NBRC THERAPIST MULTIPLE-CHOICE
(TMC) EXAM
40+ (Latest 2026 Edition) 100% Verified Q&A + Answer Key Solutions
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 42 Qs
This document covers respiratory therapy concepts, specifically focusing on oxygen therapy
management, noninvasive ventilation, oxygen delivery devices, ventilator management, and patient
assessment. It provides 42 questions with correct answers and detailed explanations, making it a
valuable resource for students to review and understand key concepts in respiratory therapy. By utilizing
this document, students can effectively study and review the material, reinforcing their knowledge and
preparing them for the NBRC Therapist Multiple-Choice (TMC) Exam.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
A professional is working on a project and encounters the following situation: A patient is being
treated with oxygen therapy from an E cylinder at 4 L/min via a nasal cannula. The cylinder's pressure
gauge reads 1900 psig. How long will the cylinder supply last until it is empty?
A) 30 minutes
B) 1.5 hours
C) 2.2 hours
D) 4 hours
CORRECT ANSWER
C) 2.2 hours
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, RATIONALE: To calculate the cylinder's supply time, use the formula: (cylinder pressure x flow factor) ÷ flow rate. The
flow factor for an E cylinder is 0.28. Plug in the given values: (1900 x 0.28) ÷ 4 = 133 ÷ 60 ≈ 2.21 hours. This matches
option C, making it the correct answer. Options A and B are too short, and option D is too long, considering the
calculation.
QUESTION 2
In a workplace scenario, a Respiratory Therapist is administering oxygen to a patient using a
nonrebreathing mask at a flow rate of 10 L/min when the reservoir bag collapses before the patient
finishes inspiring.
A) Reduce the flow rate to 8 L/min to conserve oxygen
B) Remove the one-way valve from the exhalation port to improve flow
C) Increase the oxygen flow rate to 15 L/min to meet patient demands
D) Switch to a simple mask to minimize oxygen waste
CORRECT ANSWER
C) Increase the oxygen flow rate to 15 L/min to meet patient demands
RATIONALE: Increasing the oxygen flow rate to 15 L/min will provide a more adequate supply of oxygen to meet the
patient's needs, preventing the reservoir bag from collapsing during inspiration. Reducing the flow rate (A) would
decrease oxygen supply, removing the one-way valve (B) may not address the issue, and switching to a simple mask
(D) would not provide the necessary increase in oxygen flow.
QUESTION 3
A team is reviewing a set of requirements and notices that a patient with suspected carbon monoxide
poisoning requires immediate treatment. Which of the following therapies is most effective in
delivering high-concentration oxygen to the patient?
A) Nasal Cannula at 6 L/min
B) Simple O2 mask at 10 L/min
C) CPAP and 60% O2
D) Nonrebreathing mask with 50% O2 flow
CORRECT ANSWER
D) Nonrebreathing mask with 50% O2 flow
RATIONALE: A nonrebreathing mask provides a high concentration of oxygen with a flow rate of 50% or higher, making
it the most effective option for treating carbon monoxide poisoning. Nasal cannulas and simple oxygen masks have
lower flow rates, while CPAP (continuous positive airway pressure) therapy is not typically used for this condition.
QUESTION 4
During an inspection, the following condition is observed: A patient using a 60% aerosol mask
exhibits elevated pH (7.47), lower than normal PaCO2 (31 mmHg), and moderate PaO2 (58 mmHg).
The respiratory therapist must decide on the best course of action to address the patient's condition.
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, A) Administer a non-invasive mechanical ventilation (NIV) mode
B) Gradually increase the oxygen concentration to 80%
C) Perform endotracheal intubation and transition to invasive mechanical ventilation
D) Recommend a change to a non-rebreather mask with a high FIO2 setting
CORRECT ANSWER
A) Administer a non-invasive mechanical ventilation (NIV) mode
RATIONALE: The patient's elevated pH and decreased PaCO2 indicate respiratory alkalosis, which is a common issue
with mask ventilation, particularly with high-flow oxygen use. Administering CPAP (Continuous Positive Airway Pressure)
can help maintain a safe and effective respiratory rate, preventing the need for intubation or invasive ventilation.
QUESTION 5
A candidate is preparing for a certification and needs to understand how to calculate a patient's total
arterial O2 content. The patient's arterial blood gas (ABG) results are as follows: pH 7.41, PaCO2 37
mmHg, PaO2 88 mmHg, HCO3 26 mEq/L, SaO2 95%, and Hb 14 g/dL. What is the patient's total
arterial O2 content?
A) 10 mL/dL
B) 18 mL/dL
C) 12 mL/dL
D) 15 mL/dL
CORRECT ANSWER
D) 15 mL/dL
RATIONALE: To calculate total arterial O2 content, use the formula (Hb x 1.36 x SaO2) + (0.003 x PaO2). Given the
values, (14 x 1.36 x 0.95) + (0.003 x 88) = 18.088 + 0.264 = 18.352 mL/dL. The closest value is 18 mL/dL. Options A
and C are lower than the calculated value, and option B is higher, while option D is the closest match.
QUESTION 6
In a practical application, a person is asked to select the most appropriate oxygen delivery device for
a patient with a respiratory rate of 35 breaths per minute, and the patient requires a moderate level
of oxygen supplementation.
