NDT TEST 1 EXAM 2023 WITH 100% CORRECT ANSWERS

What are two advantages of non-destructive testing The material tested are not damaged or Destroyed and Most of the equipment available is very portable What is liquid Penetrant testing? is an NDT method used for location surface discontinuities in a non-porous object What principle enables PT to work? Capillary force or action, this force causes the liquid to creep and crawl into fine openings All penetrants are? Oil-Based, oils are used due to their low surface tensions The Forerunner of modern penetrant techniques was known as? Oil whiting method What is the definition of surface tension? Us the property of the atoms that bind the surface of a liquid, resembling an elastic skin under tention A discontinuity can be defined as Change, Break or Interruption Type 1 Fluorescent Dye Type 2 Visible dye Type 3 Dual Mode dye (Fluoresent/visible) Phosphorescence glows till light source is removed then dissipates Black light have 2 important fuctrions what are they Removing the short wave ultraviolet lights and removing most of the white light that the lamp produces what is eyeball florescence? It is the fluorescing of the liquid of the eye and results in momentary blurred vision and, of course, a short period of time when it would be impossible to continue with the inspection what should be the minimum intensity of black light? 1000 Micro-watt per cm squared