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ATPL Progress tests > POF Progress Check 1 > Flashcards

POF Progress Check 1 Flashcards

1
Q

About which point does an aircraft rotate?
Select one:

a. The wings
b. The centre of gravity
c. The rudder
d. The main undercarriage

A

b. The centre of gravity

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2
Q

If a force of 500 newton´s moves a mass 1000 metres in 2 minutes, the power used is?
Select one:

a. 4167 watts
b. 250 kilowatts
c. 4 watt
d. 1 egawatt

A

a. 4167 watts

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3
Q

A moving mass of air possesses kinetic energy. An object placed in the path of such a moving mass of air will be subject to which of the following?
Select one:

a. Dynamic pressure
b. Static Pressure
c. Static and dynamic Pressure
d. Dynamic pressure minus static pressure

A

c. Static and dynamic Pressure

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4
Q

Air Density is?
Select one:

a. Mass per unit volume
b. Proportional to temperature and inversely proportional ot pressure
c. Indipendent of both temperature and pressure
d. Dependent only on decreasing pressure with increasing altitude

A

a. Mass per unit volume

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5
Q

When considering the ICAO International Standard Atmosphere and comparing it with the actual atmosphere, which of the following is correct?

1 - Temperature, pressure and density are constantly changing in any given layer of the actual atmosphere

2 - A requirement exists for a hypothetical “standard” atmosphere

3 - The values given in the International Standard Atmosphere exist at a same altitudes in the actual atmosphere

4 - The international Standard Atmosphere was designed for the calibration of pressure instruments and the comparison of aircraft performance calculations.
Select one:

a. 1,2 and 3
b. 2,3 and 4
c. 1,2,3 and 4
d. 1,2 and 4

A

d. 1,2 and 4

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6
Q

When considering the ICAO International Standard Atmosphere, which of the following statements is correct?

1 - The temperature lapse rate is assumed to be uniform at 2°C pr 1000 ft (1,98°C up to a height of 11.000ft)

2 - Sea level temperature is assumed to be 15°C

3 - Sea level static pressure is assumed to be 1.225 kg/m3

4 - Sea level density is assumed to be 1013.25hPa
Select one:

a. 1,2,3 and 4
b. No statements are correct
c. 1,3 and 4
d. 2 only

A

d. 2 only

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7
Q

An aircraft´s critical Mach number is?
Select one:

a. The speed of the airflow when the aircraft first becomes supersonic
b. The speed of the aircraft when the airflow somewhere reaches the speed of sound
c. The indicated airspeed when the aircraft first becomes supersonic
d. The aircraft´s Mach number when airflow over it first reaches the local speed of sound

A

d. The aircraft´s Mach number when airflow over it first reaches the local speed of sound

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8
Q

Dynamic Pressure is?
Select one:

a. The total pressure at a point where a moving airflow is brought completely to rest
b. The amount by which the pressure rises at a point where a moving airflow is brought completely to rest
c. The pressure due to the mass of air pressing down on the air beneath
d. The pressure change caused by heating when a moving airflow is brought completely to rest

A

b. The amount by which the pressure rises at a point where a moving airflow is brought completely to rest

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9
Q

Dynamic pressure is equal to?
Select one:

a. density times speed squared
b. Half the density times the indicated airspeed squared
c. Half the true airspeed times the density squared
d. Half the density times the true airspeed squared

A

d. Half the density times the true airspeed squared

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10
Q

The inputs to an Airspeed indicator are from?
Select one:

a. A static source
b. Pitot pressure
c. A pitot and a static source
d. Pitot, static and density

A

c. A pitot and a static source

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11
Q

When considering air:

1 - Air has mass

2 - Air is not compressible

3 - Air is able to flow or change its shape when subject to even small pressures

4 - The viscosity of air is very high

5 - Moving air has kinetic energy

The correct combination of all true statements is?
Select one:
a. 1,2,3 and 5
b. 2,3 and 4
c. 1 and 4
d. 1,3 and 5
A

d. 1,3 and 5

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12
Q

With increasing altitude, up to about 40.000 ft, the charateristics of air change?

