[TMC/CSE RESPIRATORY THERAPY EXAM] – QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Core Domains:
- Patient Assessment and Diagnostic Testing
- Airway Management and Emergency Care
- Mechanical Ventilation and Critical Care Management
- Cardiorespiratory Pharmacology and Therapeutics
- Neonatal and Pediatric Respiratory Care
- Pulmonary Function Testing and Rehabilitation
- Professional Practice, Ethics, and Regulatory Compliance
Introduction:
This comprehensive examination is designed to evaluate the advanced
competencies and clinical readiness of respiratory therapy candidates
seeking professional certification and licensure. The assessment
rigorously measures core foundational theories, applied clinical
knowledge, and adherence to legal, regulatory, and ethical standards.
Featuring a robust balance of multiple-choice and complex scenario-
based items, the assessment emphasizes real-world application, critical
thinking, and rapid clinical decision-making. Candidates must
demonstrate expert proficiency in diagnostic evaluation, emergency
response, mechanical ventilation troubleshooting, and patient
management across diverse clinical environments.
SECTION ONE: QUESTIONS 1–100
A 56-year-old male with a history of COPD is admitted to the
emergency department in acute respiratory distress. His arterial
blood gas results on room air show pH 7.31, PaCO2 65 mmHg,
PaO2 50 mmHg, and HCO3 32 mEq/L. Which of the following
initial oxygen delivery devices is most appropriate to manage his
hypoxemia without worsening his hypercapnia?
A. Non-rebreather mask at 15 L/min
B. Nasal cannula at 6 L/min
C. Venturi mask delivering 24 percent oxygen
D. Simple face mask at 10 L/min
,🟢 C. Venturi mask delivering 24 percent oxygen
🔴 Explanation: Patients with chronic hypercapnic respiratory failure
rely on hypoxic drive and are vulnerable to oxygen-induced
hypercapnia. A Venturi mask provides precise and controlled FiO2
delivery, making it the safest choice to correct hypoxemia while
minimizing the risk of worsening hypercapnia.
A respiratory therapist is reviewing the pulmonary function test
results of a patient with suspected restrictive lung disease. Which
of the following spirometric findings is diagnostic of a restrictive
defect?
A. Reduced forced expiratory volume in one second to forced vital
capacity ratio
B. Decreased total lung capacity below the fifth percentile
C. Increased residual volume to total lung capacity ratio
D. Prolonged expiratory phase during tidal breathing
🟢 B. Decreased total lung capacity below the fifth percentile
🔴 Explanation: A restrictive ventilatory defect is definitively diagnosed
by a total lung capacity below the fifth percentile or 80 percent of the
predicted value. A reduced ratio indicates obstruction, not restriction.
During a routine ventilator check on a patient receiving volume-
controlled ventilation, the high-pressure alarm activates
continuously. The peak inspiratory pressure has risen from 28 cm
H2O to 45 cm H2O, while the plateau pressure remains
unchanged at 22 cm H2O. What is the most likely cause of this
finding?
A. Pulmonary fibrosis
B. Mucus plugging in the endotracheal tube
C. Acute respiratory distress syndrome
D. Tension pneumothorax
🟢 B. Mucus plugging in the endotracheal tube
🔴 Explanation: An elevated peak inspiratory pressure with a normal
plateau pressure indicates an increase in airway resistance rather than
a decrease in lung compliance. Secretions or kinking in the artificial
airway increase resistance.
, A patient with severe asthma is intubated and mechanically
ventilated. Auscultation reveals absent breath sounds on the right
side, tracheal deviation to the left, and subcutaneous emphysema
in the neck. Which immediate intervention should the respiratory
therapist perform?
A. Obtain a stat chest radiograph
B. Increase the ventilator tidal volume
C. Perform needle decompression of the right chest
D. Administer a nebulized bronchodilator
🟢 C. Perform needle decompression of the right chest
🔴 Explanation: The clinical presentation of absent breath sounds,
tracheal deviation, and subcutaneous emphysema indicates a tension
pneumothorax, which causes hemodynamic collapse and requires
immediate needle decompression before diagnostic imaging.
Which of the following ethical principles supports a competent
adult patient's right to refuse life-sustaining mechanical
ventilation?
A. Beneficence
B. Nonmaleficence
C. Autonomy
D. Justice
🟢 C. Autonomy
🔴 Explanation: The principle of autonomy asserts that competent
individuals have the moral and legal right to self-determination,
including the decision to accept or refuse medical treatments.
