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NBRC RPFT - Registry Examination for Advanced Pulmonary Function Technologists
Updated: Sep 03, 2026
Q & A: 117 Questions and Answers
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Updated: Sep 03, 2026
Q & A: 117 Questions and Answers
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| Section | Objectives |
|---|---|
| Patient Assessment and Testing Principles | - Patient preparation and coaching techniques - Pulmonary function test indications and contraindications |
| Pulmonary Function Equipment and Quality Control | - Calibration and maintenance of spirometry systems - Quality assurance and infection control procedures |
| Cardiopulmonary Physiology and Interpretation | - Interpretation of pulmonary function patterns (obstructive, restrictive, mixed) - Gas exchange and acid-base fundamentals |
| Diffusion and Gas Exchange Testing | - DLCO testing principles and interpretation |
| Spirometry and Lung Volume Testing | - Lung volume measurement techniques - Forced vital capacity (FVC) and flow-volume loops |
| Safety, Infection Control, and Patient Care | - Infection prevention in pulmonary testing environments - Emergency procedures and patient safety monitoring |
Question 1
A smoking cessation program using a nicotine patch is started for all smokers in a factory. Results revealed that smokers who reported they had quit had exhaled carbon monoxide levels less than 6 ppm. A pulmonary function technologist should conclude that
A. The smokers were not being truthful about smoking cessation.
B. A different method of smoking cessation should be offered to improve outcomes.
C. The program was effective in accomplishing smoking cessation.
D. The smokers had refrained from smoking for the previous 6 hours.
Question 2
A biologic control subject has a FRCplethof 4.0 ±0.3 L at panting frequencies between 60 and 70/min. During a QC run, the subject pants at55/min and a FRCplethof 3.90 L is recorded.
Which of the following is the most appropriate action to take?
A. Continue using the system because it is within control limits.
B. Take the plethysmograph out of service pending corrective maintenance.
C. Recalibrate the mouth pressure transducer and repeat the test.
D. Repeat the test, coaching the subject to pant more slowly.
Question 3
The following arterial blood gas results are obtained during the final workload of a cardiopulmonary exercise test:
Which of the following best explains these results?
A. The test indicates a right-to-left shunt.
B. IV solution has contaminated the blood sample.
C. Blood gas results are normal for someone at end-exercise.
D. There is air contamination since the PaCO2is so low.
Question 4
An isothermal lung analog has the following specifications:
5-L glass bottle
2000 g of steel wool
Density of steel wool 5 g/cm3
Volume of connectors and bulb 100 mi-Repeated FRC measurements in the plethysmograph result in a volume of 5.5 L.
Which of the following should a pulmonary function technologist do?
A. Begin a biologic control program
B. Recalculate the BTPS correction
C. Take the plethysmograph out of service
D. Remove 500 g of steel wool from the lung analog
Question 5
A polarographic oxygen analyzer used to measure expired gas in a metabolic system should always be calibrated with
A. Oxygen mixtures containing 4% and 8% carbon dioxide
B. Air and fully saturated 100% oxygen.
C. 100% oxygen and 100% nitrogen, fully saturated
D. Gas concentrations higher and lower than the expected measurement
Solutions:
| Question 1 Answer: C | Question 2 Answer: A | Question 3 Answer: C | Question 4 Answer: A | Question 5 Answer: D |
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