RPFT Free Exam Questions and Answers PDF Updated on Nov-2025
Latest RPFT Exam Dumps Recently Updated 117 Questions
NEW QUESTION # 48
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. The volume was not corrected from ATPS to BTPS.
- B. There was an air leak in the system.
- C. The nitrogen analyzer gain was set too low.
- D. The initial O2 concentration in the syringe was greater than 0.21.
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION # 49
A comparison of two techniques for measuring Rawis shown below:
Which of the following should a pulmonary function technologist conclude?
- A. Results are consistent with the two methodologies.
- B. The system was calibrated for quiet breathing.
- C. Subjects 1 and 2 both have reactive airways.
- D. Subject 1 panted too forcefully.
Answer: A
NEW QUESTION # 50
A comparison of two techniques for measuring Rawis shown below:
Which of the following should a pulmonary function technologist conclude?
- A. Results are consistent with the two methodologies.
- B. The system was calibrated for quiet breathing.
- C. Subjects 1 and 2 both have reactive airways.
- D. Subject 1 panted too forcefully.
Answer: A
NEW QUESTION # 51
The desiccant column on an infrared CO2analyzer is pink. The readings obtained from this analyzer would result in
- A. No effect on CO2
- B. Adecreased CO2
- C. An increased CO2
- D. An unstable reading
Answer: C
NEW QUESTION # 52
A pulmonary function technologist reviews the following home monitoring spirometry results:
According to National Asthma Education and Prevention Program (NAEPP) guidelines, what feedback should the technologist give to the patient regarding test performance?
- A. Come into the office for further instructions on proper testing technique.
- B. Ask the patient to blow out longer.
- C. Encourage the patient to continue testing and monitoring the FEW
- D. Ask the patient to recalibrate the spirometer.
Answer: C
NEW QUESTION # 53
The following values are obtained using a 3-liter calibration syringe during volume calibration of a dry-rolling spirometer:
2.80 L
2.79 L
2.82 L
The performance of this spirometer is best described as
- A. Accurate, but not precise.
- B. Precise, but not accurate. .
- C. Both accurate and precise.
- D. Neither accurate nor precise.
Answer: A
NEW QUESTION # 54
A pulmonary function technologist can calculate which of the following if values for pH, PaO2, SaO2, SvO2PvO2, VO2, and Hb areobtained?
- A. VD/VT
- B. RER
- C. Cardiac output
- D. Stroke volume
Answer: C
NEW QUESTION # 55
A patient will undergo bronchial provocation testing with methacholine chloride (Provocholine). Baseline spirometry reveals the FVC is 4.00 L and FEV1is 3.00 L.
The provocative dose 20% (PD20) can be calculated when which of the following measurements occur?
- A. The ratio FEV1/FVC falls below 0.8.
- B. The FVC falls below 3.20 L, or the FEV1falls below 2.40 L.
- C. The FEV, falls below 2.40 L, regardless of change in FVC.
- D. The FVC falls below 3.20 L and the FEV1falls below 2.40 L.
Answer: C
NEW QUESTION # 56
The following test results are available for a 35-year-old subject who is applying for disability:
These findings are consistent with
- A. Occupational asthma
- B. Pulmonary fibrosis
- C. Poor effort
- D. A paralyzed hemidiaphragm
Answer: D
NEW QUESTION # 57
During a cardiopulmonary stress test using breath-by-breath gas analysis, a pulmonary function technologist notices that the VO2 suddenly decreases. Which of the following may explain this change?
1. The patient has achieved anaerobic threshold.
2. The measurement of the expired gas volumes is inaccurate.
3. O2 analyzer "phase delay" has increased.
4. There is a leak in the tubing or mouthpiece.
- A. 1, 2, and 3 only
- B. 2, 3, and 4 only
- C. 1, 2, and 4 only
- D. 1, 3, and 4 only
Answer: D
NEW QUESTION # 58
CORRECT TEXT
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. 0.100
- B. 0.200
- C. 0.300
- D. 0.400
Answer: C
NEW QUESTION # 59
The following results were obtained from spirometry before and after a bronchodilator administration:
Which of the following is the correct interpretation of these data?
