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NO.1 When selecting gas tanks for a DLcosimulator, which of the following expired CO gas
concentrations will produce the highest simulated DLco?
A. 0.15
B. 0.30
C. 0.10
D. 0.08
Answer: B
NO.2 While assessing a patient’s expired gases at rest prior to exercise, a pulmonary function
technologist calculates the RER as 0.6. Which of the following is the most likely explanation?
A. The patient is hyperventilating
B. The expired gas is contaminated with air
C. The patient has an elevated VDAVT
D. A gas analyzer is malfunctioning
Answer: D
NO.3 There is a leak in the tubing or mouthpiece.
A. 1,2, and 4 only
B. 2,3, and 4 only
C. 1,2, and 3 only
D. 1,3, and 4 only
E. 4.
Which of the above patterns illustrates the effect of increasing temperature in the plethysmograph
during airways resistance measurement?
A. 4
B. 3
C. 2
D. 1
Answer: D
NO.4 While performing duplicate blood gas analyses, a pulmonary function technologist notes that
the second instrument gives consistently higher values forPaCO2and PaO2. Which of
the following is the most probable cause of higher readings from the second instrument?
A. The sample chamber temperature is greater than 37 C
B. An excessive delay occurredbetween running the two samples
C. The PO2and PCO2electrodemembranes have protein build-up
D. The sample chamber has a bacterial contaminate
Answer: A
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