NBRC MOCK TMC Exam Review
Questions & Answers
1. 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 E cylinder = 0.28
1 900x0.28/4 = 1 33/60 = 2.21
Answer C. 2 hours, 21 minutes
2. 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
,Answer D. Increase the flow rate to 1 5 L/min
,3. A patient with carbon monoxide (CO) poisoning can best be treated
with which of the following therapies?
A. Nasal Cannula at 6 L/min
B. Simple O2 mask at 10 L/min
C. CPAP and 60% O2
D. Nonrebreathing mask
Answer D. Nonrebreathing mask
4. 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
Answer A. Place the patient on
CPAP
5. 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
(Hb x 1 .36 x SaO2) + (0.003 x PaO2) (1 4 x 1 .36 x
0.95) + (0.003 x 88)
1 8.088 + 0.264
= 1 8.352
Answer
D.1 8 mL/dL
6. 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
Questions & Answers
1. 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 E cylinder = 0.28
1 900x0.28/4 = 1 33/60 = 2.21
Answer C. 2 hours, 21 minutes
2. 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
,Answer D. Increase the flow rate to 1 5 L/min
,3. A patient with carbon monoxide (CO) poisoning can best be treated
with which of the following therapies?
A. Nasal Cannula at 6 L/min
B. Simple O2 mask at 10 L/min
C. CPAP and 60% O2
D. Nonrebreathing mask
Answer D. Nonrebreathing mask
4. 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
Answer A. Place the patient on
CPAP
5. 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
(Hb x 1 .36 x SaO2) + (0.003 x PaO2) (1 4 x 1 .36 x
0.95) + (0.003 x 88)
1 8.088 + 0.264
= 1 8.352
Answer
D.1 8 mL/dL
6. 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
