TMC EXAM 3 Latest 2026 Actual Questions and
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Which of the following equipment is The correct answer is : C
most helpful at measuring FRC in a
patient who has significant non- Explanation : You can determine FRC in three
ventilated lung spaces? different ways - body box, nitrogen washout, or
helium dilution. If someone has non-ventilated
A. nitrogen analyzer for a nitrogen lung space, nitrogen washout and helium dilution
washout test are not helpful and may be inaccurate. FRC
B. helium analyzer for a helium determined by body box will be higher because
dilution test it can access non-ventilated lung space and
C. plethysmograph therefore is more accurate.
D. peak flow meter
,The respiratory therapist is making a The correct answer is : C
home visit to evaluate an oxygen-
dependent patient. The patient has Explanation : Right-sided preload is another
3+ pitting peripheral edema and has name for CVP (central venous pressure).
not followed the physician's orders Peripheral edema is one of the signs associated
to limit fluid intake. You would with right heart failure, which results in an
expect which of the following elevated CVP with a normal or low pulmonary
hemodynamic values? artery pressure (PAP), a.k.a. right ventricular
afterload.
A. elevated PCWP with a low
cardiac output
B. low mean arterial pressure
C. elevated right sided preload with
a normal to low right ventricular
after load
D. reduced cardiac index
A ventilator-dependent patient is The correct answer is : B
scheduled for an MRI, which will
require a transport of 90 minutes. Explanation : A heat moisture exchanger (HME) is
The patient is receiving appropriate for a transport of only 90 min.
humidification with a heated- Furthermore, the scenario does not suggest that
humidification system. A transport the patient has thick, retained secretions,
ventilator is available. How should a therefore an HME may be applied.
respiratory therapist assure that
humidification will be provided to
the patient during the MRI
procedure?
A. Provide a pass-over humidifier
B. Provide an HME
C. Provide ventilation with a manual
resuscitator
D. Use the same humidification
system in use on the primary
ventilator
,Which of the following conditions The correct answer is : D
would benefit most from
polysomnography? Explanation : Polysomnography is another word
for sleep study. An obese patient who has
A. COPD daytime sleepiness would benefit most from
B. congestive heart failure polysomnography. Keep in mind that
C. suspected increased airway Polysomnography is the study of the problem -
resistance not the solution. But it must be done for
D. obesity with increased day-time diagnostic purposes and in order to find the
sleepiness adequate CPAP setting.
Which of the following can The correct answer is : C
accurately be stated about a
widening alveolar-arterial oxygen Explanation : A normal alveolar arterial oxygen
gradient? gradient is below 65 mmHg. When that gradient
rises to 200, 300, 400, or more, then you have
A. decreased venous admixture what is called shunting. If the A-a gradient is less
B. onset of oxygen toxicity than 300 it's technically called a ventilation
C. increased intrapulmonary perfusion (VQ) mismatch. But generally speaking,
shunting as the gradient widens it can properly be said
D. improving V/Q mismatch that there is an increase in pulmonary shunting.
, How many hours will an H cylinder The correct answer is : C
with 1400 psi last for a patient
receiving oxygen at 7 lpm? Explanation : And H cylinder has a tank factor of
3.14. 3.14x1400 PSI = 4396 L. 4396 L / 7 L per
A. 6 hours minute = 628 min. 628 min./ 60 min.= 10.4 hours, or
B. less than 1 hour about 10 hours. When you get an answer that is
C. 10 hours not exact, pick the closest number possible. It is
D. 4 hours common on the exam not see the exact answer
from your calculation. This is because the NBRC
knows that you're estimating.
The respiratory therapist notes a fall The correct answer is : B
in pulse from 80/min to 60/min with
a proportional drop in blood Explanation : During suctioning, a patient's heart
pressure during a suction rate may fall. This is a normal physiological
procedure. Which of the following response associated with the vagal reflex, or the
would be the most likely cause of vagal nerve response. This response will also
these observations? lower blood pressure.
A. Copious secretions
B. Vagal reflex
C. Transient hypoxemia
D. Suction pressure is too high
A bronchopleural fistula on a The correct answer is : C
patient receiving mechanical
ventilation with a chest tube Explanation : A bronchopleural fistula is
drainage system in place would be essentially a leak from the airway in the lungs to
most likely be indicated by which of the pleural space. This condition can result in two
