<prompt> Maximum voluntary ventilation is measured for?30 sec.60 sec.75 sec.120 sec.99.  <response>: Ans. isbi.e., 60 sec.Ref: Guyton 12he p. 470Maximum voluntary ventilation MW :It is the maximum amount of air that can be moved into and out of lungs in 1 minute by voluntary effo.It is about 125-170 Lmin. 