- A. Restrictive pattern with positive bronchodilator response
- B. Obstructive pattern with positive bronchodilator response
- C. Obstructive pattern with no bronchodilator response
- D. Restrictive pattern with no bronchodilator response
Answer: D
NEW QUESTION # 60
While performing duplicate blood gas analyses, a pulmonary function technologist notes that the second instrument gives consistently higher values for PaCO2 and PaO2. Which of the following is the most probable cause of higher readings from the second instrument?
- A. The PO2 and PCO2 electrode membranes have protein build-up
- B. The sample chamber has a bacterial contaminate
- C. The sample chamber temperature is greater than 37° C
- D. An excessive delay occurred between running the two samples
Answer: C
NEW QUESTION # 61
A treadmill belt stops for a fraction of a second each time the patient takes a step. A pulmonary function technologist should
- A. Increase the speed of the belt.
- B. Instruct the patient to use the hand rails.
- C. Decrease the treadmill grade.
- D. Tighten the belt.
Answer: D
NEW QUESTION # 62
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. The volume was not corrected from ATPS to BTPS.
- B. There was an air leak in the system.
- C. The nitrogen analyzer gain was set too low.
- D. The initialO2concentration in the syringe was greater than 0.21.
Answer: B
NEW QUESTION # 63
A patient's bronchial provocation test was interpreted as positive for hyperreactive airways.
Considering changes from a pre-challenge baseline, all of the following are consistent with
this interpretation EXCEPT a
- A. 25% decrease in Raw.
- B. 25% increase in FR
- C. 25% decrease in FEF25-75%.
- D. 25% decrease in FEFmax.
Answer: B
NEW QUESTION # 64
Biological control data are obtained for lung volumes by plethysmography. The following results are obtained:
A pulmonary function technologist should repeat the test instructing the individual to
- A. Pant at 90 to 100 Hz
- B. Inhale to TLC
- C. Pant at 40 to 50 Hz
- D. Inhale to TV
Answer: B
NEW QUESTION # 65
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. Variable large airways obstruction
- B. Fixed large airways obstruction.
- C. Small airways obstruction
- D. Restrictive disorder
Answer: D
NEW QUESTION # 66
Treadmill speed can be verified by
- A. Dividing the height by the horizontal distance.
- B. Multiplying the cycles/min by the height.
- C. Dividing the cycles/min by the belt length.
- D. Multiplying the belt length by the cycles/min.
Answer: D
NEW QUESTION # 67
During a cardiopulmonary stress test using breath-by-breath gas analysis, a pulmonary function technologist notices that the VO2suddenly decreases. Which of the following may explain this change?
1.The patient has achieved anaerobic threshold.
2.The measurement of the expired gas volumes is inaccurate.
3.O2analyzer "phase delay" has increased.
4. There is a leak in the tubing or mouthpiece.
- A. 1,2, and 4 only
- B. 1,3, and 4 only
- C. 2,3, and 4 only
- D. 1,2, and 3 only
Answer: B
NEW QUESTION # 68
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 # 69
Which of the following is an appropriate reason to perform a multiple-breath nitrogen washout test?
- A. Differentiate obstruction from restriction.
- B. Measure oxygen consumption.
- C. Measure anatomical dead space.
- D. Detect early small airway disease.
Answer: D
NEW QUESTION # 70
The following values are reported at maximum effort for a 50-year-old, 70-kg (154-lb) male with significant coronary artery disease during ergometer stress testing. Which of the following is most likely an error?
- A. VE65L/min
- B. HR145/min
- C. workload 200 watts
- D. RER1.2
Answer: C
Explanation:
Explanation
NEW QUESTION # 71
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