Engineering Dictionary By: aplabon Subject Name: Dictionary File Type: pdf File Size: 691.636 KB ABMA - American Boiler Manufacturers Association. ABRASION - The wearing away of a surface by rubbing, as with sandpaper on wood. ABRASION RESISTANCE - The ability of a material to resist surface wear. ABRASIVE EROSION - Erosive wear caused by the relative motion of solid particles which are entrained in a fluid, moving nearly parallel to a solid surface. ABSOLUTE HUMIDITY - Amount of moisture in the air, indicated in kg/kg of dry air. ABSOLUTE PRESSURE - Total pressure measured from an absolute vacuum. It equals the sum of the gauge pressure and the atmospheric pressure corresponding to the barometer. ABSOLUTE PRESSURE - Air at standard conditions (70°F air at sea level with a barometric pressure of 29.92 in Hg) exerts a pressure of 14.696 psi. This is the pressure in a system when the pressure gauge reads zero. So the absolute pressure of a system is the gauge pressure in pounds per square inch added to the atmospheric pressure of 14.696 psi (use 14.7 psi in environmental system work) and the symbol is "psia".
Posted on: Sat, 22 Jun 2013 11:00:00 +0000
Trending Topics
Recently Viewed Topics
© 2015