spark test

From spark +‎ test, due to the production of sparks in order to test for the character of a steel.

spark test (plural spark tests)

1. An instance of spark testing.

spark test (third-person singular simple present spark tests, present participle spark testing, simple past and past participle spark tested)

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

• spark testing (noun)