and hypervolemia would cause an elevation in the PAWP, while
pulmonary hypertension would manifest as a significantly elevated PAP.
Question 3
A 32-year-old male patient is admitted to the intensive care unit following a motor
vehicle accident. The patient is intubated and placed on mechanical ventilation. The
respiratory therapist performs an optimal PEEP study and notes that as PEEP is
increased from 10 cm H2O to 15 cm H2O, the patient's mixed venous oxygen saturation
(SvO2) drops from 68% to 54%, and the cardiac output decreases. What is the most
appropriate action?
A) Maintain the PEEP at 15 cm H2O to improve lung recruitment.
B) Increase the PEEP to 18 cm H2O to offset the hypoxemia.
C) Decrease the PEEP back to 10 cm H2O.
D) Initiate a continuous infusion of a loop diuretic.
Correct Answer: C) Decrease the PEEP back to 10 cm H2O.
Rationale: Mixed venous oxygen saturation (SvO2) is an excellent indicator of tissue
perfusion and oxygen delivery (normal: 60%–80%). A significant drop in SvO2
accompanied by a drop in cardiac output when PEEP is increased indicates that the
higher PEEP level (15 cm H2O) is causing excessive intrathoracic pressure, which
,compromises venous return and cardiac function. PEEP should be decreased to the
previous level (10 cm H2O) where cardiovascular function was not impaired.
Question 4
During a routine check of an O2 therapy setup, the respiratory therapist notes that a
patient is wearing a non-rebreather mask set at a flow rate of 6 L/min. The reservoir bag
completely collapses every time the patient inhales. What is the most appropriate initial
action?
A) Switch the patient to a simple oxygen mask at 6 L/min.
B) Increase the oxygen flow rate to at least 10–15 L/min.
C) Intubate the patient immediately for impending respiratory failure.
D) Decrease the oxygen flow rate to 4 L/min to prevent hyperoxia.
Correct Answer: B) Increase the oxygen flow rate to at least 10–15 L/min.
Rationale: A non-rebreather mask requires a high enough flow rate to keep the reservoir
bag at least one-third to one-half full during inspiration (typically 10 to 15 L/min). If the
bag collapses completely, the patient is not receiving the intended high concentration of
oxygen and may be rebreathing exhaled gases or room air. Increasing the flow rate
ensures adequate gas volume is always available in the reservoir.
Question 5
A respiratory therapist is preparing to perform an arterial puncture on a patient's radial
artery. Before inserting the needle, the therapist performs the modified Allen's test and
observes that the patient's hand remains blanched for 15 seconds after releasing
pressure over the ulnar artery. What should the therapist do next?
A) Proceed with the radial artery puncture on that wrist.
B) Perform the puncture on the brachial artery of the same arm.
C) Attempt the modified Allen's test on the opposite wrist.
D) Inform the physician that the patient has excellent collateral circulation.
Correct Answer: C) Attempt the modified Allen's test on the opposite wrist.
, Rationale: A normal modified Allen's test shows color returning to the hand within 5 to
10 seconds, which indicates adequate collateral circulation via the ulnar artery. A result
of 15 seconds is considered negative or abnormal, meaning collateral circulation is
insufficient. To prevent ischemic injury to the hand if the radial artery is damaged during
the puncture, the therapist must not use this site and should test the opposite wrist next.
Question 6
An adult patient in the ICU is receiving mechanical ventilation in Volume Control (VC)
mode. The respiratory therapist assesses the pressure-volume loop on the ventilator
monitor and notices a distinct "beak-like" appearance at the top right of the inspiratory
curve. Which of the following adjustments will resolve this issue?
A) Increase the set PEEP level.
B) Decrease the set tidal volume.
C) Increase the inspiratory flow rate.
D) Switch to a pressure-regulated mode.
Correct Answer: B) Decrease the set tidal volume.
Rationale: A "beaking" pattern on a pressure-volume loop is a classic indicator of
alveolar overdistension. This occurs when the lungs have reached their compliance limit
at the end of inspiration, causing a sharp rise in pressure with minimal change in
volume. Reducing the set tidal volume (or reducing peak inspiratory pressure) prevents
overdistension and protects the lungs from ventilator-induced lung injury.
