1
PFT PRACTICE EXAM 2026/2027 |
PULMONARY FUNCTION | 80 VERIFIED
Q&A | DETAILED RATIONALES | PASS
GUARANTEED – A+ GRADED
SECTION 1: SPIROMETRY FUNDAMENTALS – Questions 1-10
Q1: Spirometry Purpose
A respiratory therapist is preparing to perform spirometry on a 50-year-old patient. What is the
primary purpose of this test?
A. Diagnose pneumonia
B. Measure lung volumes and capacities
C. Assess cardiac output
D. Evaluate sleep patterns
Correct Answer: B
Rationale: Spirometry measures lung volumes and capacities, specifically FVC, FEV1, and FEV1/FVC
ratio. Pneumonia (A) is diagnosed by chest X-ray. Cardiac output (C) is assessed by
echocardiography. Sleep patterns (D) are evaluated by polysomnography. [100% CORRECT]
Q2: Spirometry Contraindications
Which of the following is a relative contraindication for spirometry?
A. Recent myocardial infarction within 1 month
B. History of asthma
C. Current smoking
D. Obesity
Correct Answer: A
Rationale: Recent myocardial infarction within 1 month is a relative contraindication for spirometry.
History of asthma (B) is not a contraindication. Current smoking (C) is not a contraindication. Obesity
(D) is not a contraindication. [100% CORRECT]
Q3: Spirometry Technique
During spirometry, the patient is instructed to inhale maximally and then exhale as forcefully and
completely as possible. What is this maneuver called?
,2
A. Tidal volume
B. Forced vital capacity
C. Residual volume
D. Functional residual capacity
Correct Answer: B
Rationale: The forced vital capacity (FVC) maneuver involves a maximal inhalation followed by a
forceful and complete exhalation. Tidal volume (A) is the volume of air inhaled or exhaled during
normal breathing. Residual volume (C) is the volume of air remaining in the lungs after maximal
exhalation. Functional residual capacity (D) is the volume of air remaining in the lungs after normal
exhalation. [100% CORRECT]
Q4: FEV1 Interpretation
A patient's FEV1 is 75% of predicted. How should this be interpreted?
A. Normal
B. Mild obstruction
C. Moderate obstruction
D. Severe obstruction
Correct Answer: B
Rationale: An FEV1 of 75% of predicted indicates mild obstruction. Normal (A) is greater than 80% of
predicted. Moderate obstruction (C) is 50-69% of predicted. Severe obstruction (D) is less than 50%
of predicted. [100% CORRECT]
Q5: FEV1/FVC Ratio
A patient's FEV1/FVC ratio is 75%. How should this be interpreted?
A. Normal
B. Obstructive pattern
C. Restrictive pattern
D. Mixed pattern
Correct Answer: A
Rationale: An FEV1/FVC ratio greater than 70% is considered normal. Obstructive pattern (B) would
be less than 70%. Restrictive pattern (C) would have a normal or increased ratio with decreased FVC.
Mixed pattern (D) would have features of both. [100% CORRECT]
Q6: Bronchodilator Response
A patient undergoes spirometry before and after bronchodilator administration. The FEV1 improves
by 10% and 150 mL. How should this be interpreted?
A. Significant bronchodilator response
B. No significant bronchodilator response
, 3
C. Restrictive pattern
D. Normal
Correct Answer: B
Rationale: A significant bronchodilator response is defined as an improvement in FEV1 of at least
12% and 200 mL. A 10% and 150 mL improvement is not significant. Significant bronchodilator
response (A) would be ≥12% and 200 mL. Restrictive pattern (C) is not assessed by bronchodilator
response. Normal (D) is incorrect. [100% CORRECT]
Q7: Spirometry Acceptability
Which of the following indicates an acceptable spirometry effort?
A. Cough during the first second
B. Good start with rapid rise to peak flow
C. Early termination of exhalation
D. Variable effort
Correct Answer: B
Rationale: A good start with rapid rise to peak flow indicates an acceptable spirometry effort. Cough
during the first second (A) is unacceptable. Early termination (C) is unacceptable. Variable effort (D)
is unacceptable. [100% CORRECT]
Q8: Spirometry Repeatability
How many acceptable spirometry efforts are required for a valid test?
A. 1
B. 2
C. 3
D. 5
Correct Answer: C
Rationale: At least 3 acceptable spirometry efforts are required for a valid test, with the two largest
FVC and FEV1 values within 150 mL of each other. 1 (A) and 2 (B) are insufficient. 5 (D) is not
required but may be performed. [100% CORRECT]
Q9: Spirometry Interpretation Algorithm
A patient has an FEV1/FVC ratio of 80% and an FVC of 55% of predicted. How should this be
interpreted?
