INDIANA RESPIRATORY THERAPIST EXAMINATION QUESTIONS AND ANSWERS ALREADY GRADED A+|
100% VERIFIED SOLUTIONS
CORE DOMAINS
• Patient Assessment and Evaluation
• Troubleshooting and Quality Control
• Initiation and Modification of Interventions
• Patient Education and Professional Practice
• Safety and Infection Control
• Pharmacology
INTRODUCTION
This assessment consists of 100 original practice questions designed for the Indiana Respiratory Therapist
Examination. The questions are based on publicly available examination objectives and professional standards
as outlined by the National Board for Respiratory Care (NBRC) and the Indiana State Board of Respiratory Care .
The assessment emphasizes knowledge, application, analysis, critical thinking, and clinical judgment in
respiratory care. These are original practice questions and are not actual, leaked, recalled, secure, or live
examination questions.
Question 1
A respiratory therapist is preparing to perform an arterial blood gas (ABG) puncture on a patient. Which of the
following is the most appropriate site for this procedure?
,A. Brachial artery
B. Femoral artery
C. Radial artery
D. Dorsalis pedis artery
🟢 Correct Answer: C. Radial artery
🔴 RATIONALE: The radial artery is the preferred site for ABG sampling due to its superficial location,
accessibility, and collateral circulation from the ulnar artery. The Allen test should be performed to verify
collateral circulation before puncture . While the brachial (A), femoral (B), and dorsalis pedis (D) arteries can be
used, they are associated with higher risks of complications and are generally considered secondary sites.
Question 2
A patient is receiving oxygen via a Venturi mask set at 40% FiO₂. The therapist notes that the flowmeter is set to
10 L/min. Which of the following is the approximate total output flow from this device?
A. 20 L/min
B. 35 L/min
C. 50 L/min
D. 65 L/min
🟢 Correct Answer: C. 50 L/min
,🔴 RATIONALE: A 40% Venturi mask operating at 10 L/min has an air-to-oxygen ratio of approximately 4:1
(since the ratio is (100-40)/(40-21) = 60/19 ≈ 3.16:1, but for the specific mask it is about 4:1). The total flow is
the oxygen flow plus the entrained air, which is approximately 10 + 40 = 50 L/min .
Question 3
Which of the following laboratory values is most critical to review before initiating mechanical ventilation with
positive end-expiratory pressure (PEEP)?
A. Hemoglobin
B. Serum potassium
C. Arterial blood gas
D. Coagulation studies
🟢 Correct Answer: A. Hemoglobin
🔴 RATIONALE: Hemoglobin is a critical value to review before initiating PEEP because PEEP can decrease
cardiac output and venous return. If the hemoglobin is low, the patient's oxygen-carrying capacity is
compromised, and the use of PEEP may lead to hemodynamic instability. While ABG (C), potassium (B), and
coagulation studies (D) are important, hemoglobin directly impacts the patient's ability to tolerate the
hemodynamic effects of PEEP .
Question 4
, A respiratory therapist is evaluating a patient's peak flow meter reading. The patient's reading is 250 L/min,
which is 50% of their personal best. This finding is most consistent with:
A. Normal lung function
B. Mild airflow obstruction
C. Moderate airflow obstruction
D. Severe airflow obstruction
🟢 Correct Answer: C. Moderate airflow obstruction
🔴 RATIONALE: A peak flow reading of 50% of the personal best is classified as moderate airflow obstruction.
Values between 50-80% indicate a yellow zone (moderate obstruction), while values below 50% indicate a red
zone (severe obstruction). A reading of 250 L/min is 50% of the personal best, placing it in the moderate
obstruction category.
Question 5
A patient is receiving mechanical ventilation with a tidal volume of 500 mL, respiratory rate of 14 breaths/min,
and an inspiratory flow rate of 40 L/min. What is the inspiratory-to-expiratory (I:E) ratio?
