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1_POF EXAM PREP1

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POF EXAM PREP1
tsampikos pompou
Quiz by tsampikos pompou, updated more than 1 year ago More Less
tsampikos pompou
Created by tsampikos pompou over 8 years ago
tsampikos pompou
Copied by tsampikos pompou over 8 years ago
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Question 1

Question
1 2On a standard atmosfaire the conditions at sea level are]
Answer
  • O 15 C, 1013,2 Mb
  • O 0 C, 29,92 Mb
  • O 15 C, 29,92 Mb
  • O 0 C, 1013,2 Mb

Question 2

Question
2 As the altitude increases the air density...
Answer
  • O decreases
  • O increases
  • O remains constant

Question 3

Question
3 As the altitude increases the air pressure...
Answer
  • O decreases
  • O increases
  • O remains constant
  • O depends on the day

Question 4

Question
4 Weel fairings on airgraft's landing gear decreases...
Answer
  • O interferance drag
  • O form drag
  • O induced drag

Question 5

Question
5 laminar flow boundary layer compared to turbulent boundary layer is...
Answer
  • O thinner]
  • O thikker
  • O having the same thickness

Question 6

Question
6 Figure POF01. Line a is called
Answer
  • O Chord Line
  • O Leading Edge
  • O Trailing Edge
  • O Mean Camber Line

Question 7

Question
7 Figure POF01. Line (c) is called
Answer
  • O Mean Camber Line
  • O Chord Line
  • O Leading Edge
  • O Trailing Edge

Question 8

Question
8 Figure POF02. Line (4) is called
Answer
  • O Maximum Airfoil Thickness
  • O Chord Line
  • O Leading Edge
  • O Trailing Edge

Question 9

Question
9 Figure POF01. Point (a) is called
Answer
  • O Leading Edge
  • O Mean Camber Line
  • O Chord Line
  • O Trailing Edge

Question 10

Question
10 Figure POF01. Point (e) is called
Answer
  • O Trailing Edge
  • O Leading Edge
  • O Mean Camber Line
  • O Chord Line

Question 11

Question
11 Figure POF03. Angle (a) is called
Answer
  • O sweepback
  • O angle of attack
  • O angle of incidence

Question 12

Question
12 When an aircraft is decelarating in a straight and level flight the induced drag...
Answer
  • O increases
  • O decreases
  • O remains the same

Question 13

Question
13 When an aircraft is decelarating in a straight and level flight the parasite drag...
Answer
  • O decreases
  • O increases
  • O remains the same

Question 14

Question
14 The lowest drag during straight and level flight is achieved...
Answer
  • O At a spesific angle of attack
  • O At a spesific speed
  • O At the stall speed
  • O At Vne

Question 15

Question
15 In a stable aircraft during straight and level flight the horizonta stabilizer produces lift...
Answer
  • O downwards
  • O upwards
  • O equal to zero

Question 16

Question
16 It is more possible for a pilot to have a tail strike during landing when landing with flaps up
Answer
  • O True
  • O False

Question 17

Question
17 An aircraft has a stalling speed of 55 kts, in straight and level flight with no power. With a higher weight the stalling speed will
Answer
  • O increase
  • O decrease
  • O reamain the same

Question 18

Question
18 An aircraft has a stalling speed of 55 kts, in straight and level flight with no power. With a higher engine output the stalling speed will
Answer
  • O decrease
  • O increase
  • O reamain the same

Question 19

Question
19 During an airplane's steady climb, lift is less than weight
Answer
  • O True
  • O False

Question 20

Question
20 We can decrease trim drag by...
Answer
  • O moving th CG as aft as permitable
  • O moving th CG as forward as permitable
  • O increasinvg the flight speed
  • O decreasing the flight speed

Question 21

Question
21 Figure POF04. The flaps type that coresponde with the letter (a) are called...
Answer
  • O Simple
  • O Split
  • O Slotted
  • O Fowler

Question 22

Question
22 Figure POF04. The flaps type that coresponde with the letter (b) are called...
Answer
  • O Split
  • O Simple
  • O Slotted
  • O Fowler

Question 23

Question
23 Figure POF04. The flaps type that coresponde with the letter (c) are called...
Answer
  • O Fowler
  • O Simple
  • O Split
  • O Slotted

Question 24

Question
24 Figure POF04. The flaps type that coresponde with the letter (d) are called...
Answer
  • O Slotted
  • O Simple
  • O Split
  • O Fowler

Question 25

Question
25 An airplane has a maximum maneuvering speed of 85 kts, in a given weight. With a higher weight the maximum maneuvering speed will
Answer
  • O increase
  • O decrease
  • O reamain the same

