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Registered Pulmonary Function Technologist Practice Test

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Exam Code: RPFT
Exam Name: Registered Pulmonary Function Technologist
Number of Questions: 120 multiple-choice questions (100 scored- 20 pretest/unscored).
Time Alloted: 3 hours (180 minutes) to complete the exam
Passing Marks: The NBRC uses a scaled scoring system- with a passing score of 75 (on a scale of 0-100).

- Set Up- Maintain- Calibrate
- Body habitus equipment (for example- stadiometer- body weight scale- caliper)
- Blood gas analyzers
- Spirometers
- Aerosol delivery devices (for example- nebulizers- dosimeters)
- Metered dose or dry powder inhalers
- Valves (for example- directional- demand)
- Gas analyzers (for example- nitrogen- helium- oxygen- methane- CO)
- Body plethysmographs
- Exercise equipment (for example- treadmill- cycle ergometer)
- Field walking test equipment (for example- 6MWT- shuttle walk test)
- ECG monitors
- Gas delivery systems (for example- blenders- flowmeters)
- Pressure measuring devices (for example- manometers- transducers)
- Gas and water absorbers (for example- Drierite®- Nafion™- Perma Pure tubing)
- Emergency management equipment (for example- defibrillator- crash cart)
- Arterial / venous blood collection equipment
- Quality control devices (for example- calibration syringes- manometers- isothermal lung analog)
- Infection control materials / methods (for example- wipes- PPE- sterilization devices- filters)
- Monitors
- pulse oximeters
- blood pressure (for example- manual cuff- automated)

- Troubleshoot
- Body habitus equipment (for example- stadiometer- body weight scale- caliper)
- Blood gas analyzers
- Spirometers
- Aerosol delivery devices (for example- nebulizers- dosimeters)
- Metered dose or dry powder inhalers
- Valves (for example- directional- demand)
- Gas analyzers (for example- nitrogen- helium- oxygen- methane- CO)
- Body plethysmographs
- Exercise equipment (for example- treadmill- cycle ergometer)
- Field walking test equipment (for example- 6MWT- shuttle walk test)
- ECG monitors
- Gas delivery systems (for example- blenders- flowmeters)
- Pressure measuring devices (for example- manometers- transducers)
- Gas and water absorbers (for example- Drierite®- Nafion TM- Perma Pure® tubing)
- Emergency management equipment (for example- defibrillator- crash cart)
- Arterial / venous blood collection equipment
- Quality control devices (for example- calibration syringes- manometers- isothermal lung analog)
- Infection control materials / methods (for example- wipes- PPE- sterilization devices- filters)
- Monitors
- pulse oximeters
- blood pressure (for example- manual cuff- automated)

- Perform Quality Control
- Body habitus equipment (for example- stadiometer- body weight scale- caliper)
- Blood gas analyzers (for example- routine testing- proficiency testing)
- Spirometers
- Aerosol delivery devices (for example- nebulizers- dosimeters)
- Metered dose or dry powder inhalers
- Valves (for example- directional- demand)
- Gas analyzers (for example- nitrogen- helium- oxygen- methane- CO)
- Body plethysmographs
- Exercise equipment (for example- treadmill- cycle ergometer)
- Field walking test equipment (for example- 6MWT- shuttle walk test)

- Select Test Protocols and Equipment
- Body habitus measurements and estimates (for example- height- arm span- ulnar length- weight)
- Spirometry
- standard
- upright / supine
- Inhaled medication delivery (for example- MDI- DPI- nebulizers)
- Blood trial collection (for example- arterial- capillary)
- Sputum trial collection
- Blood gas analysis (for example- pH- PO2- PCO2)
- CO-oximetry / hemoximetry
- Static lung volumes
- gas dilution methods
- body plethysmography
- DLCO
- Instruction for home testing (for example- spirometry- pulse oximetry)
- Patient education (for example- medication delivery- travel- asthma)
- Oxygen assessment / titration at rest and / or exercise
- Exercise testing
- field walking test (for example- 6MWT- shuttle walk test)
- monitored (for example- ECG- blood pressure- SpO2)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example- methacholine- exercise- EVH- mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example- MIP- MEP- cough peak flow)
- Patient safety (for example- standard precautions- adverse events / incidents- cross contamination)

