NBRC RT Exam Practice Test: Free 2027 Respiratory Therapy (CRT and RRT) Questions

250 practice questions for the NBRC Respiratory Therapy (RT) Examination, the one exam for both the CRT and the RRT starting January 1, 2027. They follow its Detailed Content Outline, weighted the way the real exam is: the Breadth of Knowledge portion (Patient Data 25 of 160 scored questions, Devices and Patient Safety 25, Initiation and Modification of Interventions 50) and the new Depth of Clinical Judgment portion (60 patient cases, 50 adult and 10 children and newborns). The cases read like a shift: the COPD patient whose pH is sliding on BiPAP, the plateau pressure at 34, the newborn who is still apneic at 30 seconds. Each question is tagged to its outline code, so your score report shows exactly where you miss, and every answer explains why the best choice is best and names its public source.

The real test: 185 multiple-choice questions (160 scored, 25 unscored pretest) in 4 hours. From January 1, 2027 this one exam replaces the TMC: the low cut score earns the CRT and the high cut score earns the RRT, and the NBRC has not published the cut score numbers. It has a Breadth of Knowledge portion (100 questions: patient data, devices and safety, interventions) and a Depth of Clinical Judgment portion (60 patient cases, adults and children). Our practice test is full length, 160 scored questions plus 25 unscored, split like the outline, passing at 70% (112 of 160).

Here: 250 questions. Our own practice questions, built on the NBRC RT Examination Detailed Content Outline (effective January 2027) and written from public sources (AARC clinical practice guidelines, GOLD, GINA, the ARDS Network, ATS/ERS, CDC, the AHA, the AAP and standard respiratory care texts), with every answer's source named. Topics are the outline's three breadth sections and its adult and child clinical judgment cases. Not NBRC's test questions. Free.

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What's on the test

TopicOn the testIn the guide
I. Patient Data~2539
II. Devices and Patient Safety~2539
III. Initiation and Modification of Interventions~5078
IV. Clinical Judgment: Adults~5078
V. Clinical Judgment: Children and Newborns~1016

"On the test" is the rough share of a 160-question test for each topic, following the exam's published weights.

10 sample questions

  1. A patient on warfarin is scheduled for a bronchoscopy with transbronchial biopsy this morning. The chart shows an INR of 3.6. What should the therapist do?

    • A.Tell the physician before the procedure starts
    • B.Proceed, since the INR only matters for surgery under general anesthesia
    • C.Give vitamin K from the crash cart
    • D.Proceed, but have extra suction ready, since biopsy bleeding is usually minor
    Show answer

    A. Tell the physician before the procedure starts

    RT-1 · I. Patient Data
  2. An E cylinder of oxygen reads 1,500 psi and the patient needs 3 L/min for transport. About how long will it last? (E cylinder factor 0.28 L/psi)

    • A.About 140 minutes
    • B.About 14 minutes
    • C.About 500 minutes
    • D.About 45 minutes
    Show answer

    A. About 140 minutes

    RT-40 · II. Devices and Patient Safety
  3. What cuff pressure range is usually recommended for an adult endotracheal tube?

    • A.40 to 50 cm H2O
    • B.5 to 10 cm H2O
    • C.20 to 30 cm H2O
    • D.Whatever pressure stops all leaks, even above 50 cm H2O
    Show answer

    C. 20 to 30 cm H2O

    RT-79 · III. Initiation and Modification of Interventions
  4. A 70-year-old with COPD was intubated for hypercapnic failure. On VC, rate 18, VT 500 mL, she has a measured auto-PEEP of 9 cm H2O and her blood pressure is falling. Which change helps most?

    • A.Add an end-inspiratory pause of 1 second to every breath
    • B.Raise the rate to 24
    • C.Raise the VT to 650 mL
    • D.Lower the rate to lengthen expiratory time
    Show answer

    D. Lower the rate to lengthen expiratory time

    RT-157 · IV. Clinical Judgment: Adults
  5. A 4-month-old with RSV bronchiolitis has nasal congestion, retractions, a respiratory rate of 64 and SpO2 of 88% on room air. Which plan fits the pediatric guideline?

    • A.Nasal suctioning and oxygen; no routine albuterol or steroids
    • B.Routine antibiotics and a chest film every day until the cough is gone
    • C.Albuterol every 2 hours and oral steroids
    • D.Chest physiotherapy every 4 hours to loosen the mucus
    Show answer

    A. Nasal suctioning and oxygen; no routine albuterol or steroids

    RT-235 · V. Clinical Judgment: Children and Newborns
  6. Which lab result best supports a diagnosis of allergic asthma or allergic bronchopulmonary aspergillosis?

    • A.A high troponin
    • B.A high total serum IgE
    • C.A low hemoglobin with small red cells
    • D.A low platelet count with a normal white cell count and a normal differential
    Show answer

    B. A high total serum IgE

    RT-2 · I. Patient Data
  7. An air-entrainment (Venturi) mask set for 40% runs at 8 L/min of oxygen. The air-to-oxygen ratio at 40% is about 3:1. What total flow reaches the patient?

    • A.About 24 L/min
    • B.About 32 L/min
    • C.About 8 L/min
    • D.About 11 L/min
    Show answer

    B. About 32 L/min

    RT-41 · II. Devices and Patient Safety
  8. Which catheter size is right for suctioning through a 7.5 mm adult endotracheal tube, if it should block no more than half the lumen?

    • A.16 Fr
    • B.18 Fr
    • C.10 to 12 Fr
    • D.6 Fr
    Show answer

    C. 10 to 12 Fr

    RT-80 · III. Initiation and Modification of Interventions
  9. A man with severe COPD has been on the ventilator 4 days. His baseline PaCO2 at home was 58 mm Hg. On the current settings his ABG is pH 7.52, PaCO2 38, HCO3 31. What should be done?

    • A.Raise the rate to bring the PaCO2 to 30
    • B.Give sodium bicarbonate to bring the pH down while keeping the same settings
    • C.Keep the settings, since a PaCO2 of 38 is normal
    • D.Lower the minute ventilation toward his usual PaCO2
    Show answer

    D. Lower the minute ventilation toward his usual PaCO2

    RT-158 · IV. Clinical Judgment: Adults
  10. A 2-year-old has a barking cough, hoarse voice and stridor at rest that started at night after a cold. What should be given?

    • A.Dexamethasone, and nebulized racemic epinephrine for stridor at rest
    • B.Antibiotics and a throat exam with a tongue blade to look for pus
    • C.A bronchodilator by DPI
    • D.Nothing, since croup always gets better without any treatment
    Show answer

    A. Dexamethasone, and nebulized racemic epinephrine for stridor at rest

    RT-236 · V. Clinical Judgment: Children and Newborns
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