Question 26

Question
31 Dihedral angle contributes to the stability around the _____ axis
Answer
  • O longitutinal
  • O lateral
  • O vertical

Question 27

Question
32 Sweep angle contributes to the stability around the _____ axis
Answer
  • O vertical
  • O longitutinal
  • O lateral

Question 28

Question
33 The Horizontal stabilizer contributes to the stability around the _____ axis
Answer
  • O lateral
  • O vertical
  • O longitutinal

Question 29

Question
34 The vertical stabilizer contributes to the stability around the _____ axis
Answer
  • O vertical
  • O lateral
  • O longitutinal

Question 30

Question
35 It is a desirable wing characteristic to develop the stall from the tip toward the root]
Answer
  • O False
  • O True

Question 31

Question
36 During an airplane's steady descent, thrust is less than drag
Answer
  • O True
  • O False

Question 32

Question
37 In a constant speed, straight and level flight, as the airplane's weight is decreasing due to fuel consumption...
Answer
  • O the angle of attack decreases
  • O the angle of attack increases
  • O the angle of attack remains the same

Question 33

Question
38 When the angle of attack exceeds the critical angle of attack coefficient of lift inceases rapidly]
Answer
  • O False
  • O True

Question 34

Question
39 the drag coeficient (Cd) of an airplane
Answer
  • O No correct answer
  • O it is maximus on Vne
  • O it is maximus on Vso
  • O it is maximus on VsI

Question 35

Question
40 An airplane is approaching the stall having a right ball indication on the inclinometer. There is a danger that the airplane after the stall will enter a right spin
Answer
  • O False
  • O True

Question 36

Question
41 An airplane is approaching the stall having a right ball indication on the inclinometer. There is a danger that the airplane after the stall will enter a left spin
Answer
  • O True
  • O False

Question 37

Question
42 An airplane is approaching the stall having a left ball indication on the inclinometer. There is a danger that the airplane after the stall will enter a right spin
Answer
  • O True
  • O False

Question 38

Question
43 An airplane is approaching the stall having a left ball indication on the inclinometer. There is a danger that the airplane after the stall will enter a left spin
Answer
  • O False
  • O True

Question 39

Question
44 A single engine airplane with a clockwise rotating propeller is climbing with a very steep angle an the pilot is not countering the left turning tendency. If the airplane stalls under these conditions...
Answer
  • O a left spin is possible
  • O a right spin is possible
  • O a spin is impossible

Question 40

Question
45 The lift coefficient (Cl) is changing with a change of...
Answer
  • O the angle of attack
  • O the flight altitude
  • O the airspeed
  • O the lift

Question 41

Question
46 The drag coefficient (Cd) is changing with a change of...
Answer
  • O the angle of attack
  • O the flight altitude
  • O the airspeed
  • O the lift

Question 42

Question
47 in a straight and level flight when the airplane speed increases...
Answer
  • O the lift coefficient decreases.
  • O the lift coefficient increases.
  • O the lift coefficient remains unchanged

Question 43

Question
48 in a straight and level flight when the airplane speed decreases...
Answer
  • O the lift coefficient increases.
  • O the lift coefficient decreases.
  • O the lift coefficient remains unchanged

Question 44

Question
49 An airplane that exceeded a bank angle of 60°has the tendency...
Answer
  • O to increase its bank angle to 90°
  • O to gradualy decrease its bank angle
  • O to maintain its bank angle

Question 45

Question
50 An airplane that not exceeded a bank angle of 30°has the tendency...
Answer
  • O to gradualy decrease its bank angle
  • O to increase its bank angle to 90°
  • O to maintain its bank angle

Question 46

Question
51 The "T" tail system compare to the conventional system has the advandage of...
Answer
  • O less interference drag
  • O less induced drag
  • O less surface drag
  • O less weight

Question 47

Question
52 airfoil is]
Answer
  • O a cross section of the wing, parallel to the plan of symmetry of the aircraft] .
  • O a cross section of the wing at the joining point with the airframe] .
  • O a cross section of the wing at the middle of it.
  • O a cross section of the wing at the wing tip

Question 48

Question
53 angle of attack is]
Answer
  • O the angle between wing cord and the relative wind
  • O the angle between the wing cord and the longitudinal axis
  • O the angle between the wing cord and the lateral axis
  • O the dihedral angle