- Perform the Procedure
- Body habitus measurements and estimates (for example- height- arm span- ulnar length- weight)
- Spirometry
- standard
- upright / supine
- Inhaled medication delivery (for example- MDI- DPI- nebulizers)
- Blood trial collection (for example- arterial- capillary)
- Sputum trial collection
- Blood gas analysis (for example- pH- PO2- PCO2)
- CO-oximetry / hemoximetry
- Static lung volumes
- gas dilution methods
- body plethysmography
- DLCO
- Instruction for home testing (for example- spirometry- pulse oximetry)
- Patient education (for example- medication delivery- travel- asthma)
- Oxygen assessment / titration at rest and / or exercise
- Exercise testing
- field walking test (for example- 6MWT- shuttle walk test)
- monitored (for example- ECG- blood pressure- SpO2)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example- methacholine- exercise- EVH- mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example- MIP- MEP- cough peak flow)
- Patient safety (for example- standard precautions- adverse events / incidents- cross contamination)

- Evaluate Validity of Result
- Body habitus measurements and estimates (for example- height- arm span- ulnar length- weight)
- Spirometry
- standard
- upright / supine
- Inhaled medication delivery (for example- MDI- DPI- nebulizers)
- Blood trial collection (for example- arterial- capillary)
- Sputum trial collection
- Blood gas analysis (for example- pH- PO2- PCO2)
- CO-oximetry / hemoximetry
- Static lung volumes
- gas dilution methods
- body plethysmography
- DLCO
- Instruction for home testing (for example- spirometry- pulse oximetry)
- Patient education (for example- medication delivery- travel- asthma)
- Oxygen assessment / titration at rest and / or exercise
- Exercise testing
- field walking test (for example- 6MWT- shuttle walk test)
- monitored (for example- ECG- blood pressure- SpO2)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example- methacholine- exercise- EVH- mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example- MIP- MEP- cough peak flow)
- Patient safety (for example- standard precautions- adverse events / incidents- cross contamination)

- Calculate Results- Select Reference Ranges and Data
- Blood gas
- CO-oximetry / hemoximetry
- Spirometry
- standard
- upright / supine comparison
- Static lung volumes
- gas dilution
- body plethysmography
- DLCO
- Home testing (for example- spirometry- pulse oximetry)
- Oxygen assessment / titration at rest and / or exercise
- Exercise test
- field walking test (for example- 6MWT- shuttle walk test)
- monitored (for example- ECG- blood pressure- SpO2)
- Blood pressure monitoring
- ECG analysis (for example- arrhythmia- rate- pattern)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example- methacholine- exercise- EVH- mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example- MIP- MEP- cough peak flow)
- Safety data (for example- hand hygiene compliance- event management)
- Quality control procedures (for example- mechanical- biological)
- Serial pulmonary function testing (for example- trending a single patient)
- Clinical history and demographics (for example- age- race- sex- smoking history- medication- clinical indication)
- Laboratory quality management (for example- customer satisfaction- inventory control- standard operating procedures)

- Evaluate Reliability of Results
- Blood gas
- CO-oximetry / hemoximetry
- Spirometry
- standard
- upright / supine comparison
- Static lung volumes
- gas dilution
- body plethysmography
- DLCO
- Home testing (for example- spirometry- pulse oximetry)
- Oxygen assessment / titration at rest and / or exercise
- Exercise test
- field walking test (for example- 6MWT- shuttle walk test)
- monitored (for example- ECG- blood pressure- SpO2)
- Blood pressure monitoring
- ECG analysis (for example- arrhythmia- rate- pattern)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example- methacholine- exercise- EVH- mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example- MIP- MEP- cough peak flow)
- Safety data (for example- hand hygiene compliance- event management)
- Quality control procedures (for example- mechanical- biological)
- Serial pulmonary function testing (for example- trending a single patient)
- Clinical history and demographics (for example- age- race- sex- smoking history- medication- clinical indication)
- Laboratory quality management (for example- customer satisfaction- inventory control- standard operating procedures)

- Evaluate Clinical Implications
- Blood gas
- CO-oximetry / hemoximetry
- Spirometry
- standard
- upright / supine comparison
- Static lung volumes
- gas dilution
- body plethysmography
- DLCO
- Home testing (for example- spirometry- pulse oximetry)
- Oxygen assessment / titration at rest and / or exercise
- Exercise test
- field walking test (for example- 6MWT- shuttle walk test)
- monitored (for example- ECG- blood pressure- SpO2)
- Blood pressure monitoring
- ECG analysis (for example- arrhythmia- rate- pattern)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example- methacholine- exercise- EVH- mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example- MIP- MEP- cough peak flow)
- Safety data (for example- hand hygiene compliance- event management)
- Quality control procedures (for example- mechanical- biological)
- Serial pulmonary function testing (for example- trending a single patient)
- Clinical history and demographics (for example- age- race- sex- smoking history- medication- clinical indication)
- Laboratory quality management (for example- customer satisfaction- inventory control- standard operating procedures)

