All of the Following Statements Are Important ATS Instrument Specifications

Multiple Choice

All of the following statements are important ATS instrument specifications except:

A) Back pressure and resistance must be less than 1.5 cm H₂O/L/sec up to an air flow of 14 L/sec.
B) Spirometer must be capable of measuring volumes of at least 8 L (BTPS) with flows between zero and 14 L/sec.
C) The paper must move at a chart speed of at least 32 mm/sec.
D) Spirometer must be capable of measuring expired volumes for at least 15 seconds.