NBRC TMC/CRT/RRT EXAM 2025/2026 REAL EXAM
VERSIONS 1,2 AND 3 |ACCURATE AND EXPERT VERIFIED
FOR GUARANTEED PASS | LATEST UPDATE (2025)
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?
- CORRECT ->>Maintain the current O2 level
The physician has ordered O2 to be set up on a patient who has a spontaneous tidal volume of 500 mL
and an inspiratory time of 1 second. Which of the following O2 delivery devices will deliver a flow that
meets or exceeds this patient's inspiratory flow?
500 mL = 0.5 L
0.5/1 = 0.5 L/s (change L/s to? /Min by multiplying by 60
0.5 L x 60= 30 L/min
Select the device that delivers a flow of at least 30L/min
- CORRECT ->>35% air-entrainment mask at 6 L/min
A patient breathing 50% oxygen has a PaO2 of 248 torr. Which of the following should the RT
recommend?
- CORRECT ->>Titrate oxygen to maintain an SpO2 > 93%
Explanation: A PaO2 of 250 torr is normal on 50% O2. Remember, to determine the normal PaO2 on any
given O2%, multiply the O2% by 5. This is an approximation. If titrate was not a choice, then you would
discontinue the oxygen.
A patient is receiving 30% oxygen via an air-entrainment mask at a flow of 5 L/min. The total flow
delivered by this device is which of the following?
(*Use 21 with O2 % less than 40%)
(100- 30%)/ (30%-*21) = 70/9 = 8/1 or 8:1 ratio 8+1= 9
9x5 = 45 L/min
- CORRECT ->>45 L/min
Secretions tend to become thicker if the inspired air has which of the following characteristics?
- CORRECT ->>32 mg H2O per liter of gas
A patient receiving 38 mg H2O per liter of gas from a nebulizer has a humidity deficit of which of the
following?
44-38= 6
- CORRECT ->>6 mg/L
,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?
E cylinder = 0.28 1900x0.28/4 = 133/60 = 2.21
- CORRECT ->>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?
- CORRECT ->>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?
- CORRECT ->>Nonrebreathing mask
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?
- CORRECT ->>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
(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
- CORRECT ->>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?
- CORRECT ->>Air-entrainment mask at 40% O2
After connecting a nasal cannula to the humidifier outlet, you kink the tubing and hear a whistling noise
coming from the humidifier. Which of the following most likely has caused this?
- CORRECT ->>The humidifier has no leaks
You notice that the patient's secretions have become thicker and more difficult to suction since the
ventilator humidifier was replaced with an HME. The RT should recommend which of the following?
- CORRECT ->> Replace the HME with a conventional heated humidifier
, Which of the following are indications for cool, bland aerosol therapy?
A cough must be induced for sputum collection
Mobilization of secretions must be improved
Postextubation inflammation of the upper airway must be treated
- CORRECT ->>1, 2, and 3
You notice that very little mist is being produced by a nebulizer attached to an aerosol mask. Which of the
following could be responsible for this?
The liter flow is too high
The nebulizer jet is clogged with lint
The filter on the capillary tube is obstructed
- CORRECT ->>2 and 3 only
An autoimmune compromised patient is to be placed on oxygen with a humidity/aerosol device. Which of
the following devices is most likely to deliver contaminated water to the patient?
- CORRECT ->>Heated jet nebulizer
To minimize an increased airway resistance produced by high-density aerosol inhalation, the RT should
recommend which of the following?
- CORRECT ->>Administer a bronchodilator along with the aerosol
The RT is asked to recommend a humidifier that will be able to provide the highest water vapor content to
the patient's airway. Which of the following humidifiers should the therapist select?
- CORRECT ->>Heated wick
A heated humidifier is delivering 100% body humidity to a patient's airway. What volume of water is
being delivered?
- CORRECT ->> 44 mg/L
A patient is experiencing cardiac arrhythmias and muscle weakness. An arterial blood gas determines that
the patient is in metabolic alkalosis. Which of the following is the most appropriate lab value to assess at
this time?
- CORRECT ->> Potassium
The term used to describe a condition is which a patient has difficulty breathing while in the supine
position is which of the following?
- CORRECT ->> Orthopnea
A patient enters the emergency department, and on initial examination the RT observes paradoxical chest
movement. Which of the following should the therapist suspect?
- CORRECT ->> Flail chest
Perfusion in the extremities may best be determined by which of the following methods?
- CORRECT ->> Assessing capillary refill
While palpating the chest, the RT determines that there is decreased fremitus over the right lower lobe.
