bubble test

bubble test

[′bəb·əl ‚test]
(engineering)
Measurement of the largest opening in the mesh of a filter screen; determined by the pressure needed to force air or gas through the screen while it is submerged in a liquid.
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NBC NCOs, do the bubble test for all your unit's masks.
Combining tension, inflation, and torsion in a single test provides the comprehensive representation of material behavior, but a good test to approximate the functionality of the hypertensive pulmonary artery is the bubble test.
The inner chamber is subjected to a 225 psig hydrostatic pressure test and a 150 psig helium bubble test, while the outer chamber is subjected to a 150 psig helium bubble test.
The inner chamber is subjected to a 225 psig hydrostatic pressure test and a 150 psig helium bubble test while the outer chamber is subjected to a 150 psig helium bubble test.
One instrument works on the initial bubble test (IBT) method, in which a small sample of liquid aluminum is poured into a pressure-tight chamber.
Schools, universities and HR departments are very frustrated at having to constantly purchase copyrighted bubble test sheets from the test grader scanner manufacturer at high prices," said Rich Hedderich, VP of ZIP-scan.
The basic visual bubble test involves placing a molten aluminum alloy sample in a bell jar, pulling a specified vacuum and observing any surface bubbling or blistering occurring as the sample solidifies.
com is releasing a revolutionary software program called PrintScanScore(TM) which does not require the purchase of proprietary bubble test sheets.
If the test is to be used as an initial bubble test, then generally it is the higher vacuums (2 mm Hg) that are the most desirable.
Another viable technique for measuring the level of hydrogen gas in molten aluminum, according to Acklin and Davidson, is the initial bubble test.
Additionally, the sensitivity of the Helitest is three orders of magnitude better than the conventional bubble test method.