Free access to EASA ECQB 2022!


To achieve control flutter damping the balance mass must be located ? Exercise > Manual

exemple question 140
In front of control surface hinge. Flutter a dangerous phenomenon encountered in flexible structures subjected to aerodynamic forces as airspeed increases there may be a point at which structural damping insufficient to damp out motions which are increasing due to aerodynamic energy being added to airfoil this vibration can cause structural failure therefore considering flutter characteristics an essential part of designing an aircraft to counteract this phenomenon control surface's cg must be as close as possible of hinge (the torsion axis).


Which of these statements concerning a sandwich structural part are correct or incorrect I The main function of the core material is to stabilise the covering sheets II A sandwich structural part is ?

exemple question 141
Which of these statements concerning a sandwich structural part are correct or incorrect i the main function of core material to stabilise covering sheets ii a sandwich structural part well suited absorbing concentrated loads I correct ii incorrect. Flutter a dangerous phenomenon encountered in flexible structures subjected to aerodynamic forces as airspeed increases there may be a point at which structural damping insufficient to damp out motions which are increasing due to aerodynamic energy being added to airfoil this vibration can cause structural failure therefore considering flutter characteristics an essential part of designing an aircraft to counteract this phenomenon control surface's cg must be as close as possible of hinge (the torsion axis).


When a wing bends upwards aileron flutter might occur if the aileron deflects ?

exemple question 142
When a wing bends upwards aileron flutter might occur if aileron deflects Downwards because location of aileron centre of gravity lies behind hinge line. Flutter a dangerous phenomenon encountered in flexible structures subjected to aerodynamic forces as airspeed increases there may be a point at which structural damping insufficient to damp out motions which are increasing due to aerodynamic energy being added to airfoil this vibration can cause structural failure therefore considering flutter characteristics an essential part of designing an aircraft if cg aft (behind) of torsional axis inertia causes cg of aileron to lag behind any movement of axis caused changes in lift this lag can cause still further changes in incidence hence lift making matter worse by having cg on or forward of hinge (the torsion axis) now uses property of inertia to counter effect.


exemple question 143
Which of these statements regarding cockpit windows are correct or incorrect i on some aeroplanes cockpit windows have an additional speed restriction related to bird impact when window heating inoperative ii cockpit side windows are always provided with a icing system I correct ii incorrect. The force from a bird impact increases with square of speed a hot windshield more pliable less likely to shatter if it gets hit bird strike example on a challenger on modern aircraft (example the boeing 737 800 max) windows l1 r1 l2 r2 have a conductive coating on outer pane that permits electrical heating to prevent build up of ice fogging for those models of aircraft without electric heat to window l3 r3 cabin air circulated around windshield to prevent fogging of window .


exemple question 144
Which of these statements concerning a sandwich structural part are correct or incorrect i the main function of core material sound insulation ii a sandwich structural part well suited absorbing concentrated loads I incorrect ii incorrect. The force from a bird impact increases with square of speed a hot windshield more pliable less likely to shatter if it gets hit bird strike example on a challenger on modern aircraft (example the boeing 737 800 max) windows l1 r1 l2 r2 have a conductive coating on outer pane that permits electrical heating to prevent build up of ice fogging for those models of aircraft without electric heat to window l3 r3 cabin air circulated around windshield to prevent fogging of window .


exemple question 145
Which of these statements regarding cockpit windows are correct or incorrect i cockpit windows never have an additional speed restriction related to bird impact when window heating inoperative ii cockpit side windows are usually defogged only I incorrect ii correct. The force from a bird impact increases with square of speed a hot windshield more pliable less likely to shatter if it gets hit bird strike example on a challenger on modern aircraft (example the boeing 737 800 max) windows l1 r1 l2 r2 have a conductive coating on outer pane that permits electrical heating to prevent build up of ice fogging for those models of aircraft without electric heat to window l3 r3 cabin air circulated around windshield to prevent fogging of window .


exemple question 146
Which of these statements about sandwich structural parts are correct or incorrect i a sandwich structural part consists of fibres and a resin ii a sandwich structural part suitable absorbing concentrated loads I incorrect ii incorrect. The force from a bird impact increases with square of speed a hot windshield more pliable less likely to shatter if it gets hit bird strike example on a challenger on modern aircraft (example the boeing 737 800 max) windows l1 r1 l2 r2 have a conductive coating on outer pane that permits electrical heating to prevent build up of ice fogging for those models of aircraft without electric heat to window l3 r3 cabin air circulated around windshield to prevent fogging of window .


8
Which of these statements regarding cockpit windows are correct or incorrect i cockpit windows never have an additional speed restriction related to bird impact when window heating inoperative ii cockpit side windows are always provided with a icing system I incorrect ii incorrect. The force from a bird impact increases with square of speed a hot windshield more pliable less likely to shatter if it gets hit bird strike example on a challenger on modern aircraft (example the boeing 737 800 max) windows l1 r1 l2 r2 have a conductive coating on outer pane that permits electrical heating to prevent build up of ice fogging for those models of aircraft without electric heat to window l3 r3 cabin air circulated around windshield to prevent fogging of window .