1 - Temperature decreases continuously with altitude

2 - Pressure falls steadily to an altitude of about 36.000 ft, where it then remains constant

3 - Density decreases steadily with increasing altitude

4 - Pressure falls steadily with increasing altitude

The combination of true statements is?
Select one:

a. 3 and 4
b. 1,2 and 3
c. 2 and 4
d. 1 and 4

A

a. 3 and 4

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13
Q

If the pressure on one side of a surface is lower than on the other side?
Select one:

a. A force per unit area will exist, acting in the direction of the lower pressure
b. No force will be generated, other than drag
c. A force will be generated, acting in the direction of the higher pressure
d. The pressure will leak around the sides of the surface, cancelling-out any pressure differential

A

a. A force per unit area will exist, acting in the direction of the lower pressure

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14
Q

If the velocity of an air mass is increased?
Select one:

a. The dynamic pressure will decrease and the static pressure will increase
b. The static pressure will remain constant and the kinetic energy will increase
c. The kinetic energy will increase, the dynamic pressure will increase and the static pressure will decrease
d. The mass flow will stay constant, the dynamic pressure will decrease and the static pressure will increase

A

c. The kinetic energy will increase, the dynamic pressure will increase and the static pressure will decrease

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15
Q

In accordance with the principle of continuity?
Select one:

a. Air accelerates when the cross-sectional area of a stramline flow is reduced
b. When air accelerates the density of air in a streamline flow is increased
c. Air decelerates when the cross-sectional area of a stramline flow is increased
d. Changes in cross-sectional area of a streamline flow will affect the air velocity.

A

d. Changes in cross-sectional area of a streamline flow will affect the air velocity.

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16
Q

The statement, APressure plus Kinetic Energy is constant, refers to?
Select one:

a. Bernoulli´s theorem
b. The principle of continuity
c. Newton´s second law of motion
d. The Magnus effect

A

a. Bernoulli´s theorem

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17
Q

The statement, “Energy and mass can neither be created nor destroyed, only changed from one form to another” refers to?
Select one:

a. Bernoulli´s theorem
b. The equation of kinetic energy
c. The principle of continuity
d. Bernoulli´s principle of continuity

A

c. The principle of continuity

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18
Q

An aerofoil section is designed to produce lift resulting from a difference in the?
Select one:

a. Negative air pressure below and a vacum above the surface
b. Vacuum below the surface and greater air pressure above the surface
c. Higher air presure below the surface and lower air pressure above the surface
d. Higher air pressure at the leading edge than at the trailing edge

A

c. Higher air presure below the surface and lower air pressure above the surface

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19
Q

When the angle of attack of a positively cambered aerofoil is increased, the centre of pressure will?
Select one:

a. Have very little movement
b. Move forward along the chord line
c. Remain unaffected
d. Move along the chord

A

b. Move forward along the chord line

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20
Q

Ice contamination of the leading portion of the aerofoil has which of the following consequences?

  1. The profile of the leading portion of the surface can be changed, preventing normal acceleration of the airflow and substantially reducing the magnitude of the lift force
  2. Form (pressure) drag will be increased because of the increased frontal area of the aerofoil section
  3. Loss of lift will have a greater effect than an increase in form (pressure) drag.
  4. At “normal” angles of attack lift can be lost entirely if enough ice accumulates
    Select one:

a. 1,2,3 and 4
b. 1,3 and 4
c. 1,2 and 3
d. 3 and 4

A

a. 1,2,3 and 4

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21
Q

The angle between the chord line of an aerofoil section and the relative wind is known as the angle of?
Select one:

a. Incidence
b. Lift
c. Attack
d. Sweepback

A

c. Attack

22
Q

The angle between the chord line of an aerofoil section and the longitudinal axis is known as the angle of:
Select one:

a. The angle of attack
b. The angle of incidence
c. Dihedral
d. Sweep back

A

b. The angle of incidence

23
Q

The definition of Lift is?
Select one:

a. The aerodynamic force which acts perpendicular to the chord line of the aerofoil
b. The aerodynamic force that results from the pressure differential about an aerofoil
c. The aerodynamic force which acts perpendicular to the upper surface of the aerofoil
d. The aerodynamic force which acts at 90° to the relative airflow

A

d. The aerodynamic force which acts at 90° to the relative airflow

24
Q

When considering an aerofoil section at a constant angle of attack, which of the following statements is true?
Select one:

a. If the static pressure on one side is reduced more than on the other side, a pressure differential will exist
b. If dynamic pressure is increased, the pressure differential will decrease
c. The pressure differential will increase if the dynamic pressure is decreased
d. Dynamic pressure and pressure differential are not related

A

a. If the static pressure on one side is reduced more than on the other side, a pressure differential will exist

25
Q

When considering the effect of changing angle of attack on the pitching moment of an aerofoil, which of the following statements is correct?

  1. At “normal” angles of attack the pitching moment is nose up
  2. The pitching moment about the aerodynamic centre (AC) is constant at normal angles of attack
  3. The aerodynamic centre (AC) is located approx at the 25% chord point
  4. The moment about the aerodynamic centre (AC) is a product of the distance between the aerodynamic centre (AC) and the centre of pressure (CP) and the magnitude of the lift force.
    Select one:

a. 1,2,3 and 4
b. 4 only
c. 3 and 4
d. 2,3 and 4

A

d. 2,3 and 4

26
Q

When the angle of attack of a symmetrical aerofoil is increased, the centre of pressure will?
Select one:

a. Have a very limited movement
b. Move aft along the aerofoil surface
c. Remain unaffected
d. Move toward the leading edge

A

c. Remain unaffected

27
Q

Which of the following statements is correct?