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RPFT
Registered Pulmonary Function Technologist - 2026
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Question: 925
A technologist sets up a nebulizer for a bronchodilator test with albuterol (2.5 mg/mL). To deliver 0.5
mg, the nebulizer runs at 0.2 mL/min. How long should it operate?
A. 1.2 seconds
B. 6.0 seconds
C. 4.8 seconds
D. 2.4 seconds
Answer: B
Explanation: Volume needed: 0.5 mg � 2.5 mg/mL = 0.2 mL. Nebulizer output: 0.2 mL/min = 0.003333
mL/s. Time = 0.2 mL � 0.003333 mL/s = 60 s � 10 = 6 s.
Question: 926
A 60-year-old patient undergoes body plethysmography. The technician records a panting maneuver with
a mouth pressure change of 1.5 cmH2O and a box volume change of 0.04 L. Using Boyle's law, calculate
the FRC (Patm = 1000 cmH2O, PH2O = 47 cmH2O).
A. 2.0 L
B. 3.0 L
C. 2.54 L
D. 3.5 L
Answer: C
Explanation: FRC = (?V / ?P) � (Patm - PH2O) = (0.04 / 1.5) � (1000 - 47) � 0.0267 � 953 � 2.54 L.
This calculation uses Boyle's law, accounting for the pressure-volume relationship during the closed-
shutter maneuver in body plethysmography. The result is consistent with typical FRC values in adults.
Question: 927
During a CPET, a 50-year-old female's ECG shows atrial fibrillation at 70% workload. SpO2 is 95%,
and blood pressure is 150/80 mmHg. What is the most appropriate action?
A. Continue and monitor ECG
B. Reduce workload by 15%
C. Stop the test immediately
D. Administer supplemental oxygen
Answer: C
Explanation: Atrial fibrillation during CPET is an absolute contraindication to continuing, as it indicates
cardiac instability. Stopping the test is necessary for safety. Continuing or reducing workload is unsafe,
and oxygen is not indicated for arrhythmia.
Question: 928
While performing a quality control check on a directional valve used in a spirometry circuit, the
technologist notices a 10% reduction in measured forced vital capacity (FVC) when using a 3-liter
calibration syringe. The valve's resistance is within specifications. What is the most likely cause of this
discrepancy?
A. Improper valve orientation causing backflow
B. Leak in the valve's diaphragm
C. Obstruction in the valve's inspiratory port
D. Sticking of the valve's one-way flap
Answer: A
Explanation: Improper valve orientation causing backflow is the most likely cause of a 10% reduction in
FVC during a calibration check. If the directional valve is incorrectly oriented, exhaled air may partially
re-enter the inspiratory pathway, reducing the measured volume. A leak in the diaphragm would cause
inconsistent volume loss, not a consistent 10% reduction. An obstruction in the inspiratory port would
primarily affect inspiratory volumes, not FVC. A sticking one-way flap would cause erratic
measurements, not a systematic reduction.
Question: 929
A PFT lab's inventory control system shows a 20% shortage of methacholine vials. What is the most
appropriate action?
A. Order additional methacholine
B. Continue testing with available stock
C. Switch to mannitol challenge tests
D. Suspend bronchial provocation testing
Answer: A
Explanation: A 20% shortage of methacholine vials risks disrupting bronchial provocation testing.
Ordering additional methacholine ensures continuity of testing. Switching to mannitol or suspending tests
is unnecessary if restocking is feasible.
Question: 930
During a bronchodilation study, a 60-year-old female with COPD has a pre-bronchodilator FEV1 of 1.2
L (50% predicted) and FVC of 2.4 L (70% predicted). Post-bronchodilator (400 �g albuterol), FEV1 is
1.4 L and FVC is 2.6 L. Is this a significant bronchodilator response per ATS/ERS criteria?
A. No, neither FEV1 nor FVC meets significance
B. Yes, both FEV1 and FVC meet significance
C. Yes, FEV1 meets significance but FVC does not
D. Yes, FVC meets significance but FEV1 does not
Answer: C
Explanation: ATS/ERS criteria define a significant bronchodilator response as an increase of =12% and
=200 mL in FEV1 or FVC from baseline. For FEV1: (1.4 - 1.2) / 1.2 = 16.7% (>12%) and 200 mL
(=200 mL), so FEV1 meets significance. For FVC: (2.6 - 2.4) / 2.4 = 8.3% (<12%), so FVC does not