A premature infant born at 28 weeks gestation develops
worsening respiratory distress shortly after birth. Chest
radiography reveals a ground-glass appearance and air
bronchograms throughout both lung fields. This presentation is
most characteristic of which of the following conditions?
A. Meconium aspiration syndrome
B. Transient tachypnea of the newborn
C. Respiratory distress syndrome
D. Congenital diaphragmatic hernia
, 🟢 C. Respiratory distress syndrome
🔴 Explanation: Infant respiratory distress syndrome is caused by
surfactant deficiency in premature infants, leading to alveolar collapse,
decreased compliance, and the classic ground-glass appearance on
chest radiographs.
A respiratory therapist is calibrating a Clark polarographic oxygen
analyzer. The device reads 20.8 percent when exposed to room
air, but fails to read 100 percent when exposed to pure oxygen.
What is the most likely issue?
A. Exhausted chemical electrolyte gel or fouled platinum cathode
B. Low internal battery voltage
C. Barometric pressure fluctuation
D. Moisture condensation in the sensor membrane
🟢 A. Exhausted chemical electrolyte gel or fouled platinum cathode
🔴 Explanation: Failure to calibrate at the higher concentration point
typically indicates a depleted electrolyte solution or a contaminated
sensor surface that limits current generation at higher oxygen partial
pressures.
A patient is receiving pressure-support ventilation at 10 cm H2O
with a positive end-expiratory pressure of 5 cm H2O. The
therapist notes frequent auto-triggering on the ventilator
waveform. Which of the following adjustments should be made?
A. Increase the flow-trigger sensitivity threshold
B. Decrease the backup respiratory rate
C. Make the pressure support level more negative
D. Switch the mode to continuous mandatory ventilation
🟢 A. Increase the flow-trigger sensitivity threshold
🔴 Explanation: Auto-triggering occurs when the ventilator interprets
circuit noise, cardiac oscillations, or water movement as patient effort.
Increasing the trigger threshold makes the machine less sensitive,
resolving the false triggering.
Which of the following legal doctrines establishes that an
employer is liable for the negligent acts of an employee
committed within the scope of their employment?
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Core Domains:
- Patient Assessment and Diagnostic Testing
- Airway Management and Emergency Care
- Mechanical Ventilation and Critical Care Management
- Cardiorespiratory Pharmacology and Therapeutics
- Neonatal and Pediatric Respiratory Care
- Pulmonary Function Testing and Rehabilitation
- Professional Practice, Ethics, and Regulatory Compliance
Introduction:
This comprehensive examination is designed to evaluate the advanced
competencies and clinical readiness of respiratory therapy candidates
seeking professional certification and licensure. The assessment
rigorously measures core foundational theories, applied clinical
knowledge, and adherence to legal, regulatory, and ethical standards.
Featuring a robust balance of multiple-choice and complex scenario-
based items, the assessment emphasizes real-world application, critical
thinking, and rapid clinical decision-making. Candidates must
demonstrate expert proficiency in diagnostic evaluation, emergency
response, mechanical ventilation troubleshooting, and patient
management across diverse clinical environments.
SECTION ONE: QUESTIONS 1–100
A 56-year-old male with a history of COPD is admitted to the
emergency department in acute respiratory distress. His arterial
blood gas results on room air show pH 7.31, PaCO2 65 mmHg,
PaO2 50 mmHg, and HCO3 32 mEq/L. Which of the following
initial oxygen delivery devices is most appropriate to manage his
hypoxemia without worsening his hypercapnia?
A. Non-rebreather mask at 15 L/min
B. Nasal cannula at 6 L/min
C. Venturi mask delivering 24 percent oxygen
D. Simple face mask at 10 L/min
,🟢 C. Venturi mask delivering 24 percent oxygen
🔴 Explanation: Patients with chronic hypercapnic respiratory failure
rely on hypoxic drive and are vulnerable to oxygen-induced
hypercapnia. A Venturi mask provides precise and controlled FiO2
delivery, making it the safest choice to correct hypoxemia while
minimizing the risk of worsening hypercapnia.
A respiratory therapist is reviewing the pulmonary function test
results of a patient with suspected restrictive lung disease. Which
of the following spirometric findings is diagnostic of a restrictive
defect?
