Liberty University Online Academy AVIA 400/ AVIA400 quiz 3 (answered) 2021
AVIA 400 Quiz 3 Question 1- Type III (incapacitating) SD occurs when you are aware of your disorientation and can properly take positive control of your aircraft. Question 2- Airframe noise is usually at slower speeds and higher at the speeds involved in cruise and descent. Question 3- The semicircular canals react primarily to steady velocities, not accelerations. Question 4- Acceleration is the rate of change of velocity. Question 5- Gray out and blackout are caused by hypoxia. Question 6- A comparison of speech intensity to noise intensity is called the Question 7- - Sensory illusions involving primarily the semicircular canals are often referred to as illusions. Question 8- Sound wave energy is substantially reduced when passing from a gas (air in outer ear) to a liquid (fluid in inner ear); but the unique mechanical arrangement of the middle ear makes up for this limitation by amplifying the sound energy by as much as 25 dB. Question 9- A study conducted by the University of Illinois in the 1950s found that pilots with insufficient instrument flying ability lose control of their airplane in an average of only once they lose outside visual references. Question 10- Airframe noise is partly a function of indicated airspeed (dynamic air pressure) expressed as 1/2ρV2, where ρ (rho) is the density of the air and V is the true airspeed. Therefore, the slower the airspeed and higher the altitude (lower air density), the greater the aerodynamic noise created around the aircraft’s fuselage. Question 11- According to FAA statistics, more than 90 percent of GA spatial disorientation accidents result in fatalities. Question 12- Noise can contribute to fatigue. Question 13- Noise can be defined as any sound that is loud, unpleasant, or unwanted. Question 14- A recent study comparing the noise levels of a Cessna 172 and a Piper Seminole—two popular GA aircraft used in the United States—found that noise levels exceeded the National Institute for Occupational Safety and Health (NIOSH) standard of 85 dB for eight hours exposure. Question 15- The movement of the sensory hairs in the otolith membrane is the same when the head is tilted downward or when it is upright during forward linear acceleration. Question 16- The physical characteristic of sound which gives the physiological and psychological sensation of pitch is called . Question 17- The physical characteristic of sound which gives the physiological and psychological sensation of loudness is called . Question 18- The organ in which the back-and-forth movement of tiny hair cells hair cells is converted into neural impulses that are sent to the auditory cortex of the brain and interpreted as sound, is the . Question 19- The study of the body’s response to dynamic forces imposed upon it is called . Question 20- Since the 26 letters in English alphabet are not equiprobable, and because of sequential constraints, the English language has a very low redundancy. Question 21- Visual hypoxia brought on by +GZ-induced blood stagnation is a form of hypoxia. Question 22- Sensorineural hearing loss (SNHL), or nerve deafness that arises from loud noise/ sounds that damage the tiny nerve fibers (hairs) in the Cochlea can often be treated with medication or surgery. Question 23- G-LOC normally occurs at a sustained G of about +GZ. Question 24- After recovering from a prolonged spin (or spiral dive), you may experience a strong sensation of turning in the direction of the original angular motion. This may cause you to inadvertently enter a spin (or spiral dive) in the direction of the original spin (or spiral dive). Question 25- Pilots are exposed to elevated levels of noise and are at higher risk of developing noise- induced hearing loss (NIHL).
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- avia 400 quiz 3
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type iii incapacitating sd occurs when you are aware of your disorientation and can properly take positive control of your aircraft
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airframe noise is usually at slower speed
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