meet significance.
Question: 931
A pulse oximeter during a CPET shows SpO2 of 99% despite the patient desaturating to 90% on a
previous test. The waveform is normal, and the sensor is clean. What is the most likely cause and
troubleshooting step?
A. Patient improvement; confirm with ABG
B. New sensor calibration; recalibrate the device
C. Methemoglobinemia; perform co-oximetry
D. Sensor site change; move to earlobe
Answer: C
Explanation: Methemoglobinemia can falsely elevate SpO2 readings, as methemoglobin absorbs light
similarly to oxyhemoglobin. Co-oximetry confirms methemoglobin levels. Recalibration or sensor site
changes are unnecessary with a normal waveform. Patient improvement is possible but requires ABG
confirmation.
Question: 932
A 65-year-old male's spirometry flow-volume loop shows a scooped expiratory curve. His FEV1 is 1.5 L
(60% predicted), and FVC is 3.0 L (80% predicted). What is the most likely diagnosis?
A. Asthma
B. Vocal cord dysfunction
C. Pulmonary fibrosis
D. Emphysema
Answer: D
Explanation: A scooped expiratory flow-volume loop with reduced FEV1 (60%) and normal FVC (80%)
suggests emphysema, characterized by airway collapse and obstruction. Asthma may show reversibility,
pulmonary fibrosis reduces FVC, and vocal cord dysfunction affects inspiratory curves.
Question: 933
During a CPET, a 55-year-old male reaches a VO2 max of 25 mL/kg/min. His ECG shows ST-segment
depression of 2 mm in leads V5�V6, and blood pressure is 200/110 mmHg. What is the most appropriate
action?
A. Continue testing to confirm VO2 max
B. Reduce workload and monitor ECG
C. Administer sublingual nitroglycerin
D. Stop the test immediately
Answer: D
Explanation: ST-segment depression of 2 mm and blood pressure of 200/110 mmHg are absolute
indications to stop CPET due to risk of myocardial ischemia and hypertensive crisis. Continuing or
reducing workload is unsafe, and administering nitroglycerin is beyond the technologist's scope without
physician direction.
Question: 934
During a CPET, the technologist notices the cycle ergometer's workload fluctuates between 95 and 105
watts at a set 100 watts. The pedaling rate is steady at 60 rpm. What is the most likely cause?
A. Inconsistent flywheel resistance
B. Malfunctioning torque sensor
C. Loose drive belt
D. Power supply instability
Answer: B
Explanation: A malfunctioning torque sensor is the most likely cause of workload fluctuations in a cycle
ergometer. The sensor measures applied force, and a malfunction causes inconsistent workload readings
despite steady pedaling. Inconsistent flywheel resistance would cause mechanical irregularities. A loose
drive belt would produce slippage, not precise fluctuations. Power supply instability affects the entire
system, not just workload.
Question: 935
A 70-year-old male's ECG during a 6MWT shows sinus rhythm at 100 bpm with frequent atrial
premature contractions (APCs) and a prolonged QTc of 480 ms. What is the most appropriate action?
A. Administer supplemental oxygen
B. Stop the test and refer to cardiology
C. Continue the test with ECG monitoring
D. Switch to a CPET for better monitoring
Answer: B
Explanation: Frequent APCs and a prolonged QTc (480 ms, normal <450 ms in males) during a 6MWT
suggest potential arrhythmia risk or underlying cardiac pathology, especially in a 70-year-old. Stopping
the test and referring to cardiology for further evaluation is the safest action. Oxygen is irrelevant to ECG
findings. Continuing the test risks worsening arrhythmias, and CPET is more strenuous and inappropriate
given the findings.
Question: 936
During routine quality control of a blood gas analyzer, a technologist runs a Level 2 control solution with
known values: pH = 7.400, PCO2 = 40.0 mmHg, PO2 = 100.0 mmHg. The results are: pH = 7.410, PCO2
= 41.2 mmHg, PO2 = 98.5 mmHg. The lab's acceptable ranges are pH �0.015, PCO2 �3 mmHg, PO2 �5
mmHg. What action should the technologist take?
A. Accept results; analyzer is within specifications
B. Recalibrate for PCO2; repeat control testing
C. Recalibrate for PO2; repeat control testing
