UH 60 APART STUFF EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS GRADED A+
What is Astigmatism? - Answer-irregular shaped cornea
What is Hyperopia - Answer-close obj's not seen clearly
What are the NVG Characteristics and Operation of the (AN/AVS-6) - Answer-- began being utilized by the Army...
UH 60 APART STUFF EXAM QUESTIONS
WITH CORRECT DETAILED ANSWERS
GRADED A+
What is Astigmatism? - Answer-irregular shaped cornea
What is Hyperopia - Answer-close obj's not seen clearly
What are the NVG Characteristics and Operation of the (AN/AVS-6) - Answer-- began
being utilized by the Army in 1969
- intensifies light by 2000-3000 times / amplification is 25,000 times
- 30 minutes remaining when "low voltage" light on helmet illuminates
- best visual acuity is 20/40
- designed to operate with blue/green cockpit lighting
- field of view is 40 degrees through the center of the "tubes"
- ABC (Automatic Brightness Control) reduces voltage to the micro-channel plate to
keep
the image intensifier's brightness within a set limit
- BSP (Bright Source Protection) reduces voltage to the photocathode if the tubes are
exposed to bright light sources; protects image intensifier from damage and enhances
its life
What are NVG Limitations and Techniques? - Answer-- field of view (compensated for
by scanning)
- vision is decreased (compensated by utilizing more than one crewmember)
- cannot judge distances clearly (compensate for by scanning)
What are the Operational(deadline) Defects of ANVIS 6? - Answer-Shading, Edge
Glow, Flashing, Flickering or Intermittent Operation
What are Cosmetic Blemishes of ANVIS 6? - Answer-: Bright Spots, Emission Points,
Black Spots, Fixed Pattern
Noise (Honeycomb), Chicken Wire, Image Disparity, Image Distortion, and Output
Brightness
Variation
In Distance Estimation and Depth Perception what is the G in GRAM? - Answer-
geometric perspective; an object has different shapes when viewed from varying
distances
What is the L in LAV? - Answer-. linear perspective - parallel lines tend to converge
(railroad tracks)
, What is the A in LAV? - Answer-apparent foreshortening - true shape of object appears
elliptical when viewed from a distance
What is the V in LAV? - Answer-vertical position in the field - mistaking lights above for
distant lights
What is retinal image size? - Answer-brain perceives the actual size of an object from
the size of an image focused on the retina.
What is KITO? - Answer-a. known size of an object
b. increasing/decreasing size
c. terrestrial association
d. overlapping contours
What is Aerial perspective? - Answer-clarity of an object & the shadow it produces are
used as cues.
a. variations in color/shade - objects become clearer as you get closer
b. loss of detail/texture - occurs with distance
c. position of light source - if shadow is toward the observer, the object is closer than the
light source is to the observer
What is motion parallax - Answer-the most important of the monocular cues; the relative
motion of
stationary objects moving (i.e. looking out the side as you are flying shows objects
moving fast as opposed to looking out into the distance when objects move slowly or
not at all)
What is false horizons? - Answer-clouds or sloping ground
What is fascination fixation? - Answer-focusing attention on object or goal; common for
attack aircraft
What is flicker vertigo? - Answer-light that flickers @ 4-20 cycles per second can cause
nausea/vomiting;
caused by sunlight flickering through rotor blades or by the rotating
beacon reflecting against an overcast sky (under NVG's especially)
What is confuse ground lights w/ stars? - Answer-confuse ground lights w/ stars
What is relative motion? - Answer-see the movement of another aircraft and interpret it
as your own.
What is auto kinesis? - Answer-staring at a light and it appears to move (occurs around
6 - 12 seconds)
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