Question 7
The respiratory therapist evaluates a 10-year-old child presenting to the emergency
department with severe wheezing, tachypnea, and intercostal retractions. The patient is
diagnosed with an acute asthma exacerbation. After administering three consecutive
small volume nebulizer treatments with albuterol (Proventil), the therapist notes that
wheezing has completely ceased and breath sounds are now markedly diminished
bilaterally. This change most likely indicates:
A) Complete resolution of the bronchospasm.
B) Development of a severe pneumothorax.
Questions, Verified Answers & Clinical Rationales (Pass
Guarantee RRT/CRT PDF)
"Pass your NBRC Exit Exam on your very first attempt and unlock your pathway to
becoming an RRT or CRT with this comprehensive 2026 study guide. This instant
download features highly predictive multiple-choice questions and clinical simulation
pathways complete with verified exact answers and detailed, NBRC-aligned rationales.
Skip the stress of program exit requirements and download the precise mechanical
ventilation, ABG interpretation, and patient assessment data you need to pass today!"
Question 1
A 58-year-old female patient with a history of severe emphysema is receiving oxygen
via a nasal cannula at 2 L/min in the emergency department. The respiratory therapist
reviews the patient's arterial blood gas (ABG) results: pH 7.36, PaCO2 64 mmHg, PaO2
58 mmHg, HCO3- 35 mEq/L. Which of the following describes this patient's acid-base
status?
A) Acute respiratory acidosis with severe hypoxemia
B) Uncompensated metabolic alkalosis with mild hypoxemia
C) Fully compensated respiratory acidosis with moderate hypoxemia
D) Partially compensated metabolic acidosis with severe hypoxemia
Correct Answer: C) Fully compensated respiratory acidosis with moderate
hypoxemia
Rationale: The pH is within the normal range (7.35–7.45) but is on the acidotic side of
normal (< 7.40). The PaCO2 is significantly elevated at 64 mmHg (normal: 35–45
mmHg), indicating chronic carbon dioxide retention. The HCO3- is high at 35 mEq/L
(normal: 22–26 mEq/L), demonstrating that the kidneys have retained bicarbonate over
time to return the pH to normal. This confirms full compensation. A PaO2 of 58 mmHg
indicates moderate hypoxemia, which is typical and acceptable for a chronic COPD
patient.
,Question 2
While reviewing a patient's chart, the respiratory therapist notes that the patient has a
high Central Venous Pressure (CVP) of 14 mmHg, a normal Pulmonary Artery Pressure
(PAP) of 24/9 mmHg, and a normal Pulmonary Artery Wedge Pressure (PAWP) of 7
mmHg. These findings are most consistent with which of the following conditions?
A) Left ventricular failure
B) Right ventricular failure
C) Hypervolemia
D) Pulmonary hypertension
Correct Answer: B) Right ventricular failure
Rationale: Central Venous Pressure (CVP) reflects right atrial pressure and right
ventricular preload (normal: 2–6 mmHg). An isolated elevation in CVP with a normal
PAP (normal: 25/10 mmHg) and normal PAWP (normal: 4–12 mmHg) points directly to
a problem originating in the right heart, such as right ventricular failure or cor pulmonale.
Left ventricular failure and hypervolemia would cause an elevation in the PAWP, while
pulmonary hypertension would manifest as a significantly elevated PAP.
Question 3
A 32-year-old male patient is admitted to the intensive care unit following a motor
vehicle accident. The patient is intubated and placed on mechanical ventilation. The
respiratory therapist performs an optimal PEEP study and notes that as PEEP is
increased from 10 cm H2O to 15 cm H2O, the patient's mixed venous oxygen saturation
(SvO2) drops from 68% to 54%, and the cardiac output decreases. What is the most
appropriate action?
A) Maintain the PEEP at 15 cm H2O to improve lung recruitment.
