Questão 1
Questão 2
Questão
At higher altitudes as altitude increases, pressure
Questão 3
Questão
When the pressure is half of that at sea level, what is the altitude?.
Responda
-
12,000 ft.
-
18,000 ft.
-
8,000 ft.
Questão 4
Questão
If gauge pressure on a standard day at sea level is 25 PSI, the absolute pressure is.
Responda
-
39.7 PSI.
-
10.3 PSI.
-
43.8 PSI.
Questão 5
Questão
Pressure decreases.
Responda
-
inversely proportional to temperature.
-
proportionally with a decreases in temperature.
-
Pressure and temperature are not related.
Questão 6
Questão
As air gets colder, the service ceiling of an aircraft.
Responda
-
reduces.
-
increases.
-
remains the same.
Questão 7
Questão
What is sea level pressure?.
Responda
-
1012.3 mb.
-
1013.2 mb.
-
1032.2 mb.
Questão 8
Questão
How does IAS at the point of stall vary with height?.
Questão 9
Questão
What is the lapse rate with regard to temperature?
Responda
-
4°C per 1000 ft.
-
1.98°C per 1000 ft.
-
1.98°F per 1000 ft.
Questão 10
Questão
Standard sea level temperature is.
Responda
-
20 degrees Celsius
-
0 degrees Celsius.
-
15 degrees Celsius.
Questão 11
Questão
As altitude increases, pressure.
Questão 12
Questão
Lapse rate usually refers to.
Responda
-
Density.
-
Pressure
-
Temperature
Questão 13
Questão
Temperature above 36,000 feet will.
Responda
-
increase exponentially
-
decrease exponentially
-
remain constant
Questão 14
Questão
With increasing altitude pressure decreases and.
Responda
-
temperature decreases at the same rate as pressure reduces.
-
temperature decreases but at a lower rate than pressure reduces
-
temperature remains constant to 8000 ft
Questão 15
Questão
What is the temperature in comparison to ISA conditions at 30,000ft?.
Questão 16
Questão
At what altitude is the tropopause?.
Responda
-
36,000 ft.
-
57,000 ft.
-
63,000 ft.
Questão 17
Questão
What approximate percentage of oxygen is in the atmosphere?.
Questão 18
Questão
Which has the greater density?.
Responda
-
Air at low altitude.
-
Air at high altitude.
-
It remains constant.
Questão 19
Questão
At what altitude does stratosphere commence approximately?.
Responda
-
Sea level.
-
36,000 ft.
-
63,000 ft.
Questão 20
Questão
A pressure of one atmosphere is equal to.
Responda
-
14.7 psi.
-
1 inch Hg.
-
100 millibar.
Questão 21
Questão
The millibar is a unit of.
Responda
-
atmospheric temperature
-
pressure altitude.
-
barometric pressure.
Questão 22
Questão
With an increase in altitude under I.S.A. conditions the temperature in the troposphere.
Responda
-
remains constant.
-
decreases.
-
increases.
Questão 23
Questão
A barometer indicates.
Responda
-
pressure
-
density
-
temperature.
Questão 24
Questão
The amount of water vapour capacity in the air (humidity holding capacity of the air) is.
Responda
-
greater on a colder day, and lower on a hotter day
-
doesn't have a significant difference.
-
greater on a hotter day and lower on a colder day
Questão 25
Questão
Which condition is the actual amount of water vapour in a mixture of air and water?.
Responda
-
Relative humidity.
-
Absolute humidity
-
Dew point.
Questão 26
Questão
Which will weigh the least?.
Responda
-
98 parts of dry air and 2 parts of water vapour
-
50 parts of dry air and 50 parts of water vapour
-
35 parts of dry air and 65 parts of water vapour.
Questão 27
Questão
Which is the ratio of the water vapour actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure?.
Responda
-
Absolute humidity
-
Dew point.
