Engine 2014: General Subjects

1. A when flushing the pressure tank with firemain water
2. B by a pressure relief valve when the pressure exceeds the preset level, usually 42 psig (2.98 kg/cm2)
3. C at all times, except when the tank is pressurized for discharging or aerating the bulk material
4. D when filling the tank or to insure that the tank is not pressurized prior to entering for cleaning and inspection

Tip: press A-D to answer