This may be the result of which of the following?
Pneumothorax
VERSIONS 1,2 AND 3 |ACCURATE AND EXPERT VERIFIED
FOR GUARANTEED PASS | LATEST UPDATE (2025)
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?
- CORRECT ->>Maintain the current O2 level
The physician has ordered O2 to be set up on a patient who has a spontaneous tidal volume of 500 mL
and an inspiratory time of 1 second. Which of the following O2 delivery devices will deliver a flow that
meets or exceeds this patient's inspiratory flow?
500 mL = 0.5 L
0.5/1 = 0.5 L/s (change L/s to? /Min by multiplying by 60
0.5 L x 60= 30 L/min
Select the device that delivers a flow of at least 30L/min
- CORRECT ->>35% air-entrainment mask at 6 L/min
A patient breathing 50% oxygen has a PaO2 of 248 torr. Which of the following should the RT
recommend?
- CORRECT ->>Titrate oxygen to maintain an SpO2 > 93%
Explanation: A PaO2 of 250 torr is normal on 50% O2. Remember, to determine the normal PaO2 on any
given O2%, multiply the O2% by 5. This is an approximation. If titrate was not a choice, then you would
discontinue the oxygen.
A patient is receiving 30% oxygen via an air-entrainment mask at a flow of 5 L/min. The total flow
delivered by this device is which of the following?
(*Use 21 with O2 % less than 40%)
(100- 30%)/ (30%-*21) = 70/9 = 8/1 or 8:1 ratio 8+1= 9
9x5 = 45 L/min
- CORRECT ->>45 L/min
Secretions tend to become thicker if the inspired air has which of the following characteristics?
- CORRECT ->>32 mg H2O per liter of gas
A patient receiving 38 mg H2O per liter of gas from a nebulizer has a humidity deficit of which of the
following?
44-38= 6
- CORRECT ->>6 mg/L
,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?
E cylinder = 0.28 1900x0.28/4 = 133/60 = 2.21
- CORRECT ->>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?
- CORRECT ->>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?
- CORRECT ->>Nonrebreathing mask
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?
- CORRECT ->>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
(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
- CORRECT ->>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?
- CORRECT ->>Air-entrainment mask at 40% O2
After connecting a nasal cannula to the humidifier outlet, you kink the tubing and hear a whistling noise
coming from the humidifier. Which of the following most likely has caused this?
- CORRECT ->>The humidifier has no leaks
You notice that the patient's secretions have become thicker and more difficult to suction since the
ventilator humidifier was replaced with an HME. The RT should recommend which of the following?
- CORRECT ->> Replace the HME with a conventional heated humidifier
, Which of the following are indications for cool, bland aerosol therapy?
A cough must be induced for sputum collection
Mobilization of secretions must be improved
Postextubation inflammation of the upper airway must be treated
- CORRECT ->>1, 2, and 3
You notice that very little mist is being produced by a nebulizer attached to an aerosol mask. Which of the
following could be responsible for this?
The liter flow is too high
The nebulizer jet is clogged with lint
The filter on the capillary tube is obstructed
- CORRECT ->>2 and 3 only
An autoimmune compromised patient is to be placed on oxygen with a humidity/aerosol device. Which of
the following devices is most likely to deliver contaminated water to the patient?
- CORRECT ->>Heated jet nebulizer
To minimize an increased airway resistance produced by high-density aerosol inhalation, the RT should
recommend which of the following?
- CORRECT ->>Administer a bronchodilator along with the aerosol
The RT is asked to recommend a humidifier that will be able to provide the highest water vapor content to
the patient's airway. Which of the following humidifiers should the therapist select?
- CORRECT ->>Heated wick
A heated humidifier is delivering 100% body humidity to a patient's airway. What volume of water is
being delivered?
- CORRECT ->> 44 mg/L
A patient is experiencing cardiac arrhythmias and muscle weakness. An arterial blood gas determines that
the patient is in metabolic alkalosis. Which of the following is the most appropriate lab value to assess at
this time?
- CORRECT ->> Potassium
The term used to describe a condition is which a patient has difficulty breathing while in the supine
position is which of the following?
- CORRECT ->> Orthopnea
A patient enters the emergency department, and on initial examination the RT observes paradoxical chest
movement. Which of the following should the therapist suspect?
- CORRECT ->> Flail chest
Perfusion in the extremities may best be determined by which of the following methods?
- CORRECT ->> Assessing capillary refill
While palpating the chest, the RT determines that there is decreased fremitus over the right lower lobe.
This may be the result of which of the following?
Pneumothorax
