NBRC RPFT Dumps
| Exam Code | RPFT |
| Exam Name | Registry Examination for Advanced Pulmonary Function Technologists |
| Update Date | 18 Jul, 2026 |
| Total Questions | 115 Questions Answers With Explanation |
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Question # 1
A pulmonary function laboratory routinely tests five subjects as biologic controls. Acceptable instrument performance over time is indicated when measurements
A. For each individual are within 2 standard deviations of the mean of previous
measurements for each individual.
B. For an individual are within 2 standard deviations of the mean of those for the group
C. Of the group as a whole agree with those predicted by linear regression for changes in
age
D. Are within the 95% confidence interval predicted for an individual being tested.
Question # 2
Which of the following thresholds for a clinically significant change in lung function from the beginning to the end of a methacholine challenge test is significant?
A. An increase of more than 20% in airway resistance
B. Adecline of more than 30% in FEF25-75%
C. Adecline of more than 20% in FEV1
D. Adecline of more than 20% in inspiratory capacity
Question # 3
A government agency requires that a pulmonary function technologist establish proceduresto minimize the loss of laboratory data. Which of the following should be included in theseprocedures?1. Continuous mirroring of hard drives2. Storage of duplicate test data offsite3. No Internet connections to the computer storing the database4. Contracting with a third-party security company
A. 2,3, and 4 only
B. 1,3, and 4 only
C. 1,2, and 4 only
D. 1,2, and 3 only
Question # 4
While performing a quality control test on an open circuit nitrogen system, the volume of a 3-liter syringe is measured as 3.9 L. Which of the following is the most probable explanation?
A. There was an air leak in the system.
B. The initialO2concentration in the syringe was greater than 0.21.
C. The volume was not corrected from ATPS to BTPS.
D. The nitrogen analyzer gain was set too low.
Question # 5
A treadmill belt stops for a fraction of a second each time the patient takes a step. A pulmonary function technologist should
A. Instruct the patient to use the hand rails.
B. Tighten the belt.
C. Increase the speed of the belt.
D. Decrease the treadmill grade.
Question # 6
A patient is performing a flow-volume loop. A pulmonary function technologist observes equal decreases in expiratory and inspiratory flows resulting in plateaus. Patient effort is satisfactory, and he follows instructions well. The technologist should expect the patient to have a
A. Small airways obstruction
B. Restrictive disorder
C. Variable large airways obstruction
D. Fixed large airways obstruction.
Question # 7
A pulmonary function technologist is asked to select gas concentrations to simulate pediatric patients' exhaled concentrations during a DLcosimulation. Which of the following FECO concentrations should the technologist select?
A. 0.200
B. 0.300
C. 0.400
D. 0.100
Question # 8
Prior to an exercise study, a pulmonary function technologist finds that the patient's RER is 1.13. Which of the following bestexplains this finding?
A. Carbohydrate metabolism
B. Protein metabolism
C. Hypoventilation
D. Hyperventilation
Question # 9
When selecting gas tanks for a DLcosimulator, which of the following expired CO gas concentrations will produce the highest simulated DLco?
A. 0.08
B. 0.30
C. 0.10
D. 0.15
Question # 10
The desiccant column on an infrared CO2analyzer is pink. The readings obtained from this analyzer would result in
A. Adecreased CO2
B. An increased CO2
C. An unstable reading
D. No effect on CO2
Question # 11
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 program was effective in accomplishing smoking cessation.
B. The smokers had refrained from smoking for the previous 6 hours.
C. The smokers were not being truthful about smoking cessation.
D. Adifferent method of smoking cessation should be offered to improve outcomes.
Question # 12
A pulmonary function technologist is performing quality control on a nebulizer used in the 5- breath dosimeter bronchial challenge. The target output of the device is 0.09 mL, plus or minus 10%. After 10 actuations, the nebulizer output was 75µL with a 2.0 mL initial saline dose in the nebulizer. The technologist should
A. Open the vent before starting the bronchial challenge.
B. Add an exhalation filter and proceed with testing patients.
C. Clean and reevaluate this nebulizer.
D. Accept the results and begin using the device.
Question # 13
A body plethysmograph box pressure transducer fails the electronic calibration check after multiple attempts. Which of the following should a pulmonary function technologist do? 1. Perform a biologic control test2. Inspect the door seal. 3. Re-zero the box pressure transducer. 4. Perform a physical pressure calibration.
A. 1,2, and 4 only
B. 1,3, and 4 only
C. 2,3, and 4 only
D. 1,2, and 3 only
Question # 14
A patient with severe airflow limitation pants too rapidly (> 3 breaths/second) against a closed shutter in a body plethysmograph. Which of the following will occur?
A. VTGunderestimation
B. VTGoverestimation
C. RAWunderestimation
D. RAWoverestimation
Question # 15
Which of the following information reported from a recent methacholine challenge test best summarizes the patient's bronchial hyperresponsiveness?
A. patient reported chest tightness and a cough
B. diluent FEV1= 92% predicted
C. postbronchodilator recovery FEV1=106% baseline
D. PC20= 2.3 mg/mL
Question # 16
While performing duplicate blood gas analyses, a pulmonary function technologist notes that the second instrument gives consistently higher values forPaCO2and PaO2. Which of the following is the most probable cause of higher readings from the second instrument?
A. The sample chamber temperature is greater than 37° C
B. An excessive delay occurredbetween running the two samples
C. The PO2and PCO2electrodemembranes have protein build-up
D. The sample chamber has a bacterial contaminate
Question # 17
A 6-year-old child has a history of repeated episodes of wheezing and shortness of breath. A pulmonary function technologist has difficulty obtaining repeatable spirometry results. Which of the following tests should be performed next?
A. MVV
B. DLco
C. SGaw
D. SpO2
Question # 18
A pulmonary function technologist can calculate which of the following if values for pH, PaO2, SaO2, SvO2PvO2, VO2, and Hb areobtained?
A. Cardiac output
B. RER
C. VD/VT
D. Stroke volume
Question # 19
During an exercise study, the RER will equal the RQ only when the patient is at
A. Steady state
B. Peak exercise
C. The anaerobic threshold
D. Rest
Question # 20
During an exercise study, a pulmonary function technologist notices the systolic blood pressure increased to 270 mm Hg using an automated cuff. Which of the following should the technologist do?
A. Terminate the test and administer oxygen by nasal cannula.
B. Continue the test and recheck blood pressure using manual cuff method
C. Terminate the test at this time and recheck blood pressure.
D. Continue the test if within 5 minutes of completion.
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