NBRC Mock TMC Exam Review with Verified Answers

NBRC MOCK TMC Exam Review v v v v v




Questions & Answers 2026\2027 update v v v v




1. A patient is receiving O2 from an E cylinder at 4 L/min through a nasal can
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nula. The cylinder pressure is 1900 psig. How long will the cylinder run until it i
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s empty?
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A. 47 min v




B. 1. 7 h v v




C. 2.2 h v




D. 3.6 h E cylinder = 0.28 v v v v v




1900x0.28/4 = 133/60 = 2.21
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AnswerC. 2 hours, 21 minutes v v v v v




2. After the RespiratoryTherapist sets up a nonrebreathing mask on a patient at a
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flow rate of 10 L/min, the reservoir bag collapses before the patient
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finishes inspiring. The RT should do which of the following?
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A. Change to a simple mask at a flow rate of 10 L/min v v v v v v v v v v v




B. Remove the one-way valve from the exhalation port. v v v v v v v




C. Place the patient on continuous positive airway pressure (CPAP)
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D. Increase the flow rate to 15 L/min v v v v v v




Answer D. Increase the flow rate to 15 L/min
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,3. A patient with carbon monoxide (CO) poisoning can best be treated with whi
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ch of the following therapies?
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A. Nasal Cannula at 6 L/min v v v v




B. Simple O2 mask at 10 L/min v v v v v




C. CPAP and 60% O2 v v v




D. Nonrebreathing mask v




Answer D. Nonrebreathing mask v v v




4. The following blood gas levels have been obtained from a patient using a 60
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% aerosol mask.
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pH: 7.47 v




PaCO2: 31 mmHg v v




PaO2: 58 mmHg v v




What should the RT recommend at this time?
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A. Place the patient on CPAP v v v v




B. Increase the O2 to 70% v v v v




C. Intubate and place the patient on mechanical ventilation
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D. Change to a nonrebreathing mask An v v v v v




swer A. Place the patient on CPAP
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5. Given the following data, what is the patient's total arterial O2 content?
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, pH 7.41 v




PaCO2 37 mmHg v v




PaO2 88 mmHg v v




HCO3 26 mEq/L v v




SaO2 95% v




Hb 14 g/dL v v




A. 12 mL/dL v




B. 14 mL/dL v




C. 16 mL/dL v




D. 18 mL/dL v




(Hb x 1.36 x SaO2) + (0.003 x PaO2) (14 x 1.36 x
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0.95) + (0.003 x 88) v v v v




1 8.088 + 0.264
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= 1 8.352 v v




Answer
D.1 8 mL/dL v




6. The respiratory therapist receives an order to set up a moderate level of O2 o
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n a patient who arrives in the ED breathing at a rate of 35 breaths/min. Which of t
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he following O2 delivery devices is most appropriate to use in this situation?
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A. Simple O2 mask at 10 L/min v v v v v




B. Nasal cannula at 4 L/min v v v v




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