-
Relative humidity
Questão 28
Questão
The speed of sound in the atmosphere
Responda
-
changes with a change in pressure.
-
varies according to the frequency of the sound.
-
changes with a change in temperature.
Questão 29
Questão
What is sea level pressure?.
Responda
-
1032.2 mb.
-
1012.3 mb.
-
1013.2 mb.
Questão 30
Questão
Which statement concerning heat and/or temperature is true?.
Responda
-
Temperature is a measure of the kinetic energy of the molecules of any substance.
-
Temperature is a measure of the potential energy of the molecules of any substance.
-
There is an inverse relationship between temperature and heat.
Questão 31
Questão
What is absolute humidity?.
Responda
-
The temperature to which humid air must be cooled at constant pressure to become saturated.
-
The actual amount of the water vapour in a mixture of air and water.
-
The ratio of the water vapour actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure.
Questão 32
Questão
The temperature to which humid air must be cooled at constantpressuretobecome saturated is called.
Responda
-
relative humidity.
-
dew point.
-
absolute humidity.
Questão 33
Questão
Density changes with altitude at a rate.
Questão 34
Questão
Above 65,800 ft temperature.
Responda
-
decreases by 1.98°C up to 115,000 ft.
-
remains constant up to 115,000 ft.
-
increases by 0.303°C up to 115,000 ft.
Questão 35
Questão
At sea level, ISA atmospheric pressure is.
Responda
-
14.7 kPa.
-
10 Bar
-
14.7 PSI.
Questão 36
Questão
On a very hot day with ambient temperature higher than ISA, the pressure altitude is 20,000 ft. How much will the density altitude be?.
Responda
-
the same
-
greater than 20,000ft
-
less than 20,000ft
Questão 37
Questão
The atmospheric zone where the temperature remains fairly constant is called the.
Responda
-
Stratosphere.
-
Ionosphere.
-
Troposphere.
Questão 38
Questão
In the ISA the height of the tropopause is
Responda
-
11,000 feet.
-
11,000 metres
-
36,000 metres
Questão 39
Questão
In the ISA the sea level pressure is taken to be.
Responda
-
14 PSI.
-
1013.2 mb.
-
1.013 mb
Questão 40
Questão
In the ISA the temperature lapse rate with altitude is taken to be :
Questão 41
Questão
Put in sequence from the ground up
Responda
-
tropopause, stratosphere, troposphere.
-
tropopause, troposphere, stratosphere.
-
troposphere, tropopause, stratosphere.
Questão 42
Questão
The International Standard Atmosphere can be described as.
Responda
-
the atmosphere at 45 degrees north latitude.
-
the atmosphere at the equator with certain conditions
-
the atmosphere which can be used Worldwide to provide comparable performance results.
Questão 43
Questão
The temperature lapse rate below the tropopause is.
Responda
-
1°C per 1000 ft.
-
2°C per 1000 ft.
-
3°C per 1000 ft.
Questão 44
Questão
Above the tropopause air pressure
Questão 45
Questão
Which of the following is correct?.
Responda
-
Absolute pressure + Atmospheric pressure = Gauge pressure
-
Absolute pressure = Gauge pressure + Atmospheric pressure
-
Atmospheric pressure = Absolute pressure + Gauge pressure
Questão 46
Questão
As the altitude increases what happens of the ratio of Nitrogen to Oxygen?.
Responda
-
Increases.
-
Decreases.
-
Stays the same.
Questão 47
Questão
What happens to the density of air as altitude is increased?.
Responda
-
Decreases.
-
Stays the same.
-
Increases.
Questão 48
Questão
An aircraft is travelling at a speed of 720 nautical miles per hour. To calculate speed in MPH you.
Responda
-
divide by 0.83.
-
multipy by 0.83
-
multiply by 1.15.
Questão 49
Questão
Lift on a delta wing aircraft
Responda
-
increases with an increased angle of incidence (angle of attack).
