The Registered Respiratory Therapist (RRT) credential, awarded by the National Board for Respiratory Care (NBRC), is the gold standard of respiratory therapy certification in the United States. Earning the RRT distinguishes you from Certified Respiratory Therapists (CRTs) and is required or preferred for advanced practice roles in ICUs, neonatal units, and pulmonary rehabilitation. The pathway to RRT involves two high-stakes exams — the Therapist Multiple-Choice (TMC) and the Clinical Simulation Examination (CSE) — both of which demand thorough preparation.
This page provides a free RRT practice test PDF you can download and print for offline study. The questions cover the full range of NBRC content areas, including pulmonary anatomy, respiratory assessment, mechanical ventilation, and emergency care. Use this PDF as a supplement to your TMC and CSE preparation to identify weak areas, reinforce core concepts, and build test-taking confidence.
A thorough understanding of pulmonary anatomy is the foundation of the RRT exam. You need to know the structural organization of the respiratory system from the nose and pharynx through the larynx, trachea, bronchi, bronchioles, and alveoli, as well as the mechanics of ventilation — how pressure gradients drive airflow during inspiration and expiration. The relationship between lung volumes and capacities (tidal volume, inspiratory reserve volume, expiratory reserve volume, residual volume, functional residual capacity, total lung capacity, vital capacity) appears consistently in TMC questions.
Gas exchange physiology is equally critical. The alveolar gas equation (PAO2 = FiO2 × (Pb − PH2O) − PaCO2/R) is used to calculate the alveolar-arterial oxygen gradient, which is an indicator of ventilation-perfusion mismatch. Understanding the oxyhemoglobin dissociation curve — how pH, temperature, PaCO2, and 2,3-DPG shift the curve left or right — is essential for interpreting ABG results and clinical scenarios involving hypoxemia.
Ventilation-perfusion (V/Q) mismatch is a high-yield topic. Shunt (V/Q = 0) produces hypoxemia that does not respond well to supplemental oxygen. Dead space ventilation (V/Q = infinity) wastes ventilation without gas exchange. Most clinical lung disease involves a spectrum between these extremes. The NBRC tests your ability to identify the cause of hypoxemia from a clinical scenario and select the appropriate intervention — whether that means increasing FiO2, applying PEEP, or adjusting minute ventilation.
Patient assessment is the entry point for every clinical decision in respiratory therapy. The NBRC tests your ability to interpret physical examination findings (breath sounds, work of breathing, accessory muscle use, cyanosis, clubbing), vital signs, and diagnostic data. Auscultation findings carry significant weight: crackles (rales) suggest fluid or atelectasis, wheezes suggest bronchospasm, rhonchi suggest secretions, and the absence of breath sounds may indicate pneumothorax, pleural effusion, or complete obstruction.
Pulmonary function testing (PFT) is a core competency. You must be able to distinguish obstructive patterns (decreased FEV1/FVC ratio, air trapping) from restrictive patterns (decreased TLC, normal or elevated FEV1/FVC). Common obstructive diseases include COPD, asthma, and cystic fibrosis; common restrictive diseases include pulmonary fibrosis, neuromuscular weakness, and obesity hypoventilation. Bronchodilator response (improvement in FEV1 ≥12% and ≥200 mL post-bronchodilator) indicates reversible obstruction consistent with asthma.
Arterial blood gas (ABG) interpretation is tested in virtually every section of the TMC and CSE. The systematic approach — check pH for acidosis/alkalosis, check PaCO2 for respiratory component, check HCO3 for metabolic component, assess compensation, calculate A-a gradient — must be automatic. Common clinical scenarios include respiratory acidosis in COPD exacerbation, metabolic acidosis in sepsis, mixed disorders in critically ill patients, and the use of permissive hypercapnia in lung-protective ventilation strategies.
Mechanical ventilation is the highest-stakes topic on the RRT exam and the core skill of advanced respiratory therapy practice. You must understand the indications for intubation and mechanical ventilation (acute respiratory failure, airway protection, apnea, refractory hypoxemia), the basic modes of ventilation (volume control, pressure control, SIMV, pressure support, CPAP, BiPAP), and how to set and adjust ventilator parameters (tidal volume, respiratory rate, FiO2, PEEP, I:E ratio, trigger sensitivity).
Lung-protective ventilation for ARDS is a mandatory NBRC topic. The ARDSNet protocol specifies tidal volumes of 4-8 mL/kg predicted body weight, plateau pressure under 30 cmH2O, and appropriate PEEP titration. The rationale — reducing volutrauma and barotrauma in stiff, heterogeneous lungs — and the consequences of deviation are tested in CSE clinical simulations. You need to know when permissive hypercapnia is acceptable, how to calculate predicted body weight, and how to respond to patient-ventilator dyssynchrony.
Weaning from mechanical ventilation is another high-yield area. Daily spontaneous breathing trials (SBT) are the standard approach for assessing extubation readiness. The rapid shallow breathing index (RSBI = f/VT; threshold below 105) predicts successful weaning. Other criteria include adequate oxygenation (PaO2/FiO2 above 200, PEEP at or below 5-8 cmH2O), hemodynamic stability, and the ability to follow commands and protect the airway. Post-extubation stridor, reintubation criteria, and high-flow nasal cannula as a bridge are also tested.
Emergency respiratory care scenarios are a major component of the CSE and appear throughout the TMC. You must be able to rapidly assess and manage acute respiratory failure, tension pneumothorax, status asthmaticus, pulmonary embolism, foreign body obstruction, and cardiopulmonary arrest. The ability to prioritize interventions under simulated time pressure is what separates CSE preparation from simple memorization.
Neonatal and pediatric respiratory emergencies carry specific content weight on the RRT exam. Neonatal respiratory distress syndrome (RDS), transient tachypnea of the newborn (TTN), meconium aspiration syndrome, and bronchopulmonary dysplasia are all tested. Surfactant administration, neonatal CPAP, and high-frequency ventilation are interventions you must understand in clinical context, including dosing, delivery technique, and monitoring.
Code management requires knowledge of BLS and ACLS algorithms, including correct bag-mask ventilation technique, endotracheal tube confirmation (waveform capnography, bilateral breath sounds, absence of epigastric sounds), and the respiratory therapist's role in resuscitation. The NBRC tests both technical skills and clinical judgment — for example, recognizing when to abandon bag-mask ventilation in favor of advanced airway management, or when waveform capnography readings suggest return of spontaneous circulation before a pulse check confirms it.
Passing the NBRC exams requires both broad content knowledge and the clinical judgment to apply it under pressure. The best preparation combines thorough concept review with extensive practice question drilling. Get started with our rrt practice test library, where you can work through questions organized by content area with detailed answer explanations tied directly to NBRC objectives.