A. 1:1
B. 1:2
C. 1:3
D. 2:1
100% VERIFIED SOLUTIONS
CORE DOMAINS
• Patient Assessment and Evaluation
• Troubleshooting and Quality Control
• Initiation and Modification of Interventions
• Patient Education and Professional Practice
• Safety and Infection Control
• Pharmacology
INTRODUCTION
This assessment consists of 100 original practice questions designed for the Indiana Respiratory Therapist
Examination. The questions are based on publicly available examination objectives and professional standards
as outlined by the National Board for Respiratory Care (NBRC) and the Indiana State Board of Respiratory Care .
The assessment emphasizes knowledge, application, analysis, critical thinking, and clinical judgment in
respiratory care. These are original practice questions and are not actual, leaked, recalled, secure, or live
examination questions.
Question 1
A respiratory therapist is preparing to perform an arterial blood gas (ABG) puncture on a patient. Which of the
following is the most appropriate site for this procedure?
,A. Brachial artery
B. Femoral artery
C. Radial artery
D. Dorsalis pedis artery
🟢 Correct Answer: C. Radial artery
🔴 RATIONALE: The radial artery is the preferred site for ABG sampling due to its superficial location,
accessibility, and collateral circulation from the ulnar artery. The Allen test should be performed to verify
collateral circulation before puncture . While the brachial (A), femoral (B), and dorsalis pedis (D) arteries can be
used, they are associated with higher risks of complications and are generally considered secondary sites.
Question 2
A patient is receiving oxygen via a Venturi mask set at 40% FiO₂. The therapist notes that the flowmeter is set to
10 L/min. Which of the following is the approximate total output flow from this device?
A. 20 L/min
B. 35 L/min
C. 50 L/min
D. 65 L/min
🟢 Correct Answer: C. 50 L/min
,🔴 RATIONALE: A 40% Venturi mask operating at 10 L/min has an air-to-oxygen ratio of approximately 4:1
(since the ratio is (100-40)/(40-21) = 60/19 ≈ 3.16:1, but for the specific mask it is about 4:1). The total flow is
the oxygen flow plus the entrained air, which is approximately 10 + 40 = 50 L/min .
Question 3
Which of the following laboratory values is most critical to review before initiating mechanical ventilation with
positive end-expiratory pressure (PEEP)?
A. Hemoglobin
B. Serum potassium
C. Arterial blood gas
D. Coagulation studies
🟢 Correct Answer: A. Hemoglobin
🔴 RATIONALE: Hemoglobin is a critical value to review before initiating PEEP because PEEP can decrease
cardiac output and venous return. If the hemoglobin is low, the patient's oxygen-carrying capacity is
compromised, and the use of PEEP may lead to hemodynamic instability. While ABG (C), potassium (B), and
coagulation studies (D) are important, hemoglobin directly impacts the patient's ability to tolerate the
hemodynamic effects of PEEP .
Question 4
, A respiratory therapist is evaluating a patient's peak flow meter reading. The patient's reading is 250 L/min,
which is 50% of their personal best. This finding is most consistent with:
A. Normal lung function
B. Mild airflow obstruction
C. Moderate airflow obstruction
D. Severe airflow obstruction
🟢 Correct Answer: C. Moderate airflow obstruction
🔴 RATIONALE: A peak flow reading of 50% of the personal best is classified as moderate airflow obstruction.
Values between 50-80% indicate a yellow zone (moderate obstruction), while values below 50% indicate a red
zone (severe obstruction). A reading of 250 L/min is 50% of the personal best, placing it in the moderate
obstruction category.
Question 5
A patient is receiving mechanical ventilation with a tidal volume of 500 mL, respiratory rate of 14 breaths/min,
and an inspiratory flow rate of 40 L/min. What is the inspiratory-to-expiratory (I:E) ratio?
A. 1:1
B. 1:2
C. 1:3
D. 2:1
