As the opening in the shaft at the fire floor increases, the capacity of the air handling units used to pressurize
the floors must increase in order to resist the increased load of smoke carried in the shaft.
Be sure the outboard line is shut off and turn the water on to pressurize
The agency intended to pressurize
the propulsion system five days into the flight rather than wait until the craft reached Mars 11 months later, when its thrusters had to be fired.
A better corrective action is to back the pressure pour away from the pour line, pressurize
to fill the pour launder, hold the iron for a given period of time to heat the pour launder refractory and reduce surface oxides before dispensing a given amount of metal into a ladle.
In essence, the system takes domestic or industrial wastewater, cooks it, pressurizes
it, and exposes it to liquid oxygen.
The PEP process pressurizes
the mold and then opens a valve to allow expulsion of melt into an overflow cavity (PT, June 'O2,p.
In bubble testing, the operator pressurizes
the part, submerges it in a water bath, and then watches for a stream of escaping bubbles that signal a leak.
In bubble testing, an operator pressurizes
a casting, forcing in air and sealing the opening.