NBRC TMC/CRT/RRT Exam Prep Document | 2026/2027
Edition | 200 Verified Questions - 190 Questions with Answers
NBRC TMC/CRT/RRT Exam 2026-190 QUESTIONS AND ANSWERS ALREADY GRADED A+. 100% Verified
Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive study guide is meticulously crafted for respiratory therapy candidates preparing
for the National Board for Respiratory Care (NBRC) Therapist Multiple-Choice (TMC) Examination,
as well as the Certified Respiratory Therapist (CRT) and Registered Respiratory Therapist (RRT)
credentialing exams. With 200 verified questions and detailed rationales, this resource covers all
essential domains, from patient data evaluation and equipment management to therapeutic procedures
and disease management. Updated for the 2026/2027 academic year, it reflects the latest exam
guidelines and clinical best practices, ensuring you are fully prepared to achieve a high score and earn
your credentials with confidence.
Key Features:
Patient Data Evaluation and Assessment
Interpretation of Clinical Data and Diagnostic Tests
Respiratory Pharmacology and Medication Administration
Oxygen and Medical Gas Therapy
Humidity and Aerosol Therapy
Airway Management and Clearance Techniques
Mechanical Ventilation: Principles and Modes
Mechanical Ventilation: Weaning and Monitoring
Pulmonary Function Testing and Spirometry
Arterial Blood Gas Analysis and Hemodynamics
Cardiopulmonary Resuscitation and Emergency Procedures
Respiratory Diseases: Pathophysiology and Management
Neonatal and Pediatric Respiratory Care
Home Care and Pulmonary Rehabilitation
Infection Control and Safety Practices
Patient Education and Communication
Updates for 2026:
- Updated to reflect the latest NBRC examination content matrix for 2026-2027.
- Incorporates current evidence-based clinical practice guidelines from AARC and other professional bodies.
- Revised rationales to align with the most recent respiratory care protocols and standards.
- Expanded question bank to 200 items, covering all exam domains with increased depth.
- Enhanced answer explanations to clarify common misconceptions and reinforce key concepts.
Abstract:
This exam preparation document is an authoritative resource for candidates seeking the Certified Respiratory
Therapist (CRT) and Registered Respiratory Therapist (RRT) credentials through the National Board for
Respiratory Care (NBRC). The Therapist Multiple-Choice (TMC) Examination is a critical step in the
credentialing process, and this guide provides a comprehensive review of all tested content areas. With 200
high-yield questions, each accompanied by detailed rationales, this document facilitates active learning and
self-assessment. The content is organized according to the NBRC exam matrix, covering patient data evaluation,
equipment application, therapeutic procedures, and disease management. Emphasis is placed on clinical reasoning
Page 1
,and decision-making, mirroring the exam's focus on real-world scenarios. Updated for the 2026/2027 testing cycle,
this guide ensures that candidates are exposed to the most current standards and practices in respiratory care. By
mastering these questions, candidates will enhance their knowledge, identify areas for further study, and build the
confidence needed to excel on the TMC exam and advance to the clinical simulation portion of the RRT
credentialing process.
Keywords:
NBRC TMC exam, CRT certification, RRT credential, Respiratory therapy exam prep, TMC practice questions,
Respiratory care study guide, 2026-2027 exam review
Answer Format:
Each question is presented in a multiple-choice format with four options, followed by the correct answer and a
comprehensive rationale explaining why it is correct. Additionally, incorrect options are analyzed to clarify
common pitfalls and reinforce understanding of the underlying concepts.
Compliance Checklist:
Aligned with the latest NBRC TMC/CRT/RRT exam content matrix.
Updated to reflect 2026/2027 clinical practice guidelines.
Includes rationales for both correct and incorrect answers.
Covers all major domains and subdomains of the exam.
Designed to simulate the actual exam difficulty and format.
Suitable for self-assessment and targeted review.