  1. Maximum camber is the maximum distance between the top and bottom surface of a aerofoil section
  2. The thickness/chord ratio is expressed as a percentage of the chord
  3. It is easier for air to flow over a well rounded leading edge radius than a sharp leading edge.
  4. Two dimensional airflow assumes a wing with the same aerofoil section along its entire span, with no spanwise pressure differential
  5. Air flowing towards the lower pressure of the upper surface is called upwash

Select one:

a. 1,2,3,4, and 5
b. 2,3 and 4
c. 2,3,4 and 5
d. 1 and 5

A

c. 2,3,4 and 5

28
Q

Aspect ratio of the wing is defined as the ratio of the?
Select one:

a. Wingspan to the wing root.
b. Square of the chord to the wing span.
c. Wing span to the average chord.
d. Square of the wing area to the span.

A

c. Wing span to the average chord.

29
Q

Aircraft A.

Wingspan: 51 m

Average wing chord: 4 m

Aircraft B.

Wingspan: 48 m

Average wing chord: 3.5 m

Determine the correct aspect ratio and wing area.
Select one:

a. Aircraft A has an aspect ratio of 13.7, and has a larger wing area than aircraft B.

b. Aircraft B has an aspect ratio of 13.7, and has a
smaller wing area than aircraft A.

c. Aircraft B has an aspect ratio of 12.75, and has a smaller wing area than aircraft A.
d. Aircraft A has an aspect ratio of 12.75, and has a smaller wing area than aircraft B.

A

b. Aircraft B has an aspect ratio of 13.7, and has a

smaller wing area than aircraft A.

30
Q

How can an aeroplane produce the same lift in ground effect as when out of ground effect?
Select one:

a. A lower angle of attack
b. A higher angle of attack.
c. The same angle of attack
d. The same angle of attack, but a lower IAS.

A

a. A lower angle of attack

31
Q

How does the wake turbulence vortex circulate around each wingtip, when viewed from the
rear?
Select one:

a. Inward, upward, and around the wingtip
b. Counterclockwise.
c. Outward, upward, and around the wingtip.
d. Outward, downward and around the wingtip.

A

c. Outward, upward, and around the wingtip.

32
Q

If more lift force is required because of greater operating weight, what must be done to fly at the angle of attack which corresponds to C
L MAX?
Select one:

a. Increase the angle of attack.
b. Nothing, the angle of attack for CL MAX is constant.
c. It is impossible to fly at the angle of attack that corresponds to CL MAX
d. Increase the Indicated Air Speed (IAS).

A

d. Increase the Indicated Air Speed (IAS).

33
Q

If the angle of attack is increased beyond the critical angle of attack, the wing will no longer produce sufficient lift to support the weight of the aircraft:
Select one:

a. Unless the airspeed is greater than the normal stall speed
b. Regardless of airspeed or pitch attitude
c. Unless the pitch attitude is on or below the natural horizon
d. In which case, the control column should be pulled-back immediately.

A

b. Regardless of airspeed or pitch attitude

34
Q

If the same angle of attack is maintained in ground effect as when out of ground effect,
lift will?
Select one:

a. Increase, and induced drag will increase.
b. Increase, and induced drag will decrease.
c. Decrease, and induced drag will increase
d. Decrease and induced drag will decrease

A

b. Increase, and induced drag will decrease.

35
Q

Lift on a wing is most properly defined as the?
Select one:

a. Differential pressure acting perpendicular to the chord of the wing.
b. Force acting perpendicular to the relative wind
c. Reduced pressure resulting from a laminar flow over the upper camber of an aerofoil,
d. Force acting parallel with the relative wind and in the opposite direction

A

b. Force acting perpendicular to the relative wind

36
Q

On a wing, the force of lift acts perpendicular to, and the force of drag acts parallel to
the?
Select one:

a. Camber line.
b. Longitudinal axis
c. Chord line
d. Flightpath.

A

d. Flightpath.

37
Q

The angle of attack of a wing directly controls the?
Select one:

a. Angle of incidence of the wing
b. Distribution of pressures acting on the wing
c. Amount of airflow above and below the wing.
d. Dynamic pressure acting in the airflow.