A. Reduced forced expiratory volume in one second to forced vital
capacity ratio
B. Decreased total lung capacity below the fifth percentile
C. Increased residual volume to total lung capacity ratio
D. Prolonged expiratory phase during tidal breathing
🟢 B. Decreased total lung capacity below the fifth percentile
🔴 Explanation: A restrictive ventilatory defect is definitively diagnosed
by a total lung capacity below the fifth percentile or 80 percent of the
predicted value. A reduced ratio indicates obstruction, not restriction.
During a routine ventilator check on a patient receiving volume-
controlled ventilation, the high-pressure alarm activates
continuously. The peak inspiratory pressure has risen from 28 cm
H2O to 45 cm H2O, while the plateau pressure remains
unchanged at 22 cm H2O. What is the most likely cause of this
finding?
A. Pulmonary fibrosis
B. Mucus plugging in the endotracheal tube
C. Acute respiratory distress syndrome
D. Tension pneumothorax
🟢 B. Mucus plugging in the endotracheal tube
🔴 Explanation: An elevated peak inspiratory pressure with a normal
plateau pressure indicates an increase in airway resistance rather than
a decrease in lung compliance. Secretions or kinking in the artificial
airway increase resistance.
, A patient with severe asthma is intubated and mechanically
ventilated. Auscultation reveals absent breath sounds on the right
side, tracheal deviation to the left, and subcutaneous emphysema
in the neck. Which immediate intervention should the respiratory
therapist perform?
A. Obtain a stat chest radiograph
B. Increase the ventilator tidal volume
C. Perform needle decompression of the right chest
D. Administer a nebulized bronchodilator
🟢 C. Perform needle decompression of the right chest
🔴 Explanation: The clinical presentation of absent breath sounds,
tracheal deviation, and subcutaneous emphysema indicates a tension
pneumothorax, which causes hemodynamic collapse and requires
immediate needle decompression before diagnostic imaging.
Which of the following ethical principles supports a competent
adult patient's right to refuse life-sustaining mechanical
ventilation?
A. Beneficence
B. Nonmaleficence
C. Autonomy
D. Justice
🟢 C. Autonomy
🔴 Explanation: The principle of autonomy asserts that competent
individuals have the moral and legal right to self-determination,
including the decision to accept or refuse medical treatments.
A premature infant born at 28 weeks gestation develops
worsening respiratory distress shortly after birth. Chest
radiography reveals a ground-glass appearance and air
bronchograms throughout both lung fields. This presentation is
most characteristic of which of the following conditions?
A. Meconium aspiration syndrome
B. Transient tachypnea of the newborn
C. Respiratory distress syndrome
D. Congenital diaphragmatic hernia
, 🟢 C. Respiratory distress syndrome
🔴 Explanation: Infant respiratory distress syndrome is caused by
surfactant deficiency in premature infants, leading to alveolar collapse,
decreased compliance, and the classic ground-glass appearance on
chest radiographs.
A respiratory therapist is calibrating a Clark polarographic oxygen
analyzer. The device reads 20.8 percent when exposed to room
air, but fails to read 100 percent when exposed to pure oxygen.
What is the most likely issue?
A. Exhausted chemical electrolyte gel or fouled platinum cathode
B. Low internal battery voltage
C. Barometric pressure fluctuation
D. Moisture condensation in the sensor membrane
🟢 A. Exhausted chemical electrolyte gel or fouled platinum cathode
🔴 Explanation: Failure to calibrate at the higher concentration point
typically indicates a depleted electrolyte solution or a contaminated
sensor surface that limits current generation at higher oxygen partial
pressures.
A patient is receiving pressure-support ventilation at 10 cm H2O
with a positive end-expiratory pressure of 5 cm H2O. The
therapist notes frequent auto-triggering on the ventilator
waveform. Which of the following adjustments should be made?
A. Increase the flow-trigger sensitivity threshold
B. Decrease the backup respiratory rate
C. Make the pressure support level more negative
D. Switch the mode to continuous mandatory ventilation
🟢 A. Increase the flow-trigger sensitivity threshold
🔴 Explanation: Auto-triggering occurs when the ventilator interprets
circuit noise, cardiac oscillations, or water movement as patient effort.
Increasing the trigger threshold makes the machine less sensitive,
resolving the false triggering.
Which of the following legal doctrines establishes that an
employer is liable for the negligent acts of an employee
committed within the scope of their employment?