Question 49

Question
54 Sweep angle is]
Answer
  • O the angle between a line that connects the points on ? chord distance from the leading edge and a line perpendicular to the plane of symmetry of the aircraft
  • O the dihedral angle of the aircraft
  • O the angle between the leading edge and the longitudinal axis of a wing
  • O the angle between the leading edge and the lateral axis of the aircraft

Question 50

Question
55 center of prerssure is called]:
Answer
  • O the point where lift is applied on the wing
  • O the center of gravity of the aircraft
  • O the point wher the landing gear is attached to the wing
  • O the point where the weight of the wing is applied when the fuel tank is full

Question 51

Question
56 what is called Mean Aerodynamic Chord]
Answer
  • O is the chord of a hypothetical rectangular wing, that produces the same lift and at the same point as the real wing
  • O the mean value of the chord of a wing
  • O is the length of the wing chord at the middle of the wing
  • O is the length of the wing chord at the center of pressure of the wing

Question 52

Question
57 the coefficient of lift depends on]
Answer
  • O angle of attack
  • O air density
  • O the airspeed2

Question 53

Question
58 the higher part of the lift produced by an airfoil is applied]:
Answer
  • O on the upper surface as underpressure
  • O on the lower surface as overpressure
  • O on the frontal surface as drag

Question 54

Question
59 the thickness of the boundary layer around an airfoil…]
Answer
  • O increases when the altitude increases
  • O increases when the speed of the free airstream increases
  • O increases when the viscosity of the air increases

Question 55

Question
60 The critical angle of attack
Answer
  • O gives the coefficient of lift just before stall
  • O gives the minimum (negative) coefficient of lift
  • O gives coefficient of lift equal to zero
  • O gives the maximum coefficient of lift

Question 56

Question
61 Stall speed Vs is]
Answer
  • O it is not fixed and depends on the power output of the engine
  • O the speed when the aircraft flies straight and level at the critical angle of attack
  • O is the speed when flying at an angle of attack equal to zero
  • O is the speed when flying at a negative angle of attack

Question 57

Question
62 The stalling speed of an airplane Vs…
Answer
  • O depends on power output of the engine
  • O depends on altitude
  • O depends on ground speed
  • O no correct answer

Question 58

Question
63 the symbol of maneuvering speed is]..
Answer
  • O Va.
  • O VLO.
  • O VNE.
  • O no correct answer

Question 59

Question
64 the symbol of the maximum speed with the Flaps full down is
Answer
  • O VFE.
  • O VLOF
  • O VFC
  • O no correct answer

Question 60

Question
65 the symbol of the maximum speed with the Landing Gear full down is
Answer
  • O VLE.
  • O VLO.
  • O VFE.
  • O no correct answer

Question 61

Question
66 the speed range up to VNO is defined as]
Answer
  • O normal operating range
  • O never exceed speed
  • O maximum cruising speed
  • O no correct answer

Question 62

Question
67 VSO speed is called]
Answer
  • O stall speed in landing configuration
  • O stall speed in specified configuration
  • O stall speed or minimum safe take off speed
  • O no correct answer

Question 63

Question
68 the use of Flaps… ]
Answer
  • O increases drag, increases lift, decreases the critical angle of attack
  • O increases drag, increases lift, increase the critical angle of attack
  • O increases drag, decreases lift, decreases the critical angle of attack
  • O decreases drag, increases lift, increases the critical angle of attack

Question 64

Question
69 Usually we use maximum Flaps deflection ]
Answer
  • O only during landing
  • O during take off and landing
  • O only during take off and only on short runways
  • O only during take off, on pilot discretion

Question 65

Question
70 the purpose of aerodynamic trim of the controls is…]
Answer
  • O to reduce the force needed to move the controls
  • O the return of the controls to the neutral position when released
  • O to increase the rate of turn of the aircraft
  • O to coordinate the movement of all controls

Question 66

Question
71 Longitudinal dihedral is called]
Answer
  • O the difference of the angle of incidence of the wing and the tail plane relative to the longitudinal axis
  • O the difference of the angle of incidence of the left wing and the right wing relative to the longitudinal axis
  • O the difference of the angle of incidence of the left tail horizontal wing and the right tail horizontal wing relative to the longitudinal axis
  • O the difference of the angle of incidence of the wing and the horizontal stabilizer relative to the longitudinal axis

Question 67

Question
72 The use of Flaps during landing results in the…]:
Answer
  • O increase of the descend angle without an increase of the airspeed
  • O reduction of the descend angle without an increase of the airspeed
  • O landing with an increase IAS
  • O increase of angle of descent due to the reduction of lift

Question 68

Question
73 Refer to figure POF07. What is the speed range that is permitted to use the flaps .
Answer
  • O 60-100 Kts.
  • O 65-165 Kts.
  • O 60-208 Kts.
  • O 165-208 Kts

Question 69

Question
74 Refer to figure POF07. What is the maximum speed with the flaps down
Answer
  • O 100 Kts.
  • O 165 kts.
  • O 65 Kts.
  • O 60 Kts.

