ASNT VT LEVEL II COMPREHENSIVE STUDY
GUIDE 2026 COMPLETE SOLUTIONS VERIFIED
◉ Spectroradiometer. Answer: Uses a monochromator, measures
spectral energy distribution of a radiant energy source
◉ Spectrophotometer. Answer: Uses a monochromator, measures
luminance of an object where light passes through or is reflected
from the surface.
◉ Purpose of Lighting. Answer: Provide adequate contrast so that
the detection of relevant objects or discontinuities for best
inspection.
◉ Contrast Detection. Answer: Most basic visual task, property of
difference between an object and its background of luminance or
color.
◉ Luminance Contrast. Answer: Difference in reflected light
between discontinuity and background.
◉ Chromatic Contrast. Answer: difference in hue and saturation
between an object and its background
, ◉ Quality of lighting. Answer: distribution of light sources in the
area
◉ Harsh Shadows. Answer: generally cause eye strain but some
shadow effect can accentuate contrast and aid in detection of depth
and form
◉ Shadows. Answer: controlled by horizontal illumination produced
by a light source or reflection from luminant walls.
◉ Direct Area/Room Lighting. Answer: 90%-100% output directed
downward. High illuminance in vertical direction.
◉ Semi-Direct Area/Room Lighting. Answer: 60%-90% output
directed downward. Eliminates ceiling shadows, avoid using bright
ceilings.
◉ General Diffuse Area/Room Lighting. Answer: Approximately
equal amounts of light directed both vertical directions, minimal
glare.
◉ Task Lighting. Answer: designed to illuminate work areas where
strong, bright light simplifies detail work
GUIDE 2026 COMPLETE SOLUTIONS VERIFIED
◉ Spectroradiometer. Answer: Uses a monochromator, measures
spectral energy distribution of a radiant energy source
◉ Spectrophotometer. Answer: Uses a monochromator, measures
luminance of an object where light passes through or is reflected
from the surface.
◉ Purpose of Lighting. Answer: Provide adequate contrast so that
the detection of relevant objects or discontinuities for best
inspection.
◉ Contrast Detection. Answer: Most basic visual task, property of
difference between an object and its background of luminance or
color.
◉ Luminance Contrast. Answer: Difference in reflected light
between discontinuity and background.
◉ Chromatic Contrast. Answer: difference in hue and saturation
between an object and its background
, ◉ Quality of lighting. Answer: distribution of light sources in the
area
◉ Harsh Shadows. Answer: generally cause eye strain but some
shadow effect can accentuate contrast and aid in detection of depth
and form
◉ Shadows. Answer: controlled by horizontal illumination produced
by a light source or reflection from luminant walls.
◉ Direct Area/Room Lighting. Answer: 90%-100% output directed
downward. High illuminance in vertical direction.
◉ Semi-Direct Area/Room Lighting. Answer: 60%-90% output
directed downward. Eliminates ceiling shadows, avoid using bright
ceilings.
◉ General Diffuse Area/Room Lighting. Answer: Approximately
equal amounts of light directed both vertical directions, minimal
glare.
◉ Task Lighting. Answer: designed to illuminate work areas where
strong, bright light simplifies detail work
