Q1. The span-wise flow is caused by the difference between the air pressure on top and beneath the wing and its direction of movement goes from:
B
Q2. The span-wise flow on an unswept wing is from the:
A
Q3. The drag of an aircraft will:
C
Q4. The point where a laminar boundary layer becomes turbulent, is known as:
A
Q5. After the transition point between the laminar and turbulent boundary layer:
C
Q6. Which kind of boundary layer has the strongest change in velocity close to the surface?
C
Q7. Which statement is correct about the laminar and turbulent boundary layer:
D
Q8. The transition point located on the wing is the point where…
B
Q9. Behind the transition point in a boundary layer:
B
Q10. Which of the following statements about boundary layers is correct?
D
Q11. There are two types of boundary layer: laminar and turbulent. One important advantage the turbulent boundary layer has over the laminar type is that:
C
Q12. When comparing the properties of laminar and turbulent boundary layers, which of the following statements is correct?
D
Q13. The boundary layer of a wing is caused by:
D
Q14. Floating due to ground effect during an approach to land will occur:
D
Q15. A laminar boundary layer is a layer, in which:
D
Q16. Laminar flow has:
C
Q17. Skin friction drag resulting from a laminar boundary layer will be:
B
Q18. A laminar boundary layer is ___ and has ___ drag than a turbulent layer:
D
Q19. The boundary layer is considered to be turbulent:
B
Q20. The advantage of a turbulent boundary layer over a laminar boundary layer is:
D
Q21. Which boundary layer, when considering its velocity profile perpendicular to the flow, has the greatest change in velocity close to the surface?
C
Q22. How does the total drag vary as speed is increased from stalling speed (VS) to maximum IAS (VNE) in a straight and level flight at constant weight?
A
Q23. The aeroplane drag in straight and level flight is lowest when the:
B
Q24. The minimum drag speed (TAS):
B
Q25. Which statement is correct at the speed for minimum drag (subsonic)?
A
Q26. Increasing dynamic (kinetic) pressure will have the following effect on the drag of an aeroplane (all other factors of importance remaining constant):
C
Q27. Minimum drag of an aeroplane in straight and level flight occurs at the:
A
Q28. At a load factor of 1 and the aeroplane’s minimum drag speed, what is the ratio between induced drag Di, and parasite drag Dp?
C
Q29. At an aeroplane minimum drag speed, what is the ratio between induced drag Di and profile drag Dp (Di/Dp)?
A
Q30. If the airspeed reduces in level flight below the speed for maximum L/D, the total drag of an aeroplane will:
A
Q31. In subsonic flight, which is correct for VMD?
C
Q32. For a typical wing the optimum angle of attack is approximately:
C
Q33. If the weight of the aircraft is increased, the maximum lift/drag ratio will:
D
Q34. Considering the lift to drag ratio, in straight and level flight which of the following is correct?
A
Q35. The minimum total drag of an aircraft in flight occurs:
B
Q36. The aerodynamic drag of a body, placed in a certain airstream depends amongst others on:
A
Q37. Increasing air pressure will have the following effect on the drag of an aeroplane (angle of attack, OAT and TAS are constant):
B
Q38. The correct drag formula is:
A
Q39. A body is placed in a certain airstream. The airstream velocity increases by a factor 4. The aerodynamic drag will increase with a factor:
C
Q40. A body is placed in a certain airstream. The density of the airstream decreases to half of the original value. The aerodynamic drag will decrease with a factor:
B
Q41. Increasing dynamic pressure will have the following effect on the drag of an aeroplane (all other factors of importance remaining constant):
D
Q42. If EAS is increased by a factor of 4, by what factor would profile drag increase?
D
Q43. The polar curve of an aerofoil is a graphic relation between:
D
Q44. The point in the diagram giving the lowest speed in unaccelerated flight is: (polar diagram)
C
Q45. The point in the diagram corresponding to the minimum value of the drag coefficient is:
B
Q46. That point where airflow leaves the surface of an aerofoil is known as:
C
Q47. Where on the surface of a typical aerofoil will flow separation normally start at high angles of attack:
B
Q48. Where does airflow separation begin?
C
Q49. What is the effect on induced drag on entering the ground effect?
C
Q50. Ground effect is most likely to result in which problem?
C
Q51. On entering ground effect, maintaining flight at the same speed:
B
Q52. What effect on induced drag does entering ground effect have:
B
Q53. What must a pilot be aware of as a result of ground effect?
B
Q54. It is possible to fly an aircraft just clear of the ground at a slightly slower airspeed than that required to sustain level flight at higher altitudes. This is the result of:
C
Q55. An aeroplane is usually affected by ground effect at what height above the surface?
C
Q56. When an aircraft enters ground effect:
C
Q57. When an aeroplane is in ground effect:
C
Q58. What is the effect on induced drag of weight and speed changes?
D
Q59. Induced drag may be reduced by:
B
Q60. Which statement about induced drag and tip vortices is correct?
