AVIT 309 Exam 2 UPDATED Exam
Questions and CORRECT Answers
What are the three primary sources of orientation in aviation? - CORRECT ANSWER -
Proprioception, vestibular, visual
What percentage of inflight orientation does visual orientation provide? - CORRECT
ANSWER - 90%
Proprioceptive senses allow humans to sense what? - CORRECT ANSWER - Movement
and body position
Vestibular sense allows humans to sense what? - CORRECT ANSWER - Angular
acceleration
What two components make up the vestibular apparatus? - CORRECT ANSWER - Semi-
circular canals & otolith organs
What would be the speed of a turn for sub-threshold acceleration? - CORRECT
ANSWER - Less than 3 degrees per second
What are the two main components of human visual systems? - CORRECT ANSWER -
Central and peripheral
What are the three phases of vision? - CORRECT ANSWER - Photopic, scotopic, mesopic
Where is peak visual acuity located? - CORRECT ANSWER - Central vision, central 2
degree cone
, How large is the human perceptible field of view? - CORRECT ANSWER - 120 x 120
degrees
Where is the night visual blind spot located on the visual field? - CORRECT ANSWER -
Central 2 degrees/central vision
What are the two technologies used for enhanced vision systems? - CORRECT
ANSWER - Light intensification and infrared
What is the recommendation for visual scanning inflight for instruments versus outside the
aircraft? - CORRECT ANSWER - 1⁄4 time inside, 3⁄4 time outside
True or false: SDO may rapidly transition from unnoticed to incapacitating. - CORRECT
ANSWER - TRUE
SDO typically happens when an aviator cannot visually confirm orientation with what? -
CORRECT ANSWER - The horizon
True or false: Fatigue may lead to SDO by causing routine tasks or scans to be skipped. -
CORRECT ANSWER - true
What is the average experience level for pilots involved in SDO- related accidents? - CORRECT
ANSWER - 10 years/1,000 hours
What compensatory reflexive action typically happens to a pilot's head in a banking turn? -
CORRECT ANSWER - Optokinetic cervical reflex
Which SDO illusion affects a pilot's ability to focus their eyes after rolling out of an extended
turn? - CORRECT ANSWER - Oculogyric illusion
Questions and CORRECT Answers
What are the three primary sources of orientation in aviation? - CORRECT ANSWER -
Proprioception, vestibular, visual
What percentage of inflight orientation does visual orientation provide? - CORRECT
ANSWER - 90%
Proprioceptive senses allow humans to sense what? - CORRECT ANSWER - Movement
and body position
Vestibular sense allows humans to sense what? - CORRECT ANSWER - Angular
acceleration
What two components make up the vestibular apparatus? - CORRECT ANSWER - Semi-
circular canals & otolith organs
What would be the speed of a turn for sub-threshold acceleration? - CORRECT
ANSWER - Less than 3 degrees per second
What are the two main components of human visual systems? - CORRECT ANSWER -
Central and peripheral
What are the three phases of vision? - CORRECT ANSWER - Photopic, scotopic, mesopic
Where is peak visual acuity located? - CORRECT ANSWER - Central vision, central 2
degree cone
, How large is the human perceptible field of view? - CORRECT ANSWER - 120 x 120
degrees
Where is the night visual blind spot located on the visual field? - CORRECT ANSWER -
Central 2 degrees/central vision
What are the two technologies used for enhanced vision systems? - CORRECT
ANSWER - Light intensification and infrared
What is the recommendation for visual scanning inflight for instruments versus outside the
aircraft? - CORRECT ANSWER - 1⁄4 time inside, 3⁄4 time outside
True or false: SDO may rapidly transition from unnoticed to incapacitating. - CORRECT
ANSWER - TRUE
SDO typically happens when an aviator cannot visually confirm orientation with what? -
CORRECT ANSWER - The horizon
True or false: Fatigue may lead to SDO by causing routine tasks or scans to be skipped. -
CORRECT ANSWER - true
What is the average experience level for pilots involved in SDO- related accidents? - CORRECT
ANSWER - 10 years/1,000 hours
What compensatory reflexive action typically happens to a pilot's head in a banking turn? -
CORRECT ANSWER - Optokinetic cervical reflex
Which SDO illusion affects a pilot's ability to focus their eyes after rolling out of an extended
turn? - CORRECT ANSWER - Oculogyric illusion