Content Area Overview:
Content Area Questions Key Topics Weight
Patient Data Evaluation and 1-25 Patient history, physical exam, vital signs, 12.5%
Assessment laboratory data
Clinical Data Interpretation and 26-50 ABGs, pulmonary function tests, imaging, 12.5%
Diagnostics hemodynamics
Respiratory Pharmacology 51-70 Bronchodilators, anti-inflammatory agents, 10%
mucolytics, drug delivery
Oxygen and Medical Gas 71-90 Oxygen delivery devices, titration, safety, 10%
Therapy medical gases
Humidity and Aerosol Therapy 91-110 Humidification, nebulizers, MDIs, DPIs 10%
Airway Management and 111-130 Intubation, extubation, suctioning, chest 10%
Clearance physiotherapy
Mechanical Ventilation 131-160 Modes, settings, monitoring, weaning, 15%
troubleshooting
Cardiopulmonary Resuscitation 161-175 ACLS, airway emergencies, ventilator 7.5%
and Emergency Care emergencies
Respiratory Diseases and 176-190 COPD, asthma, ARDS, pneumonia, 7.5%
Management pulmonary embolism
Neonatal and Pediatric 191-200 Neonatal resuscitation, pediatric ventilation, 5%
Respiratory Care congenital anomalies
Page 2
,Q1. During a pressure-controlled ventilation (PCV) mode, the inspiratory flow
waveform is observed to decelerate and the patient's spontaneous inspiratory effort is
detected. If the set pressure support is 10 cm H2O above PEEP and the patient's flow
demand exceeds the set flow, what is the most likely effect on the airway pressure
waveform?
A. Pressure will remain constant at the set level due to the pressure-regulating
mechanism.
B. The pressure waveform will show a downward deflection during inspiration.
C. The pressure waveform will show an upward deflection above the set pressure.
D. The pressure waveform will become square, indicating flow starvation.
Correct Answer: B. The pressure waveform will show a downward deflection during
inspiration.
Rationale: In PCV, if the patient's inspiratory flow demand exceeds the set flow, the airway
pressure will dip below the set level during inspiration, creating a characteristic 'scooped'
appearance on the pressure-time waveform. This indicates flow starvation and inadequate
pressure support.
Why Wrong:
A - Pressure does not remain constant if flow demand exceeds supply; it drops.
C - Pressure does not exceed the set level in PCV unless there is an obstruction or
coughing.
D - A square pressure waveform indicates a constant pressure plateau, not flow
starvation.
Reference: Ruppel, G.L. (2025). Manual of Pulmonary Function Testing, 12th Ed., Ch. 8.
Q2. A patient with acute respiratory distress syndrome (ARDS) is on
volume-controlled ventilation with a tidal volume of 6 mL/kg ideal body weight. The
plateau pressure is 30 cm H2O, and the driving pressure is 15 cm H2O. The patient's
static compliance is 40 mL/cm H2O. If the PEEP is increased from 10 to 15 cm H2O,
which of the following changes is most likely to occur if lung recruitability is high?
A. Driving pressure will increase and compliance will decrease.
B. Driving pressure will decrease and compliance will increase.
C. Plateau pressure will decrease while PEEP increases.
D. Tidal volume will increase due to improved compliance.
Correct Answer: B. Driving pressure will decrease and compliance will increase.
Rationale: In a highly recruitable lung, increasing PEEP can recruit collapsed alveoli,
improving compliance. With volume-controlled ventilation, if compliance improves, the
plateau pressure (and driving pressure) for the same tidal volume would decrease. Thus,
driving pressure decreases and compliance increases.
Page 3
, Why Wrong:
A - If recruitment occurs, compliance improves, not worsens.
C - Plateau pressure is the sum of PEEP and driving pressure; if compliance improves,
driving pressure decreases, but PEEP itself adds to plateau pressure.
D - Tidal volume is set on the ventilator and does not change with compliance unless
the mode allows it.
Reference: ARDSNet. (2024). Ventilation with lower tidal volumes as compared with
traditional tidal volumes. NEJM, 342(18), 1301-1308.