B
Q61. The induced drag:
A
Q62. Induced drag is created by the:
C
Q63. An aeroplane accelerates from 80 kt to 160 kt at a load factor equal to 1. The induced drag coefficient (i) and the induced drag (ii) alter with the following factors:
C
Q64. The value of the induced drag of an aeroplane in straight and level flight at constant weight varies linearly with:
C
Q65. Assuming no compressibility effects, induced drag at constant IAS is affected by:
B
Q66. Induced drag at constant IAS is affected by:
B
Q67. Excluding constants, the coefficient of induced drag (CDI) is the ratio of:
B
Q68. The induced drag coefficient, CDi is proportional with:
A
Q69. If flaps are deployed at constant IAS in straight and level flight, the magnitude of tip vortices will eventually: (flap span less than wing span)
D
Q70. The induced angle of attack is the result of:
A
Q71. Which location on the aeroplane has the largest effect on the induced drag?
C
Q72. Which of the following will reduce induced drag?
A
Q73. Which of the following wing planforms produces the lowest induced drag? (all other relevant factors constant)
B
Q74. Decreasing the aspect ratio of a wing:
B
Q75. An aeroplane transitions from steady straight and level flight into a horizontal co-ordinated turn with a load factor of 2, the speed remains constant and the:
C
Q76. When wing lift is zero, it’s induced drag is:
A
Q77. The relationship between induced drag and the aspect ratio is:
A
Q78. High Aspect Ratio, as compared with low Aspect Ratio, has the effect of:
C
Q79. What is the effect of high aspect ratio of an aeroplane’s wing on induced drag?
C
Q80. At a constant IAS, induced drag is affected by:
A
Q81. The effect of increasing aspect ratio is to:
A
Q82. What is the effect on induced drag of an increase in aspect ratio?
C
Q83. For an aircraft in level flight, induced drag:
A
Q84. Induced drag of an aircraft would be increased with:
B
Q85. Induced drag is greatest:
A
Q86. Which of the following is the cause of wing tip vortices?
B
Q87. High aspect ratio:
B
Q88. The value of the parasite drag in straight and level flight at constant weight varies linearly with the:
C
Q89. Which component of drag increases most when an aileron is deflected upwards?
D
Q90. How does aerodynamic drag vary when airspeed is doubled? By a factor of:
D
Q91. Which drag components make up Parasite Drag?
Q92. Interference drag is the result of:
C
Q93. The interference drag on an aerofoil are vertical respectively parallel to the:
C
Q94. Assuming all bodies have the same cross-sectional area and are in motion, which body will have the highest pressure drag?
D
Q95. Assuming all bodies have the same cross-sectional area and are in motion, place these bodies in order of decreasing pressure drag. The correct answer is:
C
Q96. The frontal area of a body, placed in a certain airstream is increased by a factor 3. The shape will not alter. The aerodynamic drag will increase with a factor:
D
Q97. When the undercarriage is lowered in flight:
C
Q98. The purpose of streamlining is:
A
Q99. An aeroplane, being manually flown in the speed unstable region, experiences a disturbance that causes a speed reduction. If the altitude is maintained and thrust remains constant, the aeroplane speed will:
B
Q100. In what way do (1) induced drag and (2) parasite drag alter with increasing speed in straight and level flight?
B
Q101. Total drag is the sum of:
C
Q102. The total drag of an aerofoil in two-dimensional flow comprises:
C
Q103. Which statement, about the effects on drag of fitting external tip tanks to the wings of an aeroplane, is correct?
Q104. Which statement, about the effects on drag of fitting external tip tanks to the wings of an aeroplane, is correct?
Q105. Which statement, about the effects on drag of fitting external tip tanks to the wings of an aeroplane, is correct?
Q106. The total drag of a three-dimensional wing consists of:
D
Q107. How does the total drag change, in straight and level flight at constant mass, as speed is increased from flight at constant mass, as speed is increased from the stall speed (VS) to maximum IAS (VNE or VMO)?
A
Q108. At high speed an aircraft will have:
A
Q109. If the weight of an aircraft is increased, for a constant speed:
B
Q110. The effect of changes of aspect ratio on total drag will be:
A
Q111. Winglets:
B
Q112. What is the effect of winglets on the drag of the wing?
A
Q113. Which of the following descriptions most accurately describes the airflow that causes wing tip vortices?
A
Q114. The wake vortices behind a large aircraft begin on takeoff___ and end on landing ___
B
Q115. Downwash is:
C
Q116. Due to the span wise pressure gradient, on an unswept wing at a low angle of attack, producing lift, the airflow:
C
Q117. Which statement concerning the local flow pattern around a wing is correct?
B
Q118. For an aircraft in level flight, as indicated air speed increases:
C
Q119. Which of the following is true?
A
Q120. If the IAS is increased by a factor of 4, by what factor would the drag increase?
D
Q121. What phenomena causes induced drag?
A
Q122. Which of the following decreases induced drag?
C
Q123. What is the cause of induced angle of attack?
A