D. Service the analyzer; all parameters are out of range
Answer: B
Explanation: Compare the results to the acceptable ranges. For pH: |7.410 � 7.400| = 0.010, within
�0.015. For PCO2: |41.2 � 40.0| = 1.2 mmHg, within �3 mmHg. For PO2: |98.5 � 100.0| = 1.5 mmHg,
within �5 mmHg. All parameters are within limits, but PCO2 is close to the upper limit (41.2 vs. 43
mmHg max). Per NBRC quality control standards, consistent drift toward the limit suggests potential
calibration drift. Recalibrating for PCO2 and repeating control testing ensures reliability before patient
testing.
Question: 937
During a CPET, the cycle ergometer's workload is set to 150 watts, but a dynamometer measures 135
watts at 60 rpm. The flywheel resistance is verified. What is the most likely cause?
A. Inaccurate torque calibration
B. Loose flywheel bolts
C. Misaligned drive chain
D. Worn brake pads
Answer: A
Explanation: Inaccurate torque calibration is the most likely cause of a cycle ergometer underdelivering
workload (135 watts instead of 150 watts). The torque sensor measures applied force, and miscalibration
reduces reported workload. Loose flywheel bolts or a misaligned drive chain would cause mechanical
irregularities. Worn brake pads would cause variable resistance, not a consistent 10% error.
Question: 938
A 62-year-old female with heart failure undergoes a shuttle walk test. Pre-test: SpO2 93%, HR 85 bpm,
BP 135/85 mmHg. Post-test: SpO2 85%, HR 120 bpm, BP 150/90 mmHg, distance 250 m (55%
predicted). What is the primary clinical implication?
A. Exercise-induced desaturation
B. Cardiac limitation
C. Normal exercise response
D. Ventilatory limitation
Answer: A
Explanation: SpO2 drop from 93% to 85% during the shuttle walk test indicates exercise-induced
desaturation, likely due to ventilation-perfusion mismatch in heart failure. HR and BP increases are
normal, not indicative of cardiac or ventilatory limitation alone. The reduced distance suggests limitation,
but desaturation is primary.
Question: 939
A technician performs an arterial blood gas (ABG) trial collection from a 55-year-old patient with
pulmonary fibrosis. The trial is collected from the radial artery, but the syringe is not immediately
placed on ice. The results show pH = 7.42, PaO2 = 65 mmHg, and PaCO2 = 38 mmHg. What is the
most likely impact of the delay in icing the sample?
A. Falsely elevated PaCO2
B. Falsely lowered PaO2
C. Falsely elevated PaO2
D. No significant impact
Answer: B
Explanation: Failure to immediately place an ABG trial on ice allows continued cellular metabolism,
which consumes oxygen and produces carbon dioxide. This typically results in a falsely lowered PaO2
and a potential increase in PaCO2. The PaO2 of 65 mmHg may be lower than the true value,
underestimating the patient's oxygenation status. The impact is significant in patients with already
compromised gas exchange, such as pulmonary fibrosis.
Question: 940
A 62-year-old patient with suspected COPD undergoes arterial blood gas (ABG) analysis. The results
show pH 7.36, PaCO2 48 mmHg, PaO2 72 mmHg, HCO3? 27 mEq/L, and SaO2 92%. The technologist
notices the trial was delayed in analysis by 30 minutes without ice preservation. How should the
reliability of these results be evaluated?
A. Accept results as valid; delay does not affect ABG parameters significantly
B. Recalibrate analyzer and repeat test to confirm values
C. Reject results; delayed analysis without ice likely caused inaccurate PaO2 and PaCO2
D. Verify with pulse oximetry to confirm SaO2 and accept other parameters
Answer: C
Explanation: Delayed analysis of an arterial blood gas trial without ice preservation can lead to
continued cellular metabolism, which consumes oxygen and produces carbon dioxide. This typically
results in a falsely decreased PaO2 and increased PaCO2. A 30-minute delay without cooling is
significant enough to question the reliability of these results, necessitating a repeat trial with proper
handling (iced and analyzed within 15 minutes). Verifying with pulse oximetry only addresses SaO2, not
