CPFT Certified Pulmonary Function
Technologist Exam
Question 1. Which of the following is the primary purpose of calibrating
a spirometer before patient use?
A) Reduce test time
B) Ensure accuracy of measurements
C) Decrease patient variability
D) Improve infection control
Answer: B
Explanation: Calibration ensures that the spirometer provides accurate
and reliable measurements, which is essential for valid pulmonary
function test results.
Question 2. What is the most common method for disinfecting reusable
mouthpieces after use in pulmonary function testing?
A) Wiping with alcohol
B) Autoclaving
C) Soaking in a high-level disinfectant
D) Air drying
Answer: C
