ATPL Principles of Flight - deel 2

Transcription

1 ATPL Principles of Flight - deel 2 1. If flaps are deployed at constant IAS in straight and level flight, the magnitude of tip vortices will eventually: (flap span less then wing span) A decrease B remain the same C increase D increase or decrease, depending on the initial AOA 2. If the continuity equation is applicable, what will happen to the air density (rho) if the cross sectional area of a tube changes: (low speed, subsonic and incompressible air flow) A density depends on the change of a tube area B rho1c rho=rho2 D rho>rho2 3. Low speed pitch up is caused by the: A mach trim system B spanwise flow on a swept back wing C wing tip vortex D spanwise flow on a swept forward wing 4. In a turn the loadfactor n and the stalling speed Vs will be: A n smaller than 1, Vs higher than in straight and level flight B n smaller than 1, Vs lower than in straight and level flight C n greater than 1, Vs higher than in straight and level flight D n greater than 1, Vs lower than in straight and level flight 5. Air passes a normal shock wave, which of the following statements is correct: A the temp decreases B the temp increases C the velocity increases Page 1 of 9 - Print date: 7 May 2018

2 D the pressure decreases 6. Which of the following statements, about a venturi in a subsonic air flow are correct: 1: The dynamic pressure in the undisturbed flow and in the throat are equal 2: The totall pressure in the undisturbed flow and in the throat are equal A 1 correct, 2 incorrect B 1 incorrect, 2 correct C 1 and 2 correct D 1 and 2 incorrect 7. An aeroplane has a stall speed of 100 kt at a loadfactor n=1. In a turn with a loadfactor n=2 the stalling speed will be: A 141 kt B 200 kt C 70 kt D 282 kt 8. Which combination of design features is known to be responsible for deep stall: A straight wing and a T-tail B swept back wings and a T-tail C swept back wings and wing mounted engines D straight wings and aft fuselage mounted engines 9. Which phenomenon is counteracted with differential aileron deflection: A turn coordination B sensitivity for spiral dive C ailleron reversal D adverse yaw 10. When air is passing through a shockwave the rho will: A decrease Page 2 of 9 - Print date: 7 May 2018

3 B decrease and beyond a certain mach number start increasing again C increase D stay constant 11. If the nose of an aeroplane yaws to the left this causses: A a roll to the right B a decrease in relative airspeed on th right wing C an increase in lift on the left wing D a roll to the left 12. Which of the following statements about static lateral stability and directional stability is correct: A aereoplanes with an excessive static directional stability in relation to it's static lateral stability, will be prone to dutch rolll B The effect of static lateral and static directional stability are completely independent of each other because they take place about different axis C An aeroplane with an excessive static directional stability in relation it's static lateral stability will be prone to spiral dive (spiral instability) D Static directional stability can be increased by instel wing more powerful engines 13. Extention of fowler flap type trailing edge lift augmentation devices will produce: A a nose up pitching moment B no pitching moment C a force which reduces drag D a nose down pitching moment 14. Floating due to ground effect during an approach to land will occur: A when the height is less than half of the lenght of the wingspan above the suface B When a higher than normal AOA is used C at a speed approaching the stall D when the height is less than twice the lenght of the wing span above the surface 15. in order to maintain straight and level flight at constant airspeed, whilst the flap are being retracted, the AOA will: A increase or decrease depending on the type of flap Page 3 of 9 - Print date: 7 May 2018

4 B increase C reamins constant D decrease 16. On a non swept wing, when the aerofoil is accelerated from subsonic to supersonic The A.C shifts from: A remains unchanged B shifts from 25 % to about 50 % of the airfoil chord C slightly shifts forward D shifts aft by about 10 % 17. Wat voor flap is dit: Krueger flap 18. Which of the following statements is correct: A static stability means that the aeroplane is also dynamically stable about the relevant axis B Dynamic stability means that faster being displaced from original equilibrum condition, the aeroplane will return to that condition without oscillation C Dynamic stability is possible only when the aeroplane is statically stable about the relevant axis D a dynamically stable aeroplane would be almost impossible to fly manually 19. The aspect ration of the wing is: A is the ratio between chord and root chord B is the ratio between the wing span and the root chord C is the ratio between the tip chord and the wing span D is the ratio between the wing span and the mean geometric chord 20. If the altitude is increased and the TAS reamins constant in standard troposphere the M Number will: A increase B increase or decrease, depends on the type of aircraft C decrease D not change Page 4 of 9 - Print date: 7 May 2018