Q3. A clinician is interpreting a pulmonary function test. The FEV1/FVC ratio is
0.65, and the FEV1 is 55% of predicted. The flow-volume loop shows a concave
appearance on the expiratory limb. The patient's lung volumes reveal an increased
RV and TLC. Which of the following conditions is most consistent with these
findings?
A. Restrictive lung disease with a low TLC and normal FEV1/FVC.
B. Obstructive lung disease with air trapping and hyperinflation.
C. Upper airway obstruction with a flattened inspiratory loop.
D. Mixed restrictive and obstructive pattern with reduced TLC.
Correct Answer: B. Obstructive lung disease with air trapping and hyperinflation.
Rationale: The reduced FEV1/FVC ratio, concave expiratory flow-volume loop, and
increased RV and TLC are hallmark findings of obstructive lung disease (e.g., COPD) with
air trapping and hyperinflation. Restrictive disease would show a low TLC and normal or
high FEV1/FVC.
Why Wrong:
A - Restrictive disease would have a decreased TLC and normal FEV1/FVC.
C - Upper airway obstruction typically shows a flattened inspiratory loop and a
normal FEV1/FVC.
D - Mixed patterns are possible but the described lung volumes are more consistent
with obstruction.
Reference: Ruppel, G.L. (2025). Manual of Pulmonary Function Testing, 12th Ed., Ch. 5.
Q4. A patient on mechanical ventilation has the following arterial blood gas: pH 7.20,
PaCO2 60 mm Hg, PaO2 50 mm Hg, HCO3- 24 mEq/L. The ventilator settings are:
assist/control volume ventilation, tidal volume 500 mL, respiratory rate 12/min, FIO2
0.5, PEEP 5 cm H2O. Which of the following changes is most appropriate to improve
oxygenation without worsening the respiratory acidosis?
A. Increase FIO2 to 1.0 and add 10 cm H2O PEEP.
B. Increase respiratory rate to 16/min and increase PEEP to 10 cm H2O.
C. Increase tidal volume to 600 mL and increase FIO2 to 0.8.
Page 4
Edition | 200 Verified Questions - 190 Questions with Answers
NBRC TMC/CRT/RRT Exam 2026-190 QUESTIONS AND ANSWERS ALREADY GRADED A+. 100% Verified
Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive study guide is meticulously crafted for respiratory therapy candidates preparing
for the National Board for Respiratory Care (NBRC) Therapist Multiple-Choice (TMC) Examination,
as well as the Certified Respiratory Therapist (CRT) and Registered Respiratory Therapist (RRT)
credentialing exams. With 200 verified questions and detailed rationales, this resource covers all
essential domains, from patient data evaluation and equipment management to therapeutic procedures
and disease management. Updated for the 2026/2027 academic year, it reflects the latest exam
guidelines and clinical best practices, ensuring you are fully prepared to achieve a high score and earn
your credentials with confidence.
Key Features:
Patient Data Evaluation and Assessment
Interpretation of Clinical Data and Diagnostic Tests
Respiratory Pharmacology and Medication Administration
Oxygen and Medical Gas Therapy
Humidity and Aerosol Therapy
Airway Management and Clearance Techniques
Mechanical Ventilation: Principles and Modes
Mechanical Ventilation: Weaning and Monitoring
Pulmonary Function Testing and Spirometry
Arterial Blood Gas Analysis and Hemodynamics
Cardiopulmonary Resuscitation and Emergency Procedures
Respiratory Diseases: Pathophysiology and Management
Neonatal and Pediatric Respiratory Care
Home Care and Pulmonary Rehabilitation
Infection Control and Safety Practices
Patient Education and Communication
Updates for 2026:
- Updated to reflect the latest NBRC examination content matrix for 2026-2027.
- Incorporates current evidence-based clinical practice guidelines from AARC and other professional bodies.
- Revised rationales to align with the most recent respiratory care protocols and standards.
- Expanded question bank to 200 items, covering all exam domains with increased depth.
- Enhanced answer explanations to clarify common misconceptions and reinforce key concepts.