-
does not change with a change in angle of incidence (angle of attack).
-
decreases with an increase in angle of incidence (angle of attack).
Questão 50
Questão
The CofP is the point where.
Responda
-
the lift can be said to act.
-
the three axis of rotation meet.
-
all the forces on an aircraft act
Questão 51
Questão
When an aircraft experiences induced drag.
Responda
-
air flows under the wing span wise towards the root and on top of the wing span wise towards the tip.
-
Neither a) or b) since induced drag does not caused by span wise flow.
-
air flows under the wing span wise towards the tip and on top of the wing span wise towards the root.
Questão 52
Questão
At stall, the wingtip stagnation point.
Questão 53
Questão
The rigging angle of incidence of an elevator is.
Responda
-
the angle between the bottom surface of the elevator and the longitudinal datum.
-
the angle between the bottom surface of the elevator and the horizontal in the rigging position.
-
the angle between the mean chord line and the horizontal in the rigging position.
Questão 54
Questão
Which of the following is true?.
Responda
-
Lift acts at right angles to the relative airflow and weight acts vertically down.
-
Lift acts at right angles to the wing chord line and weight acts vertically down.
-
Lift acts at right angles to the relative air flow and weight acts at right angles to the aircraft centre line.
Questão 55
Questão
The vertical fin of a single engined aircraft is.
Responda
-
parallel with the longitudinal axis but not the vertical axis.
-
parallel with both the longitudinal axis and vertical axis.
-
parallel with the vertical axis but not the longitudinal axis.
Questão 56
Questão
What happens to air flowing at the speed of sound
when it enters a converging duct?.
Responda
-
Velocity increases, pressure and density decreases.
-
Velocity, pressure and density increase.
-
Velocity decreases, pressure and density increase
Questão 57
Questão
As the angle of attack of an airfoil increases the centre of pressure.
Responda
-
remains stationary.
-
moves aft.
-
moves forward.
Questão 58
Questão
Vapour trails from the wingtips of an aircraft in flight are caused by.
Responda
-
low pressure above the wing and high pressure below the wing causing vortices.
-
low pressure above the wing and high pressure below the wing causing a temperature rise.
-
high pressure above the wing and low pressure below the wing causing vortices.
Questão 59
Questão
The chord line of a wing is a line that runs from.
Responda
-
the centre of the leading edge of the wing to the trailing edge.
-
half way between the upper and lower surface of the wing.
-
one wing tip to the other wing tip.
Questão 60
Questão
The angle of incidence of a wing is an angle formed by lines.
Responda
-
parallel to the chord line and longitudinal axis
-
parallel to the chord line and the vertical axis.
-
parallel to the chord line and the lateral axis
Questão 61
Questão
The centre of pressure of an aerofoil is located.
Responda
-
30 - 40% of the chord line forward of the leading edge
-
50% of the chord line back from the leading edge.
-
30 - 40% of the chord line back from the leading edge
Questão 62
Questão
Compressibility effect is.
Responda
-
drag associated with the form of an aircraft.
-
the increase in total drag of an aerofoil in transonic flight due to the formation of shock waves.
-
drag associated with the friction of the air over the surface of the aircraft.
Questão 63
Questão
A high aspect ratio wing will give.
Responda
-
high profile and low induced drag.
-
low profile and high induced drag.
-
low profile and low induced drag.
Questão 64
Questão
Aerofoil efficiency is defined by.
Responda
-
lift over drag.
-
lift over weight.
-
drag over lift.
Questão 65
Questão
The relationship between induced drag and airspeed is, induced drag is.
Responda
-
directly proportional to the square of the speed.
-
directly proportional to speed.
-
inversely proportional to the square of the speed.
Questão 66
Questão
What is the definition of Angle of Incidence?.
Responda
-
The angle the underside of the mainplane or tailplane makes with the horizontal
-
The angle the underside of the mainplane or tailplane makes with the longitudinal datum line.
