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Updated: Jul 06, 2026
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NBRC Registry Examination for Advanced Pulmonary Function Technologists Sample Questions:
1. 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 initial O2concentration in the syringe was greater than 0.21.
B) The nitrogen analyzer gain was set too low.
C) There was an air leak in the system.
D) The volume was not corrected from ATPS to BTPS.
2. To assure linearity of an oxygen analyzer, calibrate with
A) Three test gases within the operating range of the instrument
B) Two test gases within the operating range of the instrument
C) Air
D) 100% 02
3. The following biologic control data ranges were established:
The following additional data were obtained when assessing the equipment:
Which of the following should a pulmonary function technologist do?
A) Check the flow sensor.
B) Change the CO2and H2O absorbers.
C) Change the DLcoCO analyzer.
D) Continue testing patients.
4. A 9-year-old girl had an FVC of 2.35 L1 year ago. She was 122 cm (4 ft) tall and weighed 29.5 kg (65 lb).
Her current height is 127 cm (4 ft 2 in), and her weight is 34 kg (75 lb). The current FVC measurement is 2.20
L. The quality of both tests met ATS/ERS goals. A pulmonary function technologist should conclude the change is
A) Significant since her weight has changed.
B) Significant since a decline is not expected.
C) Not significant since it is within normal test variability.
D) Not significant since it is less than a 15% decrease.
5. 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
A) 13%
B) 17%
C) 67%
D) 20%
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: A | Question # 3 Answer: A | Question # 4 Answer: B | Question # 5 Answer: A |
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