NBRC MOCK TMC EXAM 2024/2025 WITH 100% ACCURATE ANSWERS
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Course
NBRC
Institution
NBRC
A patient is receiving O2 from an E cylinder at 4 L/min through a nasal cannula. The cylinder pressure is 1900 psig. How long will the cylinder run until it is empty?
A. 47 min
B. 1.7 h
C. 2.2 h
D. 3.6 h - Precise Answer E cylinder = 0.28
1900x0.28/4 = 133/60 = 2.21
Answer: C. 2 hours, ...
NBRC MOCK TMC EXAM 2024/2025
WITH 100% ACCURATE ANSWERS
A patient is receiving O2 from an E cylinder at 4 L/min through a nasal cannula. The cylinder pressure is
1900 psig. How long will the cylinder run until it is empty?
A. 47 min
B. 1.7 h
C. 2.2 h
D. 3.6 h - Precise Answer ✔✔E cylinder = 0.28
1900x0.28/4 = 133/60 = 2.21
Answer: C. 2 hours, 21 minutes
After the Respiratory Therapist sets up a nonrebreathing mask on a patient at a flow rate of 10 L/min,
the reservoir bag collapses before the patient finishes inspiring. The RT should do which of the
following?
A. Change to a simple mask at a flow rate of 10 L/min
B. Remove the one-way valve from the exhalation port.
C. Place the patient on continuous positive airway pressure (CPAP)
D. Increase the flow rate to 15 L/min - Precise Answer ✔✔D. Increase the flow rate to 15 L/min
A patient with carbon monoxide (CO) poisoning can best be treated with which of the following
therapies?
The following blood gas levels have been obtained from a patient using a 60% aerosol mask.
pH: 7.47
PaCO2: 31 mmHg
PaO2: 58 mmHg
What should the RT recommend at this time?
A. Place the patient on CPAP
B. Increase the O2 to 70%
C. Intubate and place the patient on mechanical ventilation
D. Change to a nonrebreathing mask - Precise Answer ✔✔A. Place the patient on CPAP
Given the following data, what is the patient's total arterial O2 content?
pH: 7.41
PaCO2: 37 mmHg
PaO2: 88 mmHg
HCO3: 26 mEq/L
SaO2: 95%
Hb: 14 g/dL
A. 12 mL/dL
B. 14 mL/dL
C. 16 mL/dL
D. 18 mL/dL - Precise Answer ✔✔(Hb x 1.36 x SaO2) + (0.003 x PaO2)
(14 x 1.36 x 0.95) + (0.003 x 88)
, 18.088 + 0.264
= 18.352
Answer: D. 18 mL/dL
The respiratory therapist receives an order to set up a moderate level of O2 on a patient who arrives in
the ED breathing at a rate of 35 breaths/min. Which of the following O2 delivery devices is most
appropriate to use in this situation?
A. Simple O2 mask at 10 L/min
B. Nasal cannula at 4 L/min
C. NRB Mask at 15 L/min
D. Air-entrainment mask at 40% O2 - Precise Answer ✔✔D. Air-entrainment mask at 40% O2
A severe COPD patient arrives in the emergency department on a 2 L/min nasal cannula. Arterial blood
gas results follow:
pH: 7.32
PaCO2: 67 mmHg
PaO2: 62 mmHg
HCO3: 38 mEq/L
Which of the following is the most appropriate recommendation?
A. Increase the liter flow to 4 L/min
B. Maintain the current O2 level
C. Institute noninvasive positive pressure ventilation (NPPV)
D. Place on a NRB mask at 12 L/min - Precise Answer ✔✔B. Maintain the current O2 level
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