Passing NBRC RPFT Exam Using 2025 Practice Tests [Q23-Q41]

NO.23 The following blood gas report is questioned by the attending physician:

Which of the following values is INCONSISTENT?

NO.24 A pulmonary function technologist is performing a single-breath diffusion capacity (DLCO) test. Which of the following factors is most likely to cause a falsely elevated DLCO result?

NO.25 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?

NO.26 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?

NO.27 An arterial blood gas performed prior to exercise on a 45-year-old patient shows the following results:

A pulmonary function technologist should conclude that the patient’s

NO.28 Which of the following is correct regarding smoking cessation?

NO.29 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

NO.30 Airways resistance and specific conductance tests are requested for a 7-year-old child with asthma.
Which of the following techniques is preferred?

NO.31 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?

NO.32 During exercise, a subject’s oxygen consumption increases out of proportion to his cardiac output. This is due to an increase in

NO.33 A 54-year-old male who smokes presents to the pulmonary laboratory for chronic cough and dyspnea on exertion. PFT and blood gas results show the following:

Which of the following should the pulmonary function technologist recommend?

NO.34 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?

NO.35 During an exercise study, the RER will equal the RQ only when the patient is at

NO.36 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?

NO.37 During an exercise study, the RER will equal the RQ only when the patient is at

NO.38 A patient has just finished a 6-minute walk test during which she stopped and rested by leaning against a wall several times, while catching her breath. Which of the following should a pulmonary function technologist do?

NO.39 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

NO.40 A 12-year-old patient completed an evaluation for exercise-induced asthma in the pulmonary function laboratory. The patient completed six minutes of exercise on a treadmill with a heart rate of 145 to 150/min.
The following spirometry data were collected:

A pulmonary function technologist should conclude that the exercise test is

NO.41 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