Abstract:
This exam preparation document is an authoritative resource for candidates seeking the Certified Respiratory
Therapist (CRT) and Registered Respiratory Therapist (RRT) credentials through the National Board for
Respiratory Care (NBRC). The Therapist Multiple-Choice (TMC) Examination is a critical step in the
credentialing process, and this guide provides a comprehensive review of all tested content areas. With 200
high-yield questions, each accompanied by detailed rationales, this document facilitates active learning and
self-assessment. The content is organized according to the NBRC exam matrix, covering patient data evaluation,
equipment application, therapeutic procedures, and disease management. Emphasis is placed on clinical reasoning
Page 1
,and decision-making, mirroring the exam's focus on real-world scenarios. Updated for the 2026/2027 testing cycle,
this guide ensures that candidates are exposed to the most current standards and practices in respiratory care. By
mastering these questions, candidates will enhance their knowledge, identify areas for further study, and build the
confidence needed to excel on the TMC exam and advance to the clinical simulation portion of the RRT
credentialing process.
Keywords:
NBRC TMC exam, CRT certification, RRT credential, Respiratory therapy exam prep, TMC practice questions,
Respiratory care study guide, 2026-2027 exam review
Answer Format:
Each question is presented in a multiple-choice format with four options, followed by the correct answer and a
comprehensive rationale explaining why it is correct. Additionally, incorrect options are analyzed to clarify
common pitfalls and reinforce understanding of the underlying concepts.
Compliance Checklist:
Aligned with the latest NBRC TMC/CRT/RRT exam content matrix.
Updated to reflect 2026/2027 clinical practice guidelines.
Includes rationales for both correct and incorrect answers.
Covers all major domains and subdomains of the exam.
Designed to simulate the actual exam difficulty and format.
Suitable for self-assessment and targeted review.
Content Area Overview:
Content Area Questions Key Topics Weight
Patient Data Evaluation and 1-25 Patient history, physical exam, vital signs, 12.5%
Assessment laboratory data
Clinical Data Interpretation and 26-50 ABGs, pulmonary function tests, imaging, 12.5%
Diagnostics hemodynamics
Respiratory Pharmacology 51-70 Bronchodilators, anti-inflammatory agents, 10%
mucolytics, drug delivery
Oxygen and Medical Gas 71-90 Oxygen delivery devices, titration, safety, 10%
Therapy medical gases
Humidity and Aerosol Therapy 91-110 Humidification, nebulizers, MDIs, DPIs 10%
Airway Management and 111-130 Intubation, extubation, suctioning, chest 10%
Clearance physiotherapy
Mechanical Ventilation 131-160 Modes, settings, monitoring, weaning, 15%
troubleshooting
Cardiopulmonary Resuscitation 161-175 ACLS, airway emergencies, ventilator 7.5%
and Emergency Care emergencies
Respiratory Diseases and 176-190 COPD, asthma, ARDS, pneumonia, 7.5%
Management pulmonary embolism
Neonatal and Pediatric 191-200 Neonatal resuscitation, pediatric ventilation, 5%
Respiratory Care congenital anomalies
Page 2
,Q1. During a pressure-controlled ventilation (PCV) mode, the inspiratory flow
waveform is observed to decelerate and the patient's spontaneous inspiratory effort is
detected. If the set pressure support is 10 cm H2O above PEEP and the patient's flow
demand exceeds the set flow, what is the most likely effect on the airway pressure
waveform?
A. Pressure will remain constant at the set level due to the pressure-regulating
mechanism.
B. The pressure waveform will show a downward deflection during inspiration.
C. The pressure waveform will show an upward deflection above the set pressure.
D. The pressure waveform will become square, indicating flow starvation.
Correct Answer: B. The pressure waveform will show a downward deflection during
inspiration.
Rationale: In PCV, if the patient's inspiratory flow demand exceeds the set flow, the airway
pressure will dip below the set level during inspiration, creating a characteristic 'scooped'
appearance on the pressure-time waveform. This indicates flow starvation and inadequate
pressure support.
