Anúncios
1
As altitude increases, the stall speed (IAS):
initially remains constant but at higher altitudes decreases.
remains constant regardless of altitude.
initially remains constant but at higher altitudes increases
remains constant until the tropopause but at higher altitudes increases
2
When a pilot makes a turn in horizontal flight, the stall speed :
increases with the square root of load factor
increases with flap extension
decreases with increasing bank angle
increases with the load factor squared
3
The stall speed in a 60° banked turn increases by the following factor:
1.30.
1.41.
2.00.
1.07.
4
The trailing edge flaps when extended :
significantly increase the angle of attack for maximum lift
increase the zero lift angle of attack
degrade the best angle of glide
significantly lower the drag
5
When trailing edge flaps are extended in level flight, the change in pitching moment, ignoring any effects on the tailplane, will be:
dependent on cg location.
nose up
nose down
zero.
6
Extension of leading edge flaps will:
increase critical angle of attack.
decrease CLmax.
not affect critical angle of attack.
decrease drag.
7
On FAR 23 airplane, the limit load factor in normal category is:
+3,8 G
4,4 G
+3,2 G
+6,0 G
8
If an aircraft is flying at a speed above VA:
An overspeed warning will be indicated.
The airplane can destroy itself when in a bank.
The aircraft can not stall.
A full elevator deflection could cause a structural damage.
9
By what percentage does VA (EAS) alter when the aeroplane's weight decreases by 19%?
4.36% lower.
10% lower
19% lower
No change.
10
Which of these statements about the gust load factor on an aeroplane are correct or incorrect? I. When the slope of the lift curve versus angle of attack curve decreases, the gust load factor decreases. II. When the wing loading decreases, the gust load factor decreases.
I is incorrect, II is incorrect.
I is correct, II is incorrect.
I is correct, II is correct
I is incorrect, II is correct
11
The twisting of a propeller blade from root to tip has been made to:
Provide a constant angle of attack from root to tip.
To prevent excessive stress at the blade tip at high RPM
To ensure its optimum thrust is always achieved at take off.
To provide its greatest thrust toward the blade root.
12
The number of blades in a propeller would be increased:
To increase the efficiency of the variable pitch mechanism
To reduce noise.
To increase power absorption capability
To enable a longer undercarriage to be fitted
13
The propeller noise can be minimised by:
Reduce the RPM of the engine
Increase number of blades.
Decrease the angle of attack of the propeller
Reduce the propeller area.
14
The four forces of lift, weight, thrust and drag in level flight act through:
The Aerodynamic Centre.
The Aft limit
The C of G.
The C of P.
15
An aircraft in flight is affected by loads. These may be classified as:
Compressive, tensile, shear and torsional.
Tensile, shear, twisting and stretching
Thrust, drag, lift and weight.
Compressive, bending, shear and torsional.
16
During the glide, the forces acting on an aircraft are:
Drag, thrust and weight.
Thrust, lift and drag.
Lift, weight and thrust
Lift, drag and weight.
17
In a steady banked turn the lift will:
Equal the centrifugal force.
Equal the centrifugal force minus the weight.
Equal the weight.
Equal the resultant of weight and centrifugal force.
18
In a level banked turn, the stalling speed will:
Increase
very inversely with wing loading.
Decrease
Remain the same
19
Total pressure is: (rho = density)
static pressure minus dynamic pressure.
static pressure plus dynamic pressure.
measured at a small hole in a surface, parallel to the local stream.
½ rho V².
20
The unit of measurement for density is:
kg/m³.
kg/cm²
bar.
psi.
21
The stall speed:
increases with an increased weight.
decreases with an increased weight.
increases with the length of the wingspan.
does not depend on weight.
22
: Which statement is correct?
Flap extension reduces the maximum lift/drag ratio thus reducing the minimum rate of descent
Flap extension reduces the stallspeed, which increases the maximum glide distance.
Flap extension has no effect on the minimum rate of descent as this is only affected by TAS
Spoiler extension increases the stallspeed, the minimum rate of descent and the minimum angle of descent.
23
Consider an aerofoil with a certain camber and a positive angle of attack. At which location will the highest flow velocities occur?
Upper side.
In front of the stagnation point.
In the stagnation point.
Lower side.
24
As the Mach number increases in straight and level flight, a shock wave on the upper surface of the wing will:
move towards the trailing edge.
disappear
not move.
move towards the leading edge.
25
Floating due to ground effect during an approach to land will occur:
when a higher than normal angle of attack is used.
when the height is less than halve of the length of the wing span above the surface.
when the height is less than twice the length of the wing span above the surface.
at a speed approaching the stall.
