plural of sparking plug

plural of vital spark

plural of spark spread

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.

(UK) Completely asleep or unconscious.

(transitive, colloquial) To render unconscious; to knock out.