9
Which of these statements regarding cockpit windows are correct or incorrect i on some aeroplanes cockpit windows have an additional speed restriction related to bird impact when window heating inoperative ii cockpit side windows are usually defogged only I correct ii correct. The force from a bird impact increases with square of speed a hot windshield more pliable less likely to shatter if it gets hit bird strike example on a challenger on modern aircraft (example the boeing 737 800 max) windows l1 r1 l2 r2 have a conductive coating on outer pane that permits electrical heating to prevent build up of ice fogging for those models of aircraft without electric heat to window l3 r3 cabin air circulated around windshield to prevent fogging of window .


10
Which of these statements about composite and metal structures are correct or incorrect i for a structural component with given dimensions composite materials enable a structural component's strength to be tailored to direction of load ii composite materials enable structures with higher strength/weight ratio than metal structures I correct ii correct. The force from a bird impact increases with square of speed a hot windshield more pliable less likely to shatter if it gets hit bird strike example on a challenger on modern aircraft (example the boeing 737 800 max) windows l1 r1 l2 r2 have a conductive coating on outer pane that permits electrical heating to prevent build up of ice fogging for those models of aircraft without electric heat to window l3 r3 cabin air circulated around windshield to prevent fogging of window .


11
Which of these statements about composite and metal structures are correct or incorrect i in a structural component with given dimensions constructed of composite materials strength the same in all directions ii composite materials enable structures with lower strength/weight ratio than metal structures I incorrect ii incorrect. For a structural component with given dimensions composite materials enable a structural component's strength to be tailored to direction of load composite materials enable structures with higher strength/weight ratio than metal structures.


12
Which of these statements about composite and metal structures are correct or incorrect i for a structural component with given dimensions composite materials enable a structural component's strength to be tailored to direction of load ii composite materials enable structures with lower strength/weight ratio than metal structures I correct ii incorrect. For a structural component with given dimensions composite materials enable a structural component's strength to be tailored to direction of load composite materials enable structures with higher strength/weight ratio than metal structures.


13
What are three elements of fuselage structure of a large transport aeroplane Skin frames stringers. For a structural component with given dimensions composite materials enable a structural component's strength to be tailored to direction of load composite materials enable structures with higher strength/weight ratio than metal structures.


14
Which of these statements about composite and metal structures are correct or incorrect i in a structural component with given dimensions constructed of composite materials strength the same in all directions ii composite materials enable structures with higher strength/weight ratio than metal structures I incorrect ii correct. For a structural component with given dimensions composite materials enable a structural component's strength to be tailored to direction of load composite materials enable structures with higher strength/weight ratio than metal structures.


15
A sandwich type structure often used in aircraft because of its Low mass high stiffness. For a structural component with given dimensions composite materials enable a structural component's strength to be tailored to direction of load composite materials enable structures with higher strength/weight ratio than metal structures.


16
A wing spar typically consists of Low mass high stiffness. A typical metal spar in a general aviation aircraft usually consists of a sheet aluminium spar web girders with ' or 't' shaped spar caps being welded or riveted to top bottom of sheet to prevent buckling under applied loads.


17
A semi monocoque aircraft fuselage structure usually consists of Skin frames stringers. A typical metal spar in a general aviation aircraft usually consists of a sheet aluminium spar web girders with ' or 't' shaped spar caps being welded or riveted to top bottom of sheet to prevent buckling under applied loads.


18
A sandwich structural part unsuitable absorbing Skin frames stringers. A typical metal spar in a general aviation aircraft usually consists of a sheet aluminium spar web girders with ' or 't' shaped spar caps being welded or riveted to top bottom of sheet to prevent buckling under applied loads.


19
Which of these statements concerning a sandwich structural part are correct or incorrect i the main function of core material sound insulation ii a sandwich structural part unsuitable absorbing concentrated loads I incorrect ii correct. A typical metal spar in a general aviation aircraft usually consists of a sheet aluminium spar web girders with ' or 't' shaped spar caps being welded or riveted to top bottom of sheet to prevent buckling under applied loads.


20
Which of these statements about sandwich structural parts are correct or incorrect i a sandwich structural part consists of two thin sheets enclosing a light core material ii a sandwich structural part suitable absorbing concentrated loads I correct ii incorrect. A typical metal spar in a general aviation aircraft usually consists of a sheet aluminium spar web girders with ' or 't' shaped spar caps being welded or riveted to top bottom of sheet to prevent buckling under applied loads.



Exclusive rights: Content under private and protected license, reproduction prohibited and prosecuted.

679 Free Training Exam