B) Increase the PEEP to 18 cm H2O to offset the hypoxemia.
C) Decrease the PEEP back to 10 cm H2O.
D) Initiate a continuous infusion of a loop diuretic.
Correct Answer: C) Decrease the PEEP back to 10 cm H2O.
Rationale: Mixed venous oxygen saturation (SvO2) is an excellent indicator of tissue
perfusion and oxygen delivery (normal: 60%–80%). A significant drop in SvO2
accompanied by a drop in cardiac output when PEEP is increased indicates that the
higher PEEP level (15 cm H2O) is causing excessive intrathoracic pressure, which
,compromises venous return and cardiac function. PEEP should be decreased to the
previous level (10 cm H2O) where cardiovascular function was not impaired.
Question 4
During a routine check of an O2 therapy setup, the respiratory therapist notes that a
patient is wearing a non-rebreather mask set at a flow rate of 6 L/min. The reservoir bag
completely collapses every time the patient inhales. What is the most appropriate initial
action?
A) Switch the patient to a simple oxygen mask at 6 L/min.
B) Increase the oxygen flow rate to at least 10–15 L/min.
C) Intubate the patient immediately for impending respiratory failure.
D) Decrease the oxygen flow rate to 4 L/min to prevent hyperoxia.
Correct Answer: B) Increase the oxygen flow rate to at least 10–15 L/min.
Rationale: A non-rebreather mask requires a high enough flow rate to keep the reservoir
bag at least one-third to one-half full during inspiration (typically 10 to 15 L/min). If the
bag collapses completely, the patient is not receiving the intended high concentration of
oxygen and may be rebreathing exhaled gases or room air. Increasing the flow rate
ensures adequate gas volume is always available in the reservoir.
Question 5
A respiratory therapist is preparing to perform an arterial puncture on a patient's radial
artery. Before inserting the needle, the therapist performs the modified Allen's test and
observes that the patient's hand remains blanched for 15 seconds after releasing
pressure over the ulnar artery. What should the therapist do next?
A) Proceed with the radial artery puncture on that wrist.
B) Perform the puncture on the brachial artery of the same arm.
C) Attempt the modified Allen's test on the opposite wrist.
D) Inform the physician that the patient has excellent collateral circulation.
Correct Answer: C) Attempt the modified Allen's test on the opposite wrist.
, Rationale: A normal modified Allen's test shows color returning to the hand within 5 to
10 seconds, which indicates adequate collateral circulation via the ulnar artery. A result
of 15 seconds is considered negative or abnormal, meaning collateral circulation is
insufficient. To prevent ischemic injury to the hand if the radial artery is damaged during
the puncture, the therapist must not use this site and should test the opposite wrist next.
Question 6
An adult patient in the ICU is receiving mechanical ventilation in Volume Control (VC)
mode. The respiratory therapist assesses the pressure-volume loop on the ventilator
monitor and notices a distinct "beak-like" appearance at the top right of the inspiratory
curve. Which of the following adjustments will resolve this issue?
A) Increase the set PEEP level.
B) Decrease the set tidal volume.
C) Increase the inspiratory flow rate.
D) Switch to a pressure-regulated mode.
Correct Answer: B) Decrease the set tidal volume.
Rationale: A "beaking" pattern on a pressure-volume loop is a classic indicator of
alveolar overdistension. This occurs when the lungs have reached their compliance limit
at the end of inspiration, causing a sharp rise in pressure with minimal change in
volume. Reducing the set tidal volume (or reducing peak inspiratory pressure) prevents
overdistension and protects the lungs from ventilator-induced lung injury.
Question 7
The respiratory therapist evaluates a 10-year-old child presenting to the emergency
department with severe wheezing, tachypnea, and intercostal retractions. The patient is
diagnosed with an acute asthma exacerbation. After administering three consecutive
small volume nebulizer treatments with albuterol (Proventil), the therapist notes that
wheezing has completely ceased and breath sounds are now markedly diminished
bilaterally. This change most likely indicates:
A) Complete resolution of the bronchospasm.
B) Development of a severe pneumothorax.
