Achieve The Utmost Performance In RPFT Exam Pass Guaranteed [Q66-Q83]

RPFT NBRC

admin • January 22, 2026

Achieve The Utmost Performance In RPFT Exam Pass Guaranteed [Q66-Q83]

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Achieve The Utmost Performance In RPFT Exam Pass Guaranteed

Achive your Success with Latest NBRC RPFT Exam

NEW QUESTION 66
Which of the following is the most reliable method to estimate the effectiveness of standard procedures to minimize the risk of cross-contamination during spirometry testing in a pulmonary function laboratory?

Count the number of disposable mouthpieces used for 1 week.

Observe the handwashing behavior of each technologist.

Ask patients tested about laboratory hygiene.

Ask technologists if they wash their hands before each test

NEW QUESTION 67
Successive peak flow measurements made with a peak flowmeter on a subject previously diagnosed as having asthma yield the following results:

Which of the following is the best explanation for these?

Condensation of moisture in the peak flowmeter

Normal response

Improper calibration of the peak flowmeter

Increasing airways resistance in the subject

Explanation/Reference:

NEW QUESTION 68
The following data are observed during an exercise test:

Which of the following should a pulmonary function technologist do?

Continue the test until the patient is symptomatic.

Discontinue the test and ensure patient safety.

Discontinue the test after the next stage.

Continue the test until the patient reaches maximal tolerance.

NEW QUESTION 69
A helium dilution test has just been performed on a patient. The following results are obtained:
FRC 5.0 L
VC 4.0 L
ERV 1.5 L
TLC was calculated to be 6.0 L by plethysmography. From this information, a pulmonary function technologist should conclude that the patient

Had inadequate intrapulmonary mixing of inspired gas, resulting in an erroneous FRC.

Did not perform the slow vital capacity properly, resulting in too low an FRC by helium dilution.

Was turned into the helium dilution circuit at a lung volume considerably above FRC.

Did not remain in the helium dilution breathing circuit long enough for equilibration.

Explanation/Reference:

NEW QUESTION 70
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?

Perform an additional flow check at 10 L/sec.

Look for an obstruction in the flow sensor.

Record these results and begin testing.

Recalibrate and repeat the linearity check.

NEW QUESTION 71
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?

An increase of more than 20% in airway resistance

A decline of more than 30% in FEF25-75%

A decline of more than 20% in FEV1

A decline of more than 20% in inspiratory capacity

NEW QUESTION 72
While performing a plethysmographic lung volume test, a technologist observes that the patient’s breathing efforts do not produce consistent pressure fluctuations in the box. Which of the following is the most likely reason for this issue?

Airway obstruction preventing pressure transmission

Leaks in the mouthpiece or tubing

Hyperventilation during the test

Incorrect gas mixture in the box

NEW QUESTION 73
The following blood gas report is questioned by the attending physician:

Which of the following values is INCONSISTENT?

PaCO2

HCO3

NEW QUESTION 74
In a patient with neuromuscular disease, which of the following is the best way to detect airway obstruction?

SGaw

MIP

PEF

MVV

NEW QUESTION 75
The following data are obtained after an exercise (stress) test for exercise-induced asthma:

Based on these data, the post-exercise FEVi represents a decrease of approximately

67%

20%

17%

13%

NEW QUESTION 76
When performing exercise testing on a biologic control, the measurements obtained should be compared with

The patient population that will be tested.

Predicted values used for the biologic control’s height and weight

Previous tests performed on the biologic control.

At least two other biologic controls being tested.

NEW QUESTION 77
Successive peak flow measurements made with a peak flowmeter on a subject previously diagnosed as having asthma yield the following results:

Which of the following is the best explanation for these?

Condensation of moisture in the peak flowmeter

Normal response

Improper calibration of the peak flowmeter

Increasing airways resistance in the subject

NEW QUESTION 78
Results of two blood gas samples drawn from the same patient, 30 minutes apart, are shown below:

Which of the following is the most likely explanation for these differences?

The patient’s minute ventilation has increased.

The patient has developed a pneumothorax.

The 10:30 blood sample has been contaminated with air.

The 10:30 blood sample contains an excess of heparin solution.

NEW QUESTION 79
A 35-year-old healthy male is performing a maximal stress test as part of an annual physical. The following data are observed:

The patient denies any symptoms. Which of the following should a pulmonary function technologist do first?

Obtain an arterial blood gas while continuing exercise

Move the pulse oximeter sensor to another site

Administer oxygen at 3-4 L/min by nasal cannula

Terminate the test and stabilize the patient.

NEW QUESTION 80
The following results were obtained from spirometry before and after a bronchodilator administration:

Which of the following is the correct interpretation of these data?

Restrictive pattern with positive bronchodilator response

Restrictive pattern with no bronchodilator response

Obstructive pattern with positive bronchodilator response

Obstructive pattern with no bronchodilator response

NEW QUESTION 81
A pulmonary function laboratory routinely tests five subjects as biologic controls. Acceptable instrument performance over time is indicated when measurements

For each individual are within 2 standard deviations of the mean of previous measurements for each individual.

For an individual are within 2 standard deviations of the mean of those for the group.

Of the group as a whole agree with those predicted by linear regression for changes in age.

Are within the 95% confidence interval predicted for an individual being tested.

NEW QUESTION 82
When performing quality control in a body plethysmograph using a 5-L isothermal bottle, the VTG at shutter closure are as follows:

A pulmonary function technologist should