Question 70

Question
75 Refer to figure POF07. What color range symbolizes the range of speed that is permitted to use the flaps
Answer
  • O the white arc]
  • O from the lower speed of the white arc up to the upper level of the green arc
  • O the green arc
  • O the yellow arc

Question 71

Question
76 Refer to figure POF07. What color and which point on the instrument indicate the stalling speed with no thrust, landing gear and flaps in landing configuration].
Answer
  • O the low end of the white arc
  • O the high end of the green arc
  • O the high end of the white arc
  • O the low end of the green arc

Question 72

Question
77 Which aircraft's speed limit is not depicted on the color coding of the Airspeed indicator]
Answer
  • O Maximum maneuvering speed
  • O Never exceed speed
  • O Maximum cruising speed
  • O Maximum speed with the flaps down

Question 73

Question
78 The 4 forces acting on an aircraft in flight are]
Answer
  • O Engine thrust, lift, weight, drag
  • O Engine power, speed, gravity, drag
  • O Engine power, speed, weight, friction
  • O Engine thrust, lift, gravity, weight

Question 74

Question
79 In which case do the 4 forces acting on an aircraft equal to zero];
Answer
  • O During straight and level non accelerated flight
  • O With the aircraft still on the ground
  • O When the aircraft is accelerating
  • O When the aircraft is decelerating

Question 75

Question
80 What is the relationship between the forces of lift, drag, thrust and weight during straight and level non accelerated flight]
Answer
  • O lift and weight = thrust and drag
  • O lift = drag and thrust = weigh
  • O lift, drag and weight = thrust
  • O lift = weight and thrust = drag

Question 76

Question
81 What makes an aircraft turn
Answer
  • O the horizontal coefficient of lift
  • O The centrifugal force
  • O The coordinated effect of rudder and ailerons
  • O The ruder, ailerons and elevator

Question 77

Question
82 Refer to figure POF08, The angle A is called]
Answer
  • O angle of incidence
  • O dihedral angle
  • O angle of attack
  • O camber angle

Question 78

Question
83 The angle of attack is defined as]
Answer
  • O the angle between the wing chord and the relative wind
  • O the angle between the climb vector of the aircraft and the horizon
  • O the angle between the longitudinal axis and the chord of the aircraft
  • O the angle when the Lift to Drag ratio is the highest

Question 79

Question
84 Refer to figure POF09. If the aircraft's weight is 2.300 lb, what is the weight that his structure has to withstand during a level turn with an angle of 60 degrees relative to the horizon]
Answer
  • O 4.600 lb.
  • O 3.400 lb.
  • O 2.300 lb.
  • O 5.200 lb.

Question 80

Question
85 Refer to figure POF09. If the aircraft's weight is 3.300 lb, what is the weight that his structure has to withstand during a level turn with an angle of 30 degrees relative to the horizon]
Answer
  • O 3.960 lb.
  • O 3.100 lb.
  • O 1.200 lb.
  • O 7.220 lb.

Question 81

Question
86 Refer to figure POF09. If the aircraft's weight is 5.400 lb, what is the weight that his structure has to withstand during a level turn with an angle of 55 degrees relative to the horizon ]
Answer
  • O 9.180 lb.
  • O 5.400 lb.
  • O 6.720 lb.
  • O 10.800 lb.

Question 82

Question
87 Refer to figure POF09. If the aircraft's weight is 4.500 lb, what is the weight that his structure has to withstand during a level turn with an angle of 45 degrees relative to the horizon ]
Answer
  • O 6.750 lb.
  • O 4.500 lb.
  • O 7.200 lb.
  • O 12.000 lb.