5 21. What is the position of the elevator in relation to the THS of a power assisted aeroplane. Which is in trim: A At a forward C.G the elevator is deflected upwards and at an aft C.G the elevator is deflected downward B The elevator deflection (compared to the stabilizer position) is always zero C The position depends on speed and the position of the C.G D The elevator is always deflected slightly downwards in oder to have sufficient remaing flare capability 22. The wing of an aeroplane will never stall at low subsonic speeds unless: A the AOA is smaller than the value at which the stall occurs B there is a nose down attitude C the IAS exceeds the power-on stall speed D the CAS exceeds the power-on stall speed 23. If the sum of moments in flight is not zero the aeroplane will rotate about it's: A the A.C of the wing B the C.P of the wing C the C.G D the neutral point of the aeroplane 24. When the C.G position is moved forward, the elevator deflection for an manoevre with a load factor greater than 1 will be: A dependent on trim position B larger C unchanged D smaller 25. When comparing a rectangular wing and a swept wing of the same wing ara and wing the sweepback wing has the advantage of: A higher critical mach number B increased longitudinal stability C greater strength D lower stalling speed Page 5 of 9 - Print date: 7 May 2018

6 26. The additional increase of drag at mach numbers above the critiacal mach number is due to: A increased skin friction B increased AOA C increased interference drag D wave drag 27. Wat voor flap is dit: Fowler flap 28. What should be usally done to perform a landing with the stabalizer jammed in the cruise flight position: A use the mach trimmer until after landing B if possible, relocate as many passengers as possible to the front of the cabin C choose a lower landing speed than normal D choose a higher landing speed than normal and/or use a lower flap setting for landing 29. The application of the area rule on aeroplane design will decrease the: A wave drag B form drag C skin friction drag D induced drag 30. The units of measurement of pressure is: A kg/dm2 B kg/m3 C lb/gal D psi 31. The turn coordinator show a right turn. The slip indicator is left to neutral, to coordinate the turn: A less right bank is required B more right rudder is required C a higher turn rate is required D more right bank is required Page 6 of 9 - Print date: 7 May 2018

7 32. After take off the slats (if installed) are alwasy retracted later than the flaps, why: A because Vmc air with slats extended is more favourable compared to the flaps extended position B because flpas extended gives a large decrease in stall speed with ralative less drag C because slats extended provides a better vieuw from the cockpit than flaps extended D Because slats extended gives a large decrease in stall speed with relative less drag 33.If a symmetrical aerofoil is accelerated from subsonic to supersonic speeds the center of lift will: A forward to the mid chord B forward to the leading edge C aft to the mid chord D aft to the trailing edge 34. Increase of wingloading will: A decrease take off speeds B decrease the minimum gliding angle C increase the stall speeds D increase Clmax 35. The location of the C.P of a positive cambered wing at increasing AOA will: A not shift B shift in spanwise direction C shift forward D shift aft 36. Which statement is coorect: A the stickforce per g increases when center of gravity is moved aft B the stick force per g must have both upper and lower limit in order to assure acceptable control characteristics C if the slope of the fe-n line becomes negative, generally speaking this is not a problem for control of an aeroplane D the stick force per g can only be corrected by means of electronic devices (stability augmentation) in case of an unacceptable value 37. Propeller efficiency may be defined as the ratio between: Page 7 of 9 - Print date: 7 May 2018

8 A the thrust and maximum thust B the thermal power of fuel-flow and shaft power C the usable (power available) power and the maximum power D the usable (power available) power of the propeller and shaft power 38. The regime of flight from the critical mach number op to m=1,3 called the: A supersonic regime B subsonic regime C hypersonic regime D transonic regime 39. Which of the following statements is correct: A dihdral is necessary for the excecution of slip free turns B dihedral contributes to dynamic but not to static lateral stability C effective dihedral is the angle between 1/4-chord line and the lateral axis of the plane D the effective dihedral of an aeroplanecomponent means the contribution of that component to the static lateral stability Antwoorden 1 A 2 C 3 B 4 C 5 B 6 B 7 A 8 B 9 D 10 C 11 D 12 C 13 D 14 A 15 B 16 B 17 C 18 C 19 D 20 A 21 C 22 A Page 8 of 9 - Print date: 7 May 2018

9 23 C 24 B 25 A 26 D 27 B 28 D 29 A 30 D 31 D 32 D 33 C 34 C 35 C 36 B 37 D 38 D 39 D De vragen, antwoorden en onderwerpen in de Airwork Examenvraagbaak zijn op basis van aantekeningen van examenkandidaten. Er zijn geen garanties qua nauwkeurigheid en ieder gebruik is voor eigen verantwoordelijkheid. Er kunnen geen rechten aan worden ontleend. Vragen gemerkt met een * zijn officiële oefenvragen van het Nationaal Expert Team. Heb je ook examenvragen en/of -antwoorden voor deze rubriek? Mail ze! Page 9 of 9 - Print date: 7 May 2018