A) Simple O2 mask at 6 L/min
B) Nasal cannula at 5 L/min
C) NRB mask at 10 L/min
D) Air-entrainment mask at 35% O2
CORRECT ANSWER
D) Air-entrainment mask at 35% O2
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(TMC) EXAM
40+ (Latest 2026 Edition) 100% Verified Q&A + Answer Key Solutions
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 42 Qs
This document covers respiratory therapy concepts, specifically focusing on oxygen therapy
management, noninvasive ventilation, oxygen delivery devices, ventilator management, and patient
assessment. It provides 42 questions with correct answers and detailed explanations, making it a
valuable resource for students to review and understand key concepts in respiratory therapy. By utilizing
this document, students can effectively study and review the material, reinforcing their knowledge and
preparing them for the NBRC Therapist Multiple-Choice (TMC) Exam.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
A professional is working on a project and encounters the following situation: A patient is being
treated with oxygen therapy from an E cylinder at 4 L/min via a nasal cannula. The cylinder's pressure
gauge reads 1900 psig. How long will the cylinder supply last until it is empty?
A) 30 minutes
B) 1.5 hours
C) 2.2 hours
D) 4 hours
CORRECT ANSWER
C) 2.2 hours
Trusted by thousands of students and professionals worldwide Page 1 of 18
, RATIONALE: To calculate the cylinder's supply time, use the formula: (cylinder pressure x flow factor) ÷ flow rate. The
flow factor for an E cylinder is 0.28. Plug in the given values: (1900 x 0.28) ÷ 4 = 133 ÷ 60 ≈ 2.21 hours. This matches
option C, making it the correct answer. Options A and B are too short, and option D is too long, considering the
calculation.
QUESTION 2
In a workplace scenario, a Respiratory Therapist is administering oxygen to a patient using a
nonrebreathing mask at a flow rate of 10 L/min when the reservoir bag collapses before the patient
finishes inspiring.
A) Reduce the flow rate to 8 L/min to conserve oxygen
B) Remove the one-way valve from the exhalation port to improve flow
C) Increase the oxygen flow rate to 15 L/min to meet patient demands
D) Switch to a simple mask to minimize oxygen waste
CORRECT ANSWER
C) Increase the oxygen flow rate to 15 L/min to meet patient demands
RATIONALE: Increasing the oxygen flow rate to 15 L/min will provide a more adequate supply of oxygen to meet the
patient's needs, preventing the reservoir bag from collapsing during inspiration. Reducing the flow rate (A) would
decrease oxygen supply, removing the one-way valve (B) may not address the issue, and switching to a simple mask
(D) would not provide the necessary increase in oxygen flow.
QUESTION 3
A team is reviewing a set of requirements and notices that a patient with suspected carbon monoxide
poisoning requires immediate treatment. Which of the following therapies is most effective in
delivering high-concentration oxygen to the patient?
A) Nasal Cannula at 6 L/min
B) Simple O2 mask at 10 L/min
C) CPAP and 60% O2
D) Nonrebreathing mask with 50% O2 flow
CORRECT ANSWER
D) Nonrebreathing mask with 50% O2 flow
RATIONALE: A nonrebreathing mask provides a high concentration of oxygen with a flow rate of 50% or higher, making
it the most effective option for treating carbon monoxide poisoning. Nasal cannulas and simple oxygen masks have
lower flow rates, while CPAP (continuous positive airway pressure) therapy is not typically used for this condition.
QUESTION 4
During an inspection, the following condition is observed: A patient using a 60% aerosol mask
exhibits elevated pH (7.47), lower than normal PaCO2 (31 mmHg), and moderate PaO2 (58 mmHg).
The respiratory therapist must decide on the best course of action to address the patient's condition.
Trusted by thousands of students and professionals worldwide Page 2 of 18
, A) Administer a non-invasive mechanical ventilation (NIV) mode
B) Gradually increase the oxygen concentration to 80%
C) Perform endotracheal intubation and transition to invasive mechanical ventilation
D) Recommend a change to a non-rebreather mask with a high FIO2 setting
CORRECT ANSWER
A) Administer a non-invasive mechanical ventilation (NIV) mode
RATIONALE: The patient's elevated pH and decreased PaCO2 indicate respiratory alkalosis, which is a common issue
with mask ventilation, particularly with high-flow oxygen use. Administering CPAP (Continuous Positive Airway Pressure)
can help maintain a safe and effective respiratory rate, preventing the need for intubation or invasive ventilation.
QUESTION 5
A candidate is preparing for a certification and needs to understand how to calculate a patient's total
arterial O2 content. The patient's arterial blood gas (ABG) results are as follows: pH 7.41, PaCO2 37
mmHg, PaO2 88 mmHg, HCO3 26 mEq/L, SaO2 95%, and Hb 14 g/dL. What is the patient's total
arterial O2 content?
A) 10 mL/dL
B) 18 mL/dL
C) 12 mL/dL
D) 15 mL/dL
CORRECT ANSWER
D) 15 mL/dL
RATIONALE: To calculate total arterial O2 content, use the formula (Hb x 1.36 x SaO2) + (0.003 x PaO2). Given the
values, (14 x 1.36 x 0.95) + (0.003 x 88) = 18.088 + 0.264 = 18.352 mL/dL. The closest value is 18 mL/dL. Options A
and C are lower than the calculated value, and option B is higher, while option D is the closest match.
QUESTION 6
In a practical application, a person is asked to select the most appropriate oxygen delivery device for
a patient with a respiratory rate of 35 breaths per minute, and the patient requires a moderate level
of oxygen supplementation.
A) Simple O2 mask at 6 L/min
B) Nasal cannula at 5 L/min
C) NRB mask at 10 L/min
D) Air-entrainment mask at 35% O2
CORRECT ANSWER
D) Air-entrainment mask at 35% O2
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