NDT Quizzes 1–4 Study Guide & Comprehensive Non-Destructive Testing
Revision Questions
ASNT formally recognized visual testing (VT) as an NDT method - correct answer ✔✔at the ANT
Fall Conference 1988
Visual testing is unique in that it is - correct answer ✔✔the only method that reveals indications
of discontinuities directly
One of the first aids used in visual testing was developed for another industry and was called an
- correct answer ✔✔endoscope
One of the advantages of visual testing is it can be used - correct answer ✔✔any time during
the manufacture or life of the product
Often visual testing is performed in two steps: - correct answer ✔✔an initial inspection at lower
light levels and without magnification, and a second inspection evaluating anomalies located
using higher light levels magnification
Contrast may be increased by - correct answer ✔✔increasing differences in reflectivity, color,
differences, or discoloration
Surface discontinues that are located with visual testing include - correct answer ✔✔cracks and
voids in all materials
A limitation of visual testing is the - correct answer ✔✔need for discontinuities to be surface
breaking
, Visual testing differes from other NDT methods in that - correct answer ✔✔the discontinuities
are visible to the eye
Visual testing might be called the ___________________ of all NDT - correct answer
✔✔foundation
The difference between different forms of electromagnetic radiation is their - correct answer
✔✔wavelength
Visible light is defined as electromagnetic radiation observed by the human eye and is in the
range of - correct answer ✔✔400 to 700 nanometers
***The "candela" is an SI unit that measures - correct answer ✔✔the intensity of a light source
As light moves from the source, intensity is reduced because - correct answer ✔✔Light
becomes more diffused as it moves away from the light source
As light strikes a rough of faceted surface, it is: - correct answer ✔✔reflected in a number of
directions
Light incident on a material - correct answer ✔✔may be absorbed, reflected, or transmitted
depending on the material
***A luminance difference from a crack in a sound area will produce what is known as: - correct
answer ✔✔contrast
When viewing materials, the reflection from small discontinuities can be located more easily
and with less eye fatigue - correct answer ✔✔if the light intensity is reduced
Revision Questions
ASNT formally recognized visual testing (VT) as an NDT method - correct answer ✔✔at the ANT
Fall Conference 1988
Visual testing is unique in that it is - correct answer ✔✔the only method that reveals indications
of discontinuities directly
One of the first aids used in visual testing was developed for another industry and was called an
- correct answer ✔✔endoscope
One of the advantages of visual testing is it can be used - correct answer ✔✔any time during
the manufacture or life of the product
Often visual testing is performed in two steps: - correct answer ✔✔an initial inspection at lower
light levels and without magnification, and a second inspection evaluating anomalies located
using higher light levels magnification
Contrast may be increased by - correct answer ✔✔increasing differences in reflectivity, color,
differences, or discoloration
Surface discontinues that are located with visual testing include - correct answer ✔✔cracks and
voids in all materials
A limitation of visual testing is the - correct answer ✔✔need for discontinuities to be surface
breaking
, Visual testing differes from other NDT methods in that - correct answer ✔✔the discontinuities
are visible to the eye
Visual testing might be called the ___________________ of all NDT - correct answer
✔✔foundation
The difference between different forms of electromagnetic radiation is their - correct answer
✔✔wavelength
Visible light is defined as electromagnetic radiation observed by the human eye and is in the
range of - correct answer ✔✔400 to 700 nanometers
***The "candela" is an SI unit that measures - correct answer ✔✔the intensity of a light source
As light moves from the source, intensity is reduced because - correct answer ✔✔Light
becomes more diffused as it moves away from the light source
As light strikes a rough of faceted surface, it is: - correct answer ✔✔reflected in a number of
directions
Light incident on a material - correct answer ✔✔may be absorbed, reflected, or transmitted
depending on the material
***A luminance difference from a crack in a sound area will produce what is known as: - correct
answer ✔✔contrast
When viewing materials, the reflection from small discontinuities can be located more easily
and with less eye fatigue - correct answer ✔✔if the light intensity is reduced