PaO2 or PaCO2, and recalibration does not address trial handling errors.
Question: 941
A patient's static lung volumes via helium dilution show an FRC of 2.8 L, while plethysmography shows
3.5 L. The patient has COPD. What explains the discrepancy?
A. Inconsistent patient effort
B. Helium analyzer calibration error
C. Gas trapping in obstructive disease
D. Plethysmograph pressure drift
Answer: C
Explanation: In COPD, gas trapping causes helium dilution to underestimate FRC compared to
plethysmography, which captures all lung volumes, including trapped gas. Calibration errors or pressure
drift are less likely without specific evidence. Inconsistent effort would affect both methods similarly.
Question: 942
A 65-year-old patient with COPD undergoes a 6-minute walk test (6MWT) with pulse oximetry.
Baseline SpO2 is 94%, dropping to 87% at 4 minutes. What is the most appropriate action?
A. Stop the test and administer supplemental oxygen
B. Continue the test without intervention
C. Repeat the test with a higher baseline SpO2
D. Switch to a cardiopulmonary exercise test
Answer: A
Explanation: A SpO2 drop to 87% during the 6MWT indicates significant desaturation (ATS guideline
threshold: <88%). The test should be stopped, and supplemental oxygen administered to restore SpO2 to
=90%. Continuing the test risks hypoxia, repeating the test does not address the desaturation, and
switching to a CPET is inappropriate during an active test.
Question: 943
A quality control test on an isothermal lung analog yields a DLCO measurement of 22 mL/min/mm Hg,
while the expected value is 25 mL/min/mm Hg (�5%). The technologist confirms the gas mixture and
breath-hold time are correct. What should be done next?
A. Adjust the analyzer's CO sensor gain
B. Repeat the test with a longer breath-hold
C. Recalibrate the temperature sensor
D. Check for leaks in the gas delivery system
Answer: D
Explanation: A DLCO memorizing 12% below the expected value (outside �5%) suggests a system issue,
most likely a leak in the gas delivery system, which reduces the effective CO concentration. Adjusting
the CO sensor gain is premature without identifying a leak. Temperature sensor calibration affects gas
volume but has minimal impact on DLCO. A longer breath-hold is inappropriate as the standard 10-
second hold was used.
Question: 944
A 55-year-old patient's ABG results show pH = 7.30, PaO2 = 55 mmHg, PaCO2 = 50 mmHg, and
HCO3- = 24 mEq/L. What is the primary acid-base disorder?
A. Uncompensated respiratory acidosis
B. Compensated respiratory acidosis
C. Uncompensated metabolic acidosis
D. Compensated metabolic acidosis
Answer: A
Explanation: The low pH (7.30) and elevated PaCO2 (50 mmHg) indicate respiratory acidosis. The
HCO3- (24 mEq/L) is near normal, suggesting no significant renal compensation, making it
uncompensated. Metabolic acidosis would show a lower HCO3-, and compensated disorders would have
a normalized pH.
Question: 945
A patient with asthma performs home spirometry using a portable device. Results show FEV1 2.5 L
(70% predicted) with a coefficient of variation (CV) of 12%. The ATS/ERS guideline for acceptable
variability is <8%. What should the technologist recommend?
A. Accept results as home devices are less precise
B. Instruct patient to Improve technique and repeat testing
C. Switch to pulse oximetry for monitoring
D. Validate results with in-lab spirometry
Answer: B
Explanation: A CV >8% indicates unacceptable variability in home spirometry, suggesting inconsistent
technique or effort. The technologist should coach the patient on proper technique (e.g., forceful
exhalation, tight mouthpiece seal) and repeat testing. Home devices can achieve acceptable precision with
proper use. Pulse oximetry does not replace spirometry, and in-lab testing is a secondary step.
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Online Test Engine maintains performance records, performance graphs, explanations and references (if provided). Automated test preparation makes much easy to cover complete pool of MCQs in fastest way possible. RPFT Test Engine is updated on daily basis.

