Achive your Success with Latest NBRC RPFT Exam [Dec 28, 2025]
The RPFT Exam Test For Brief Preparation
NEW QUESTION # 13
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 75 µL with a 2.0 mL initial saline dose in the nebulizer. The technologist should
- A. Clean and reevaluate this nebulizer.
- B. Add an exhalation filter and proceed with testing patients.
- C. Accept the results and begin using the device.
- D. Open the vent before starting the bronchial challenge.
Answer: C
NEW QUESTION # 14
The following biologic control measurements are obtained:
Which of the following patterns appears in this plot?
- A. In control
- B. Shift
- C. Drift
- D. Noise
Answer: D
NEW QUESTION # 15
During an exercise study, the RER will equal the RQ only when the patient is at
- A. Steady state
- B. Rest
- C. The anaerobic threshold
- D. Peak exercise
Answer: A
NEW QUESTION # 16
Which of the following is the most reliable indicator that a patient has achieved his maximum exercise capacity during a progressive exercise (stress) test?
- A. Minute ventilation greater than 170 L/min
- B. Respiratory exchange ratio greater than 0.8
- C. VO2remains stable with increasing workload
- D. Heart rate of 210/min
Answer: C
NEW QUESTION # 17
In which of the following patients would an end-tidal CO2most likely produce values that are inconsistent with PaCO2?
- A. 20 year old who smokes cigarettes
- B. 12 year old with kyphoscoliosis
- C. 50 year old with mild scleroderma
- D. 42 year old with moderate COPD
Answer: D
NEW QUESTION # 18
During a linearity check of a flow sensor in a plethysmograph with a 3-liter calibration syringe, a pulmonary function technologist observes the following:
Which of the following should the technologist do?
- A. Record these results and begin testing.
- B. Look for an obstruction in the flow sensor.
- C. Perform an additional flow check at 10 L/sec.
- D. Recalibrate and repeat the linearity check.
Answer: B
NEW QUESTION # 19
The following blood gas report is questioned by the attending physician:
Which of the following values is INCONSISTENT?
- A. BE
- B. PaCO2
- C. pH
- D. HCO3
Answer: A
NEW QUESTION # 20
A pulmonary function technologist is asked to select gas concentrations to simulate pediatric patients' exhaled concentrations during a DLco simulation. Which of the following FECO concentrations should the technologist select?
- A. 0.300
- B. 0.200
- C. 0.100
- D. 0.400
Answer: A
NEW QUESTION # 21
The following data are observed during an exercise test:
Which of the following should a pulmonary function technologist do?
- A. Discontinue the test after the next stage.
- B. Continue the test until the patient is symptomatic.
- C. Discontinue the test and ensure patient safety.
- D. Continue the test until the patient reaches maximal tolerance.
Answer: C
NEW QUESTION # 22
During a bronchial provocation study, a patient has the following spirometric values after a 0.25 mg/mL dose of methacholine:
Based on these results, a pulmonary function technologist should
- A. Stop the test and immediately administer a bronchodilaior.
- B. Instruct the patient to blow out longer and repeat the effort.
- C. Instruct the patient to blow out harder and repeat the effort.
- D. Reduce the concentration of methacholine on the next trial.
Answer: B
NEW QUESTION # 23 
The ECG above is recorded during the recovery phase immediately following termination of an ergo meter exercise study. A pulmonary function technologist should
- A. Continue the cool-down phase
- B. Have the patient lie down
- C. Initiate chest compressions
- D. Check the electrode connections
Answer: C
NEW QUESTION # 24
After finishing the exercise portion of a test for exercise-induced bronchospasm, a patient
complains of difficulty "catching her breath." A pulmonary function technologist should
- A. Have the patient perform an FVC maneuver.
- B. Give the patient a bronchodilator.
- C. Instruct the patient to breathe normally.
- D. Administer oxygen at 2 L/min.
Answer: B
NEW QUESTION # 25
The following data were obtained from a bronchial challenge test:
APC20of 2 mg/mL was obtained the next day in another laboratory. Which of the following is the most likely explanation for these data?
- A. The two test results are within day-to-day variability.
- B. The patient's effort was inconsistent.
- C. Incorrect doses of methacholine were administered.
- D. The spirometer accuracy drifted during the test.
Answer: D
NEW QUESTION # 26
While assessing a patient's expired gases at rest prior to exercise, a pulmonary function technologist calculates the RER as 0.6. Which of the following is the most likely explanation?
- A. The patient is hyperventilating
- B. The patient has an elevated VDAVT
- C. A gas analyzer is malfunctioning
- D. The expired gas is contaminated with air
Answer: C
NEW QUESTION # 27
Prior to performing a multiple-breath U2 washout test, a pulmonary function technologist is unable to zero the H2 gas analyzer. Which of the following may be responsible?
- A. Condensation of water
- B. Exhausted fuel cell
- C. Inadequate vacuum
- D. Chopper motor failure
Answer: A
NEW QUESTION # 28
A patient who smokes three packs of cigarettes a day has a DLco Of 45% of predicted. The patient is referred for exercise (stress) testing. Which of the following should a pulmonary function technologist select to evaluate oxygenation?
- A. End-tidal oxygen tension
- B. Pulse oximetry
- C. Arterial blood gas analysis
- D. Transcutaneous oxygen electrode
Answer: C
NEW QUESTION # 29
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