The maximum percentage of defects that has been determined tolerable as a process average for a sampling plan during inspection or test of a product with respect to economic and functional requirements of the item. Abbreviated AQL.
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TRY VALVESTest valves on a water column used to verify the water level when the gauge glass is out of service. |
POPOV'S STABILITY CRITERION
A frequency domain stability test for systems consisting of a linear component described by a transfer function preceded by a nonlinear component characterized by an input-output function), with a unity gain feedback loop surrounding the series connection.
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PLUG GAGE
A steel gage that is used to test the dimension of a hole; may be straight or tapered, plain or threaded, and of any crosssectional shape.
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PILOT-SCALE CHEMICAL REACTION
Small-scale chemical reaction used to test operating conditions and product yields; used as a pilot for design of large-scale reaction systems.
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PERMAFROST DRILLING
Boreholes drilled in 397 permeameter permeate in a test specimen of ferromagnetic material by a given magnetic intensity, to permit computation of the magnetic permeability of the material.
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PERMANENT SET
Permanent plastic deformation of a structure or a test piece after removal of the applied load. Also known as set.
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PENETRATION SPEED
The speed at which a drill can cut through rock or other material. penetration test
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PENETRATION DEPTH
1. In induction heating, the thickness of a layer, extending inward from a conductor's surface, whose resistance to direct current equals the resistance of the whole conductor to alternating current of a given frequency. 2. The greatest depth in an ultrasonic test piece at which indications can be measured.
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PEG COUNT METER
A meter or register that counts the number of trunks tested, the number of circuits passed busy, the number of test failures, or the number of repeat tests completed.
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PEEL TEST
A test to ascertain the adhesive strength of bonded strips of metals by peeling or pulling the metal strips back and recording the adherence values.
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