Exact copy of RPFT Practice Questions are here to download

Discover top-tier NBRC RPFT Exam Questions of premium practice questions for the Registered Pulmonary Function Technologist test preparation! At Killexams.com, we provide valid, up-to-date, and high-quality RPFT Exam Questions to ensure your success. Explore the details at https://killexams.com/pass4sure/exam-detail/RPFT. Our expertly curated database of RPFT Exam Questions, derived from real exams, empowers you to master the content and ace the RPFT test on your first try. Simply study our Questions and Answers, leverage our online or desktop test engine, and co

Latest 2026 Updated RPFT Real test Questions

Killexams.com has implemented significant enhancements and innovations to their RPFT TestPrep in 2026, with all updates seamlessly integrated into our free questions. The 2026 refreshed RPFT practice test is meticulously crafted to ensure your triumph in the actual exam. We strongly advise reviewing the complete dumps questions at least once prior to the real test. Engaging with our RPFT practice questions not only ensures you pass the test but also substantially elevates your expertise. You will be equipped to excel as a professional in a genuine organizational setting. Our focus is on enriching candidates’ understanding of RPFT courses and objectives, prioritizing knowledge advancement over merely passing the test with our Practice Test. This approach empowers individuals to achieve lasting success in their careers. If you are seeking the most current and comprehensive TestPrep to ace the NBRC RPFT test and secure a high-paying position, killexams.com stands as the premier choice. A dedicated team of experts diligently compiles authentic RPFT test questions for killexams.com. You will gain access to Registered Pulmonary Function Technologist test questions designed to ensure your success in the RPFT exam. get the latest RPFT test questions with each update, backed by a 100% money-back guarantee. While numerous providers offer RPFT free questions, finding valid and current 2026 RPFT exam questions is a critical challenge. Exercise caution before trusting free practice questions available online.

Killexams Review | Reputation | Testimonials | Customer Feedback

I had delayed taking the RPFT test due to my busy schedule at work. But after discovering the Q&A provided by Killexams.com, I felt motivated to take on the test. The material was supportive and helped me resolve my doubts about the RPFT topic. I was extremely happy to pass the test with an excellent score of 97%. Thank you, Killexams, for your incredible support.
Shahid nazir [2026-5-16]

I am grateful to Killexams.com for helping me score 96% on the RPFT exam. Their test bank provided a realistic test experience, with clear explanations for every question.
Martin Hoax [2026-4-24]

As my responsibilities grew, preparing for the RPFT test was tough, but killexams.com bundle delivered. Their accurate Q&A helped me pass with a strong score, and the knowledge gained has advanced my career. I highly recommend their resources.
Lee [2026-5-11]

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Frequently Asked Questions about Killexams Practice Tests

Where I can find RPFT test objectives?
Complete RPFT test objectives information is provided at killexams.com at RPFT test page. RPFT Syllabus, RPFT Course Contents, RPFT test Objective, and other test information are provided on the RPFT test page. It will greatly help you to go through complete course contents and register at killexams to get the full version of RPFT practice questions.

Will I be able to find updated RPFT practice questions Questions & Answers?
Yes, once registered at killexams.com you will be able to get up-to-date RPFT practice questions Q&A that will help you pass the test with good marks. When you get and practice the test questions, you will be confident and feel improvement in your knowledge.

The same RPFT questions in the actual test, Is it possible?
Yes, It is possible and it is happening in the case of these RPFT test questions. They are taken from actual test sources, that\'s why these RPFT test questions are sufficient to read and pass the exam. Although you can use other sources also for improvement of knowledge like textbooks and other aid material these RPFT practice questions are sufficient to pass the exam.

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Certainly, Killexams is totally legit and fully trustworthy. There are several features that makes killexams.com real and straight. It provides knowledgeable and completely valid test dumps that contain real exams questions and answers. Price is minimal as compared to the vast majority of services online. The Q&A are current on normal basis along with most latest brain dumps. Killexams account launched and product or service delivery is extremely fast. Data downloading is usually unlimited and really fast. Aid is available via Livechat and Netmail. These are the characteristics that makes killexams.com a robust website that supply test dumps with real exams questions.

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Which is the best testprep site of 2026?

Prepare smarter and pass your exams on the first attempt with Killexams.com – the trusted source for authentic test questions and answers. We provide updated and Verified practice test questions, study guides, and PDF test dumps that match the actual test format. Unlike many other websites that resell outdated material, Killexams.com ensures daily updates and accurate content written and reviewed by certified experts.

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Registered Pulmonary Function Technologist Practice Test

RPFT test Format | Course Contents | Course Outline | test Syllabus | test Objectives

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RPFT trial MCQs

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Exact copy of RPFT Practice Questions are here to download

Latest 2026 Updated RPFT Real test Questions

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