What is the volume displacement when the pen of a 13.5-L ...

[vicotolentino]

What is the volume displacement when the pen of a 13.5-L water-sealed spirometer moves 28 mm?
 
  a. 0.378 L c. 0.586 L
  b. 0.563 L d. 1.168 L

Question 2

What is the tidal volume measurement when the pen of a 9-L water-sealed spirometer moves 25 mm?
 
  a. 0.338 L c. 0.843 L
  b. 0.523 L d. 1.043 L

[owenfalvey]

Answer to Question 1

ANS: D
The bell factor for a 13.5-L water-sealed spirometer is 41.73 mL/mm. Therefore, 41.73 mL/1 mm = X mL/28 mm; X = 1168 mL, or 1.168 L.

Answer to Question 2

ANS: B
The bell factor for a 9-L water-sealed spirometer is 20.93 mL/mm. Therefore, 20.93 mL/1 mm = X mL/25 mm; X = 523 mL, or 0.523 L.