the following observations? things - one) a low-pressure or low-volume
alarm, 2) excess bubbling in the water seal
A. occasional low-exhaled volume chamber of the chest tube drainage system.
alarm When you look at the answers, a leak would not
B. high pressure ventilator alarm cause a high pressure alarm.
C. excess bubbling in the water seal
chamber
D. I:E ratio alarms
Verified Answers () A+ Grade 100%
Guarantee Verified by Experts
Save
Terms in this set (140)
Which of the following equipment is The correct answer is : C
most helpful at measuring FRC in a
patient who has significant non- Explanation : You can determine FRC in three
ventilated lung spaces? different ways - body box, nitrogen washout, or
helium dilution. If someone has non-ventilated
A. nitrogen analyzer for a nitrogen lung space, nitrogen washout and helium dilution
washout test are not helpful and may be inaccurate. FRC
B. helium analyzer for a helium determined by body box will be higher because
dilution test it can access non-ventilated lung space and
C. plethysmograph therefore is more accurate.
D. peak flow meter
,The respiratory therapist is making a The correct answer is : C
home visit to evaluate an oxygen-
dependent patient. The patient has Explanation : Right-sided preload is another
3+ pitting peripheral edema and has name for CVP (central venous pressure).
not followed the physician's orders Peripheral edema is one of the signs associated
to limit fluid intake. You would with right heart failure, which results in an
expect which of the following elevated CVP with a normal or low pulmonary
hemodynamic values? artery pressure (PAP), a.k.a. right ventricular
afterload.
A. elevated PCWP with a low
cardiac output
B. low mean arterial pressure
C. elevated right sided preload with
a normal to low right ventricular
after load
D. reduced cardiac index
A ventilator-dependent patient is The correct answer is : B
scheduled for an MRI, which will
require a transport of 90 minutes. Explanation : A heat moisture exchanger (HME) is
The patient is receiving appropriate for a transport of only 90 min.
humidification with a heated- Furthermore, the scenario does not suggest that
humidification system. A transport the patient has thick, retained secretions,
ventilator is available. How should a therefore an HME may be applied.
respiratory therapist assure that
humidification will be provided to
the patient during the MRI
procedure?
A. Provide a pass-over humidifier
B. Provide an HME
C. Provide ventilation with a manual
resuscitator
D. Use the same humidification
system in use on the primary
ventilator
,Which of the following conditions The correct answer is : D
would benefit most from
polysomnography? Explanation : Polysomnography is another word
for sleep study. An obese patient who has
A. COPD daytime sleepiness would benefit most from
B. congestive heart failure polysomnography. Keep in mind that
C. suspected increased airway Polysomnography is the study of the problem -
resistance not the solution. But it must be done for
D. obesity with increased day-time diagnostic purposes and in order to find the
sleepiness adequate CPAP setting.
Which of the following can The correct answer is : C
accurately be stated about a
widening alveolar-arterial oxygen Explanation : A normal alveolar arterial oxygen
gradient? gradient is below 65 mmHg. When that gradient
rises to 200, 300, 400, or more, then you have
A. decreased venous admixture what is called shunting. If the A-a gradient is less
B. onset of oxygen toxicity than 300 it's technically called a ventilation
C. increased intrapulmonary perfusion (VQ) mismatch. But generally speaking,
shunting as the gradient widens it can properly be said
D. improving V/Q mismatch that there is an increase in pulmonary shunting.
, How many hours will an H cylinder The correct answer is : C
with 1400 psi last for a patient
receiving oxygen at 7 lpm? Explanation : And H cylinder has a tank factor of
3.14. 3.14x1400 PSI = 4396 L. 4396 L / 7 L per
A. 6 hours minute = 628 min. 628 min./ 60 min.= 10.4 hours, or
B. less than 1 hour about 10 hours. When you get an answer that is
C. 10 hours not exact, pick the closest number possible. It is
D. 4 hours common on the exam not see the exact answer
from your calculation. This is because the NBRC
knows that you're estimating.
The respiratory therapist notes a fall The correct answer is : B
in pulse from 80/min to 60/min with
a proportional drop in blood Explanation : During suctioning, a patient's heart
pressure during a suction rate may fall. This is a normal physiological
procedure. Which of the following response associated with the vagal reflex, or the
would be the most likely cause of vagal nerve response. This response will also
these observations? lower blood pressure.
A. Copious secretions
B. Vagal reflex
C. Transient hypoxemia
D. Suction pressure is too high
A bronchopleural fistula on a The correct answer is : C
patient receiving mechanical
ventilation with a chest tube Explanation : A bronchopleural fistula is
drainage system in place would be essentially a leak from the airway in the lungs to
most likely be indicated by which of the pleural space. This condition can result in two
the following observations? things - one) a low-pressure or low-volume
alarm, 2) excess bubbling in the water seal
A. occasional low-exhaled volume chamber of the chest tube drainage system.
alarm When you look at the answers, a leak would not
B. high pressure ventilator alarm cause a high pressure alarm.
C. excess bubbling in the water seal
chamber
D. I:E ratio alarms