-
The angle the chord of the mainplane or tailplane makes with the horizontal.
Questão 67
Questão
What is Boundary Layer?.
Responda
-
Separated layer of air forming a boundary at the leading edge
-
Sluggish low energy air that sticks to the wing surface and gradually gets faster until it joins the free stream flow of air.
-
Turbulent air moving from the leading edge to trailing edge.
Questão 68
Questão
What is the collective term for the fin and rudder
and other surfaces aft of the centre of gravity that
helps directional stability?
Responda
-
Empennage.
-
Fuselage surfaces.
-
Effective keel surface
Questão 69
Questão
A decrease in incidence toward the wing tip may be
provided to
Responda
-
prevent adverse yaw in a turn.
-
retain lateral control effectiveness at high angles of attack
-
prevent span wise flow in maneuvers.
Questão 70
Questão
For a given aerofoil production lift, whereP = pressure and V = velocity.
Responda
-
P1 is greater than P2, and V1 is less than V2.
-
P1 is greater than P2, and V1 is greater than V2.
-
P1 is less than P2 and V1 is greater than V2.
Questão 71
Responda
-
increases stalling speed, landing speed and landing run.
-
increases lift, stalling speed and maneuverability
-
decreases stalling speed, landing speed and landing run.
Questão 72
Questão
As a general rule, if the aerodynamic angle of incidence (angle of attack) of an aerofoil is slightly increased, the centre of pressure will.
Questão 73
Questão
The 'wing setting angle' is commonly known as.
Responda
-
angle of dihedral
-
angle of incidence.
-
angle of attack.
Questão 74
Questão
When does the angle of incidence change?.
Questão 75
Questão
As the angle of attack decreases, what happens to the centre of pressure?.
Questão 76
Questão
A decrease in pressure over the upper surface of a wing or aerofoil is responsible for.
Responda
-
approximately 2/3 (two thirds) of the lift obtained.
-
approximately 1/2 (one half) of the lift obtained
-
approximately 1/3 (one third) of the lift obtained.
Questão 77
Questão
Which of the following types of drag increases as the aircraft gains altitude?.
Responda
-
Interference drag.
-
Parasite drag.
-
Induced drag.
Questão 78
Questão
The layer of air over the surface of an aerofoil which is slower moving, in relation to the rest of the airflow, is known as.
Responda
-
none of the above
-
camber layer.
-
boundary layer.
Questão 79
Questão
What is a controlling factor of turbulence and skin friction?.
Questão 80
Questão
If the C of G is aft of the Centre of Pressure.
Responda
-
when the aircraft yaws the aerodynamic forces acting forward of the Centre of Pressure.
-
changes in lift produce a pitching moment which acts to increase the change in lift.
-
when the aircraft sideslips, the C of G causes the nose to turn into the sideslip thus applying a restoring moment.
Questão 81
Questão
The upper part of the wing in comparison to the lower.
Responda
-
develops less lift
-
develops the same lift.
-
develops more lift.
Questão 82
Questão
What effect would a forward CG have on an aircraft on landing?.
Responda
-
Increase stalling speed.
-
Reduce stalling speed.
-
No effect on landing.
Questão 83
Questão 84
Questão 85
Questão
An aspect ratio of 8 : 1 would mean.
Questão 86
Questão 87
Questão
For any given speed, a decrease in aircraft weight, the induced drag will.
Responda
-
decrease
-
remain the same
-
increase.
Questão 88
Questão
The amount of lift generated by a wing is.
Responda
-
greatest at the tip.
-
constant along the span
-
greatest at the root.
Questão 89
Responda
-
greatest towards the tip and downwash decreases from tip to root
-
greatest towards the wing tip and downwash is greatest towards the root
-
greatest towards the wing root and downwash is greatest at the tip
Questão 90
Responda
-
never equal to profile drag.
-
equal to profile drag at Vmd
-
equal to profile drag at stalling angle