past tense of spark test

present of spark test

plural of spark test

(metalworking) To test for the general character of a steel, when testing a piece of steel, by grinding it, producing sparks, using color of sparks to determine its general classification.

An instance of spark testing.

plural of test of time / Alternative form of test of time

plural of Mullen test

A test for determining the hardness of water by shaking it up with liquid soap (not detergent).

plural of soap test

(occupational health and safety) Test of the integrity of the electrical insulation of an appliance or other electrical equipment, by measurement of resistance when a high voltage is applied.