A

b. Distribution of pressures acting on the wing

38
Q

To avoid the wingtip vortices of a departing jet aeroplane during takeoff, the pilot should?
Select one:

a. Remain below the flightpath of the jet aeroplane.
b. Climb above and stay upwind of the jet aeroplane’s flightpath.

c. Lift off at a point well past the jet aeroplane’s
flightpath.

d. Remain below and downwind of the jet aeroplane’s flightpath.

A

b. Climb above and stay upwind of the jet aeroplane’s flightpath.

39
Q

To maintain altitude, what must be done as Indicated Air Speed (IAS) is reduced?
Select one:

a. Decrease angle of attack to reduce the drag
b. Increase angle of attack to maintain the correct lift force
c. Deploy the speed brakes to increase drag
d. Reduce thrust

A

b. Increase angle of attack to maintain the correct lift force

40
Q

What effect does landing at high altitude airports have on ground speed with comparable conditions relative to temperature, wind, and aeroplane weight?
Select one:

a. Higher than at low altitude.
b. The same as at low altitude.
c. Lower than at low altitude.
d. Dynamic pressure will be the same at any altitude.

A

a. Higher than at low altitude.

41
Q

What effect would a light crosswind have on the wingtip vortices generated by a large aeroplane that has just taken off?
Select one:

a. The downwind vortex will tend to remain on the runway longer than the upwind
b. A crosswind will rapidly dissipate the strength of both vortices.
c. A crosswind will move both vortices clear of the runway.
d. The upwind vortex will tend to remain on the runway longer than the downwind

A

d. The upwind vortex will tend to remain on the runway longer than the downwind

42
Q

What flight condition should be expected when an aircraft leaves ground effect?
Select one:

a. A decrease in parasite drag permitting a lower angle of attack.
b. An increase in induced drag and a requirement for a higher angle of attack
c. An increase in dynamic stability
d. A decrease in induced drag requiring a smaller angle of attack

A

b. An increase in induced drag and a requirement for a higher angle of attack

43
Q

What will be the ratio between airspeed and lift if the angle of attack and other factors remain
constant and airspeed is doubled. Lift will be?
Select one:

a. Two times greater
b. Four times greater
c. The same.
d. One quarter.

A

b. Four times greater

44
Q

Which flight conditions of a large jet aeroplane create the most severe flight hazard by generating
wingtip vortices of the greatest strength?
Select one:

a. Heavy, slow, gear and flaps up.
b. Heavy, fast, gear and flaps down
c. Heavy, slow, gear and flaps down.
d. Weight, gear and flaps make no difference

A

a. Heavy, slow, gear and flaps up.

45
Q

Which is true regarding the force of lift in steady, unaccelerated flight?
Select one:

a. There is a corresponding indicated airspeed required for every angle of attack to generate sufficient lift to maintain altitude.
b. An aerofoil will always stall at the same indicated airspeed; therefore, an increase in weight will require an increase in speed to generate sufficient lift to maintain altitude.
c. At lower airspeeds the angle of attack must be less to generate sufficient lift to maintain altitude
d. The lift force must be exactly equal to the drag force.

A

a. There is a corresponding indicated airspeed required for every angle of attack to generate sufficient lift to maintain altitude.

46
Q

Which statement is true, regarding the opposing forces acting on an aeroplane in steady‑state level flight?
Select one:

a. Thrust is greater than drag and weight and lift are equal.
b. These forces are equal
c. Thrust is greater than drag and lift is greater than weight
d. Thrust is slightly greater than Lift, but the drag and weight are equal

A

b. These forces are equal

47
Q

Wingtip vortices created by large aircraft tend to?
Select one:

a. Rise from the surface to traffic pattern altitude.
b. Sink below the aircraft generating the turbulence
c. Accumulate and remain for a period of time at the point where the takeoff roll began
d. Dissipate very slowly when the surface wind is strong

A

b. Sink below the aircraft generating the turbulence

48
Q

Considering Newton´s first law of motion:

1 - A body is said to have energy if it has the ability to work

2 - The amount of energy a body possesses is measured by the amount of work it can do

3 - A body will tend to remain at rest, or in uniform motion in a straight line, unless acted upon by an external force

4 - To move a stationary object or to make a moving object change its direction, a force must be applied

The combination with the correct statements is?
Select one:

a. 3 and 4
b. 1,2,3 and 4
c. 3 only
d. 1 and 2

A

a. 3 and 4

49
Q

The unit of force is?
Select one:

a. Newton-Metre
b. Newton
c. Joule
d. Mass-Kilogram

A

b. Newton

50
Q

The unit of power is called?
Select one:

a. Joule
b. Meter per second
c. Watt
d. Newton-Metre

A

c. Watt

51
Q

The unit of weight is?
Select one:

a. Kilogram
b. Newton
c. Watt
d. Kilowatt

A

b. Newton

ATPL Progress tests (2 decks)

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