A. Normal
B. Obstructive pattern
C. Restrictive pattern
D. Mixed pattern
PFT PRACTICE EXAM 2026/2027 |
PULMONARY FUNCTION | 80 VERIFIED
Q&A | DETAILED RATIONALES | PASS
GUARANTEED – A+ GRADED
SECTION 1: SPIROMETRY FUNDAMENTALS – Questions 1-10
Q1: Spirometry Purpose
A respiratory therapist is preparing to perform spirometry on a 50-year-old patient. What is the
primary purpose of this test?
A. Diagnose pneumonia
B. Measure lung volumes and capacities
C. Assess cardiac output
D. Evaluate sleep patterns
Correct Answer: B
Rationale: Spirometry measures lung volumes and capacities, specifically FVC, FEV1, and FEV1/FVC
ratio. Pneumonia (A) is diagnosed by chest X-ray. Cardiac output (C) is assessed by
echocardiography. Sleep patterns (D) are evaluated by polysomnography. [100% CORRECT]
Q2: Spirometry Contraindications
Which of the following is a relative contraindication for spirometry?
A. Recent myocardial infarction within 1 month
B. History of asthma
C. Current smoking
D. Obesity
Correct Answer: A
Rationale: Recent myocardial infarction within 1 month is a relative contraindication for spirometry.
History of asthma (B) is not a contraindication. Current smoking (C) is not a contraindication. Obesity
(D) is not a contraindication. [100% CORRECT]
Q3: Spirometry Technique
During spirometry, the patient is instructed to inhale maximally and then exhale as forcefully and
completely as possible. What is this maneuver called?
,2
A. Tidal volume
B. Forced vital capacity
C. Residual volume
D. Functional residual capacity
Correct Answer: B
Rationale: The forced vital capacity (FVC) maneuver involves a maximal inhalation followed by a
forceful and complete exhalation. Tidal volume (A) is the volume of air inhaled or exhaled during
normal breathing. Residual volume (C) is the volume of air remaining in the lungs after maximal
exhalation. Functional residual capacity (D) is the volume of air remaining in the lungs after normal
exhalation. [100% CORRECT]
Q4: FEV1 Interpretation
A patient's FEV1 is 75% of predicted. How should this be interpreted?
A. Normal
B. Mild obstruction
C. Moderate obstruction
D. Severe obstruction
Correct Answer: B
Rationale: An FEV1 of 75% of predicted indicates mild obstruction. Normal (A) is greater than 80% of
predicted. Moderate obstruction (C) is 50-69% of predicted. Severe obstruction (D) is less than 50%
of predicted. [100% CORRECT]
Q5: FEV1/FVC Ratio
A patient's FEV1/FVC ratio is 75%. How should this be interpreted?
A. Normal
B. Obstructive pattern
C. Restrictive pattern
D. Mixed pattern
Correct Answer: A
Rationale: An FEV1/FVC ratio greater than 70% is considered normal. Obstructive pattern (B) would
be less than 70%. Restrictive pattern (C) would have a normal or increased ratio with decreased FVC.
Mixed pattern (D) would have features of both. [100% CORRECT]
Q6: Bronchodilator Response
A patient undergoes spirometry before and after bronchodilator administration. The FEV1 improves
by 10% and 150 mL. How should this be interpreted?
A. Significant bronchodilator response
B. No significant bronchodilator response
, 3
C. Restrictive pattern
D. Normal
Correct Answer: B
Rationale: A significant bronchodilator response is defined as an improvement in FEV1 of at least
12% and 200 mL. A 10% and 150 mL improvement is not significant. Significant bronchodilator
response (A) would be ≥12% and 200 mL. Restrictive pattern (C) is not assessed by bronchodilator
response. Normal (D) is incorrect. [100% CORRECT]
Q7: Spirometry Acceptability
Which of the following indicates an acceptable spirometry effort?
A. Cough during the first second
B. Good start with rapid rise to peak flow
C. Early termination of exhalation
D. Variable effort
Correct Answer: B
Rationale: A good start with rapid rise to peak flow indicates an acceptable spirometry effort. Cough
during the first second (A) is unacceptable. Early termination (C) is unacceptable. Variable effort (D)
is unacceptable. [100% CORRECT]
Q8: Spirometry Repeatability
How many acceptable spirometry efforts are required for a valid test?
A. 1
B. 2
C. 3
D. 5
Correct Answer: C
Rationale: At least 3 acceptable spirometry efforts are required for a valid test, with the two largest
FVC and FEV1 values within 150 mL of each other. 1 (A) and 2 (B) are insufficient. 5 (D) is not
required but may be performed. [100% CORRECT]
Q9: Spirometry Interpretation Algorithm
A patient has an FEV1/FVC ratio of 80% and an FVC of 55% of predicted. How should this be
interpreted?
A. Normal
B. Obstructive pattern
C. Restrictive pattern
D. Mixed pattern