Why Wrong:
A - Pressure does not remain constant if flow demand exceeds supply; it drops.
C - Pressure does not exceed the set level in PCV unless there is an obstruction or
coughing.
D - A square pressure waveform indicates a constant pressure plateau, not flow
starvation.
Reference: Ruppel, G.L. (2025). Manual of Pulmonary Function Testing, 12th Ed., Ch. 8.
Q2. A patient with acute respiratory distress syndrome (ARDS) is on
volume-controlled ventilation with a tidal volume of 6 mL/kg ideal body weight. The
plateau pressure is 30 cm H2O, and the driving pressure is 15 cm H2O. The patient's
static compliance is 40 mL/cm H2O. If the PEEP is increased from 10 to 15 cm H2O,
which of the following changes is most likely to occur if lung recruitability is high?
A. Driving pressure will increase and compliance will decrease.
B. Driving pressure will decrease and compliance will increase.
C. Plateau pressure will decrease while PEEP increases.
D. Tidal volume will increase due to improved compliance.
Correct Answer: B. Driving pressure will decrease and compliance will increase.
Rationale: In a highly recruitable lung, increasing PEEP can recruit collapsed alveoli,
improving compliance. With volume-controlled ventilation, if compliance improves, the
plateau pressure (and driving pressure) for the same tidal volume would decrease. Thus,
driving pressure decreases and compliance increases.
Page 3
, Why Wrong:
A - If recruitment occurs, compliance improves, not worsens.
C - Plateau pressure is the sum of PEEP and driving pressure; if compliance improves,
driving pressure decreases, but PEEP itself adds to plateau pressure.
D - Tidal volume is set on the ventilator and does not change with compliance unless
the mode allows it.
Reference: ARDSNet. (2024). Ventilation with lower tidal volumes as compared with
traditional tidal volumes. NEJM, 342(18), 1301-1308.
Q3. A clinician is interpreting a pulmonary function test. The FEV1/FVC ratio is
0.65, and the FEV1 is 55% of predicted. The flow-volume loop shows a concave
appearance on the expiratory limb. The patient's lung volumes reveal an increased
RV and TLC. Which of the following conditions is most consistent with these
findings?
A. Restrictive lung disease with a low TLC and normal FEV1/FVC.
B. Obstructive lung disease with air trapping and hyperinflation.
C. Upper airway obstruction with a flattened inspiratory loop.
D. Mixed restrictive and obstructive pattern with reduced TLC.
Correct Answer: B. Obstructive lung disease with air trapping and hyperinflation.
Rationale: The reduced FEV1/FVC ratio, concave expiratory flow-volume loop, and
increased RV and TLC are hallmark findings of obstructive lung disease (e.g., COPD) with
air trapping and hyperinflation. Restrictive disease would show a low TLC and normal or
high FEV1/FVC.
Why Wrong:
A - Restrictive disease would have a decreased TLC and normal FEV1/FVC.
C - Upper airway obstruction typically shows a flattened inspiratory loop and a
normal FEV1/FVC.
D - Mixed patterns are possible but the described lung volumes are more consistent
with obstruction.
Reference: Ruppel, G.L. (2025). Manual of Pulmonary Function Testing, 12th Ed., Ch. 5.
Q4. A patient on mechanical ventilation has the following arterial blood gas: pH 7.20,
PaCO2 60 mm Hg, PaO2 50 mm Hg, HCO3- 24 mEq/L. The ventilator settings are:
assist/control volume ventilation, tidal volume 500 mL, respiratory rate 12/min, FIO2
0.5, PEEP 5 cm H2O. Which of the following changes is most appropriate to improve
oxygenation without worsening the respiratory acidosis?
A. Increase FIO2 to 1.0 and add 10 cm H2O PEEP.
B. Increase respiratory rate to 16/min and increase PEEP to 10 cm H2O.
C. Increase tidal volume to 600 mL and increase FIO2 to 0.8.
Page 4
