What should the air pressure gauge reading be in a typical air brake system during normal operation?
a.Between 50 and 75 PSI
b.Between 100 and 125 PSI
c.Between 130 and 150 PSI
d.Between 60 and 80 PSI
Explanation
During normal operation, the air pressure in the system should be maintained between approximately 100 and 125 PSI. The governor cuts in at about 100 PSI to build pressure and cuts out at about 125 PSI.