ATSC 231 - Block 3 Questions with complete solution
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Module
ATSC 231
Institution
ATSC 231
ATSC 231 - Block 3 Questions with complete solution
What are the three hazards resulting from turbulence? - correct answer 1. Loss of Control
2. Airframe Damage
3. Passenger Comfort/Safety
What type of aircraft operations does turbulence produce the greatest frequency of accidents? - cor...
ATSC 231 - Block 3 Questions with
complete solution
What are the three hazards resulting from turbulence? - correct answer ✔1.
Loss of Control
2. Airframe Damage
3. Passenger Comfort/Safety
What type of aircraft operations does turbulence produce the greatest
frequency of accidents? - correct answer ✔Part 121
What is the average annual number of injuries from turbulence? - correct
answer ✔58
What is the definition of aircraft turbulence? - correct answer ✔Irregular
motion of an aircraft in flight, especially when characterized by rapid up-and-
down motion, caused by rapid variations of atmospheric wind velocities.
What is the definition of meteorological turbulence? - correct answer
✔Irregular fluctuations, occurring in fluid motions.
What are the factors that determine the transition from laminar to turbulent
flow? - correct answer ✔- Wind speed
- Surface roughness
- Air density
- Stability
- Viscosity
- Other factors
,What are the two types of turbulent flow? - correct answer ✔1. Wave
2. Eddies or Vorticies
Describe the characteristics of waves and eddies. - correct answer ✔Wave:
regular oscillation of wind
Eddies: vortices embedded in the mean wind flow (size, advection, gusts)
Which scale represents turbulent motions for aircraft? - correct answer
✔Microscale
What are the factors that determine lift? - correct answer ✔- Coefficient of lift
(AOA)
- Air density
- Airspeed
- Wing area
How does the coefficient of lift change with angle of attack? - correct answer
✔The coefficient of lift increases with angle of attack.
What is load factor? - correct answer ✔The ratio of the total air load acting
on an aircraft to the gross weight of the aircraft.
What are factors that affect load factor in turbulence? - correct answer ✔-
Gusts
- Airspeed
- Wing Loading
, How do vertical gusts affect load factor? - correct answer ✔Vertical gusts
increase load factor.
How does airspeed affect load factor? - correct answer ✔As airspeed
increases, load factor increases.
What is wing loading? - correct answer ✔Ratio of weight of aircraft to wing
surface area.
How does wing loading affect load factor? - correct answer ✔Gust load
factor is inversely proportional to wing loading. (Higher wing loading, smaller
load factor)
What are the various units that are used to describe the magnitude of
turbulence? - correct answer ✔- Gust: IVSI - fpm
- Acceleration: Accelerometer- G's
- Turbulent Kinetic Energy (TKE): Calculations - m2/s2
- Eddy Dissipation Rate (EDR): ICAO standard
What is convective turbulence? - correct answer ✔Turbulence that results
from rising currents of air.
Generally describe the characteristics of thermals. - correct answer ✔-
Column or Plume model
- Bubble or Vortex Ring
- Vertical Velocity
- Width
- Height
- Length
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