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NDT TEST 1 Questions and Answers 2024/2025 $12.49   Add to cart

Exam (elaborations)

NDT TEST 1 Questions and Answers 2024/2025

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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 e...

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  • October 11, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NDT
  • NDT
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2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!


NDT TEST 1 Questions and Answers
2024/2025
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




1|Page| GradeA+ | 2 0 0 2 5

, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

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


what are some safety features built in the black light?

 If the voltage fluctuates from 90-120 volts , the bulb will shut itself off



1|Page| GradeA+ | 2 0 0 2 5

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