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paper bag tests
plural of paper bag test
device under test
A manufactured product undergoing testing, either at first manufacture or later during its life cycle as part of ongoing functional testing and calibration checks, which can also include a test after reparation to establish that the product is performing in accordance with the original product specification.
Tan Delta test
A test to measure the degree of deterioration of an electrical insulation which is performed at two temperature by applying AC voltage to the test object and measure the total current flow through it, and separating and comparing the reactive and resistance portions of the current passing through it.
borax bead test
(inorganic chemistry) in qualitative inorganic analysis, a test for the presence of certain metallic elements by observing the colours given to a bead of borax in a loop of platinum wire held in the oxidizing and reducing parts of a Bunsen burner flame
Charpy impact test
A test of the impact strength of a material, used to determine its relative ductility or brittleness. The test is executed by swinging a large, heavy hammer on a pendulum from a predetermined height. The hammer fractures the material sample, usually a block of a certain size with a notch cut in it. The height to which the pendulum swings is used to calculate the energy necessary to fracture the sample.
stand the test of time
(idiomatic) To remain useful or valued over a long period of time; to last a long time.
（ present singular third-person ）
（ participle present ）
（ participle past ）
（ past ）
liver function test
(medicine) any of several biochemical blood assays designed to give information on the state of a patient's liver; include total protein, albumin, alanine transaminase, alkaline phosphatase and bilirubin
double-blind test
(sciences) A form of scientific testing in which some information is withheld from two different parties. Most commonly, neither the tester nor the subjects tested know which are the control items and which are the test items.
test tube baby
A baby who was conceived by in vitro fertilisation and then implanted in the uterus of the mother.
test-retest method
(statistics) A technique used to estimate the reliability or consistency of some measurement by correlating the results of multiple measurements, spread over time.
