Aeroelasticity MCQs
Aeroelasticity MCQs
Try to answer these 80 Aeroelasticity MCQs and check your understanding of the Aeroelasticity subject.
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1: What is the study of the interactions between the inertial, elastic and aerodynamic forces occurring while an elastic body is exposed to a fluid flow?
A. Aeroelasticity
B. Hydrodynamics
C. Aerodynamics
D. Fluid dynamics
2: What type of response is dynamic aeroelasticity concerned with?
A. Material
B. Elastic
C. Vibrational
D. Kinetic
3: Where does divergence occur?
A. Divergence where the lift or drag forces increase
B. Divergence where the aerodynamic forces increase the angle of attack of a wing
C. Divergence at the trailing edge of a wing
D. Divergence at the joints of bones in the body
E. Divergence where the lift force is greater than the drag force
4: Where do aerodynamic forces increase the angle of attack of a wing?
A. Drag
B. The higher the airspeed
C. Lift
D. Divergence
5: What increases the angle of attack of wing?
A. Rudder
B. Airspeed
C. Aerodynamic forces
D. Wing loading
E. Lift
6: What causes control reversal?
A. Feedback failure
B. Increased activity of excitatory neurotransmitters
C. Depletion of the inhibitory neurotransmitter GABA
D. Insufficient supervision
E. Control activation
7: Where does control reversal occur?
A. Control reversal where control input produces an opposite yaw moment
B. Control reversal where control restoration produces an opposite aerodynamic moment
C. Control reversal where control input produces opposite movement of the object
D. Control reversal where control activation produces an opposite aerodynamic moment
E. Control reversal where the controller's goal is not reached
8: What type of moment does reversal of control activation produce?
A. Aerodynamic
B. Electrical
C. Pneumatic
D. Magnetic
9: What is the term used to describe the vibration that can lead to the destruction of an aircraft?
A. Damping
B. Shear
C. Whirlwind
D. Gyration
E. Flutter
10: Flutter refers to the destruction of an aircraft due to what?
A. The shutdown of an engine
B. The use of incorrect methods
C. The uncontained vibration
D. The lack of experience
E. The failure of a structural member
11: What can cause the destruction of an aircraft?
A. Spider webs
B. Ice
C. Structural failure
D. Flutter
E. Incompetent crew
12: Failure of engine supports caused the phenomenon known as what?
A. Stall
B. Whirl flutter
C. Stall speed
D. Turbulence
E. Aerodynamic stall
13: What is another name for flutter?
A. Butterfly flutter
B. Pulsating flutter
C. Wavedash flutter
D. Propeller whirl flutter
14: What structure is supporting the rotating propeller in flutter?
A. Wing
B. Blade
C. Nacelle
D. Rotor
15: Which company had an accident due to flutter in 1959?
A. Eastern Airlines Flight 104
B. Braniff Flight 542
C. Eastern Air Lines Flight 985
D. TWA Flight 847
E. Pan American World Airways Flight 103
16: Failures of what lead to flutter on aircraft?
A. Landing gear
B. Airfoil
C. Wings
D. Engine supports
17: In which year was the first report of "transonic dip"?
A. 1971
B. 1957
C. 1976
D. 1965
E. 1915
18: What is the flutter speed of an aircraft that flies through transonic Mach numbers?
A. Twice the speed of sound
B. Many times the speed of sound
C. Three times the speed of sound
D. Close to flight speed
19: What is another name for the high frequency instability caused by airflow separation or shock wave oscillations from one object striking another?
A. Shear
B. Sonic Boom
C. Shear instability
D. Buffeting
E. Whipping
20: What does the term 'buffeting' refer to?
A. A type of turbulence
B. A high-frequency instability
C. A type of aircraft
D. A low-frequency instability
21: What property is not significant in a study of aeroelasticity?
A. Mass properties
B. Shape properties
C. Material properties
D. Dielectric constant
22: The interaction between what two types of forces is studied by aeroelasticity?
A. Aerodynamic and thermal
B. Aerodynamic and elastic
C. Elastic and gravitational
D. Aerodynamic and gravitational
23: What type of interaction between aerodynamic and elastic forces is aeroelasticity?
A. Dynamic aeroelasticity
B. Flapping aeroelasticity
C. Unstable aeroelasticity
D. Static aeroelasticity studies
E. Spin-up aeroelasticity
24: When a structure deflects under aerodynamic load, it is said to have experienced what phenomenon?
