NEW
Font size
WorksheetsITS DAAO-Aircraft Structural Loads (FCN 692401)
Total questions: 20
Worksheet time: 10mins
Chord line and mean camber line are in line (identical) on the airfoil have:....
zero lift for positive angle of attack
zero lift for negative angle of attack
zero lift at zero angle of attack
a), b), and c) are not correct
Aerodynamic force that can act along the chord line is...
center of pressure
25%Mac + moment
perpendicular to flight path
all answers are correct
Number 3 on the drawing shows
the chord line
the maximum camber
the thickness
the mean camber line
Number 4 on the drawing shows
the chord line
the maximum camber
the thickness
the mean camber line
Number 5 on the drawing shows
the upper-surface curvature
the maximum camber
the maximum thickness
the mean camber line
Which of the following will develop positive lift?
A symmetrical airfoil at zero Angle of Attack
A nonrotating cylinder in a wind tunnel
A cambered airfoil at zero AOA
A cambered airfoil at high AOA
Which of the following will not produce a pitching moment?
A symmetrical airfoil at a positive Angle of Attack (AOA)
A cambered airfoil that is developing zero lift
A cambered airfoil that is at a positive AOA
A symmetrical airfoil at zero AOA
Which is the following answer is right? For a cambered airfoil, the center of pressure (CP)...
moves to the rear of the wing at low Angle of Attack (AOA)
moves backward as AOA increases
moves forward as AOA increases
Both (a) and (c)
Which is the following statement is wrong false about Aerodynamic Center for the cambered airfoil?
the Aerodynamic Center is where all changes in lift effectively take place
there is no pitching moment at the Aerodynamic Centre
the Aerodynamic Centre is located near 25% C subsonically.
the pitching moment at the Aerodynamic Centre is constant with change of AOA (at constant airspeed).
Which is the following answer is right? For a symmetrical airfoil, the center of pressure...
moves forward as Angle of Attack increases
stays at the same place as AOA increases
there is no pitching moment
Both (b) and (c)
Aircraft mass properties have a significant impact on....
payload-range
capability
flight performance
all answers are correct
What kind of problem will occur in case of overloading in the aircraft ?
The service ceiling is lowered
The cruising speed is reduced
The cruising range is shortened
all answers are correct
The ratio of the bar’s extension to its original length is....
Stress
Strain
Stiffness
Poison’s ratio
The ratio of the aerodynamic force component to the weight of the airplane is...
ground reaction factor
inertia load
aerodynamic load
flight load factor
Maximum lift coefficient depend upon...
airspeed
aircraft weight
airfoil
wing area
The equivalent airspeed which is corrected for...
the instrument error
the position and instrument error
the position and instrument error and the compressibility correction
instrument error and the compressibility correction
Ground loads may cause critical load cases in other parts of the structure such as...
the central wing-rear spar
the horizontal tail box
the front fuselage
both a) and c)
For Landing condition, the airplane is assumed to contact the ground with....
10 ft/sec. descent velocity at design landing weight
10 ft/sec. descent velocity at design take-off weight
6 ft/sec. descent velocity at design landing weight
airplane lift shall exceed airplane weight
Which axis is part of an axis system for structural component?
Input Axes
Output Axes
Elastic Axes
all answers are correct
The net shear, bending and torsion are the superposition of....
Ground load and flight load
Aerodynamic load and the inertia loads
Concentrated load and Flight load
a), b) and c) are not correct