Question 83

Question
88 Refer to figure POF09. The highest bank angle that the aircraft's wing can have without exceeding 4,4 G is]
Answer
  • O 77°
  • O 71°
  • O 73°
  • O 83°

Question 84

Question
89 One of the main reasons that we use flaps during landing is]
Answer
  • O to increase the angle of descend without increasing the aircraft's speed]
  • O to reduce the lift in order to have a steeper descend angle]
  • O to allow for greater speeds when the wheels contact the runway]
  • O to decrease the angle of descent, without increasing the aircraft's speed

Question 85

Question
90 the function of the vertical stabilizer is]
Answer
  • O to stabilize the aircraft around the vertical axis
  • O to control the tendency for left or right bank
  • O to reduce the slip or skid
  • O to maintain the turn after banking the aircraft

Question 86

Question
91 Flaps are needed to:
Answer
  • O allow the pilot to maintain high angle of descent during landing, without high speed
  • O allow the pilot to reduce speed
  • O increase the wing's lift by increasing its surface
  • O increase the drag, and as a result more thrust is required during landing

Question 87

Question
92 The number of G's applied on the airframe depend on]
Answer
  • O the bank of the aircraft during a level turn
  • O the position of the center of gravity
  • O The airspeed of the aircraft
  • O the stalling angle of attack

Question 88

Question
93 What will be the effect of load factor (G forces) on an aircraft approaching the stall]
Answer
  • O the aircraft will stall on a higher speed
  • O the aircraft will have a tendency to enter a spin
  • O the control of the aircraft will be more difficult
  • O the aircraft will have a tendency to rotate around the vertical and the longitudinal when approaching the stall speed

Question 89

Question
94 Which basic aircraft maneuver increases the load factor in relation to straight and level flight]
Answer
  • O turns
  • O climb
  • O stall
  • O slip

Question 90

Question
95 What is the basic advantage of a stable aircraft]
Answer
  • O is easily controlable
  • O it is impossible to spin
  • O it is difficult to stall
  • O it is not experiencing extreme bank angles during steep turns

Question 91

Question
96 Which factors affect aircraft stability along the longitudinal axis]
Answer
  • O the position of Center of Gravity relative to the Center of Pressure
  • O the effectivity of the elevator, the elevator trim and the rudder
  • O the relationship between thrust and lift to drag and weight
  • O the dihedral angle and sweep angle

Question 92

Question
97 What causes an aircraft to nose down when reducing engine power, without adjusting the elevator (T-tailed aircraft are exempted)]
Answer
  • O The downward force created from the air stream of the propeller hitting the horizontal stabilizer is reduced therefore the elevator is less effective
  • O The Center of Gravity moves forward when thrust and drag is reduced
  • O As the thrust becomes less than the weight, lift also decreases and the wings cannot support the weight of the aircraft
  • O the air pressure applied by the propeller on the wings decreases and also the angle of attack decreases

Question 93

Question
98 An aircraft is loaded with its center of gravity out of the aft center of gravity limit. The flight is dangerous because]
Answer
  • O the aircraft will not recover after a stall
  • O the aircraft will need more runway for take off
  • O the aircraft stalls at an unpredictable higher speed
  • O it is difficult to land the aircraft

Question 94

Question
99 How the flight characteristics of an aircraft are affected when the Center of Gravity is at its aft limit ]
Answer
  • O the aircraft will be less stable at all speeds
  • O the aircraft will be less stable at low speeds and more stable at high speeds
  • O the aircraft will be more stable at low speeds and less stable at high speeds
  • O the aircraft will be more stable at all speeds

Question 95

Question
100 when frost remains on the aircraft's wings before flight]
Answer
  • O take off may be difficult or impossible
  • O this can have as a result the take off with a lower angle of attack and at a lower indicated airspeed
  • O no problem exists since frost will be blown off by the pressure of the air during take off
  • O it will increase the camber of the wing and as a result more lift will becreated during take off

Question 96

Question
101 when is it possible for an aircraft to stall]
Answer
  • O at any speed and altitude
  • O only when the aircraft's nose is high and the speed low
  • O only when its speed falls below the published stall speed
  • O only when the aircraft's nose is high in relation to the horizon

Question 97

Question
102 during a left spin which wing(s) is (are) stalled]
Answer
  • O both wings are stalled
  • O neither wing is stalled
  • O only the left wing is stalled
  • O only the right wing is stalled

Question 98

Question
103 the stalling angle of attack
Answer
  • O remains the same irrespectively of the weight
  • O increases as the center of gravity moves forward
  • O is changing as the take off weight increases
  • O decreases as the center of gravity moves aft

Question 99

Question
104 At a given configuration, as the flight altitude increases, the stalling indicated airspeed
Answer
  • O remains the same as in lower altitudes
  • O decreases as the true airspeed decreases
  • O decreases as the true airspeed increases
  • O increase because the air density decreases

Question 100

Question
105 What is the required aircraft's condition in order for the aircraft to spin]
Answer
  • O to be stalled
  • O to be close to stall, one wing low and idle power
  • O to be in a steep dive and rotation at the same time
  • O to be in a steep climb with idle power
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