ASNT Level II Study Guide Questions With Correct
Answers.
In a normal, healthy eye, the incoming light is focused on the
retina
The component of the eye that responds to light intensity and gives the eye its
color is the
iris
If the focal point of the light entering the eye falls in front of the retina, the result
is
myopia (neat-sightedness)
During direct visual inspection, viewing distance shall not be any more than
24 in or 610 mm
Which of the following are visual examination methods
direct and indirect
Visible light is one of the radiation types graphically represented on the
electromagnetic spectrum
To successfully locate anomalies the inspector must
use sufficient lighting
Visible light perceived by the eye is in the wavelength range of
380-770 nanometers
Visible light travels in a straight line until it is
reflected, refracted, or diffracted
A photometer used by inspectors
converts radiant energy of light into measurable electrical signal
A lumen is defined as
equal to 1 fc falling on 1 ft2 of area
Luminous intensity
is inversely proportional to the square of the distance from the source
What provides more visible light per unit of electric power consumed
High-intensity discharge lights
When examining objects of substantial size
a scanning plan should be formed and followed
When is the surface condition of a part an important factor during visual testing
Poor surface condition could mask discontinuities
How can glare be reduced during inspection of a part
Dimming the light source
Environmental factors that affect visual inspection includes
atmosphere and cleanliness
To improve the detection of visual discontinuities on colored objects
select the optimal color of lighting to enhance desired characteristics
Battery drain, coated chips, and high light intensities are all considerations when
using
LED sources
When inspecting a reflective surface, glare from the surface
Answers.
In a normal, healthy eye, the incoming light is focused on the
retina
The component of the eye that responds to light intensity and gives the eye its
color is the
iris
If the focal point of the light entering the eye falls in front of the retina, the result
is
myopia (neat-sightedness)
During direct visual inspection, viewing distance shall not be any more than
24 in or 610 mm
Which of the following are visual examination methods
direct and indirect
Visible light is one of the radiation types graphically represented on the
electromagnetic spectrum
To successfully locate anomalies the inspector must
use sufficient lighting
Visible light perceived by the eye is in the wavelength range of
380-770 nanometers
Visible light travels in a straight line until it is
reflected, refracted, or diffracted
A photometer used by inspectors
converts radiant energy of light into measurable electrical signal
A lumen is defined as
equal to 1 fc falling on 1 ft2 of area
Luminous intensity
is inversely proportional to the square of the distance from the source
What provides more visible light per unit of electric power consumed
High-intensity discharge lights
When examining objects of substantial size
a scanning plan should be formed and followed
When is the surface condition of a part an important factor during visual testing
Poor surface condition could mask discontinuities
How can glare be reduced during inspection of a part
Dimming the light source
Environmental factors that affect visual inspection includes
atmosphere and cleanliness
To improve the detection of visual discontinuities on colored objects
select the optimal color of lighting to enhance desired characteristics
Battery drain, coated chips, and high light intensities are all considerations when
using
LED sources
When inspecting a reflective surface, glare from the surface