A. Wrong material
B. Divergence
C. Shear
D. Vibration
25: When does divergence occur?
A. When a lifting surface deflects under aerodynamic load
B. When a molten material solidifies
C. When a fluid flows over an obstacle
D. When an object is thrown
E. When two or more objects are placed in contact with each other
26: What is the loss of expected response of a control surface?
A. Positioning deviation
B. Reduction in force
C. Control surface reversal
D. Increased error
E. Increased noise
27: What type of deformation can cause control surface reversal?
A. Thermal
B. Torsional
C. Shear
D. Dynamic
E. Structural
28: What is the term used to describe the interactions among aerodynamic, elastic, and inertial forces?
A. Dynamic Aeroelasticity
B. Static Aeroelasticity
C. Kinetic Aeroelasticity
D. Vibration
29: What type of forces are involved in dynamic aeroelasticity?
A. Aerodynamic, elastic and viscous forces
B. Aerodynamic, elastic, and inertial forces
C. Elastic and viscous forces
D. Aerodynamic and elastic forces
30: What is an example of a dynamic aeroelastic phenomenon?
A. Static Aeroelasticity occurs when the air pressure on an airplane wing changes
B. Dynamic Aeroelasticity studies the interactions among aerodynamic, elastic, and inertial forces
C. Aeroelasticity is the study of the interaction between aerodynamic, elastic, and inertial forces
D. Dynamic pressure wave theory is used to predict flight paths of aircraft
31: What kind of vibration occurs when a lifting surface bends?
A. Flutter
B. Shear
C. Bang
D. Glide
E. Whirl
32: What can flutter occur on besides aircraft?
A. Lights
B. Clouds
C. Plants
D. Animals
E. Structures
33: What is one example of an external atmospheric disturbance?
A. A tornado
B. A thunderstorm
C. Gusts
34: What aspect of an aircraft's structure responds to external atmospheric disturbances?
A. Static response
B. Response to wind shear
C. Dynamic response
D. Structural response
35: What are the loads on components due to unsteady flow?
A. Buffeting loads
B. Normal loads
C. Vibratory loads
D. Shear loads
36: What does aeroelasticity refer to?
A. Thermodynamic response
B. Aerodynamic response
C. Sound
D. Structural response
37: What is an example of the interaction of flow with aircraft structural components?
A. Flutter
B. Venturi effect
C. Pressure differential over the fuselage
D. Aeroelasticity
38: What are multiple events as cycles with variable stress levels called?
A. Periodic oscillations
B. Dynamic loading
C. Cycling
D. Static loading
39: What is a single event?
A. The explosion of an atomic bomb
B. Static loading
C. A sentence
D. A paragraph
40: What is the result of increasing speeds on a wing?
A. Increased drag
B. Lower lift forces
C. Dynamic instability of the elastic structure
D. Higher drag forces
41: What can Flutter on a wing be compared to?
A. A pendulum
B. Dynamic instability of elastic structure in an airstream
C. A non-linear oscillator
D. A sailboat
42: What is the name of the Torsional stiffness not sufficient to maintain structure in a stable position as speed increases?
A. Inertia
B. Shear
C. Divergence on a wing
D. Compression
43: What is an example of insufficient torsional stiffness?
A. Control reversal
B. Dance floor
C. Shock absorber failure
D. Tire blow-out
44: What are the primary structural elements?
A. Tower components
B. Bridge structure elements
C. Aircraft structure elements
D. Ship hull structure elements
45: What does the secondary structure of a plane do?
A. Supports structures
B. Allows light through
C. Holds cargo
D. Carries only air
46: What does the secondary structure of a building act as?
A. Thermal insulation
B. Chair
C. Air
D. Water
47: What term refers to the ratio of minimum stress to maximum stress?
A. Load factor
B. Stress ratio
C. Strain
D. Stresses
48: What are coupon tests?
A. Checks for the validity of coupons
B. Stress-strain diagrams
C. Tests used to measure a person's intelligence
49: In what area are coupon tests conducted?
A. Laboratory testing
B. Pharmaceutical testing
C. Automotive testing
D. Aircraft testing
50: What level of testing is Coupon tests?
A. Level 3
B. Level 1
C. Level 2
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