AVIA 400 Quiz 3 (solved) Fall 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.
➢ False

Question 2- Airframe noise is usually at slower speeds and higher at
the speeds involved in cruise and descent.
➢ Lower

Question 3- The semicircular canals react primarily to steady velocities, not
accelerations.
➢ True

Question 4- Acceleration is the rate of change of velocity.
➢ True

Question 5- Gray out and blackout are caused by hypoxia.
➢ Stagnant

Question 6- A comparison of speech intensity to noise intensity is called the
➢ Signal-to-noise ratio (SNR)

Question 7- - Sensory illusions involving primarily the semicircular canals are often
referred to as illusions.
➢ Somatogyral 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.
➢ True

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.
➢ average of 178 seconds

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.
➢ False