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Principles of Flight

Total questions: 53

Worksheet time: 22mins

Name
Class
Date
1.

As angle of attack increases

a)

lift decreases and induced drag decreases

b)

lift decreases and induced drag increases

c)

lift increases and induced drag decreases

d)

lift increases and induced drag increases

2.

The Wright Brothers understood that they'd have to find three solutions (objectives) to three problems. Stated simply those solutions were:

a)

Yaw, Pitch, Drag

b)

Lift, Control, Thrust

c)

Weight, Drag, Thrust

d)

Parasite Drag, Induced Drag, Total Drag

3.

The diagram illustrates the Four Forces Of Flight. Forces that oppose each other are

a)

Lift and Drag

b)

Lift and Thrust

c)

Drag and Weight

d)

Thrust and Drag

4.

The photo is of wing flaps

a)

used to increase lift and decrease drag

b)

which increase dihedral at the lateral axis

c)

used to increase lift and increase drag

d)

which increase airspeed at increased angles of attack

5.

Drag on a glider is created by _________ resistance.

a)

air

b)

water

c)

Soil

d)

weight

6.

What is the force that propels an aircraft forward?

a)

Drag

b)

Thrust

c)

Weight

d)

Lift

7.

__________________ is related to Mass but also includes the gravitational pull.

a)

Thrust

b)

Volume

c)

Lift

d)

Weight

8.

What is the force that allows an aircraft to leave the ground and remain in flight?

a)

Lift

b)

Thrust

c)

Drag

d)

Weight

9.

Check the four forces of flight

a)

Thrust

b)

Lift

c)

Speed

d)

Drag

e)

Weight

10.

The main body of the aircraft is called the ___________

a)

Tube

b)

Middle

c)

Fuselage

d)

Wings

11.

Which force use to move an aircraft forward ?

a)

Drag

b)

Lift

c)

Thrust

d)

Weight

12.

The job of the engine is to propel the aircraft, not to provide lift.

a)

True

b)

False

13.

Which force works based on a method of fluid dynamics known as Bernoulli’s Principle ?

a)

Thrust

b)

Drag

c)

Lift

d)

Weight

14.

What the pilot will do to slow down the aircraft ?

a)

the pilot will increase the thrust to a value less than that of the drag

b)

the pilot will reduce the thrust to a value less than that of the drag

c)

the pilot will reduce the weight to a value less than that of the lift

d)

the pilot will reduce the weight to a value less than that of the drag

15.

Four forces that allow an airplane to fly are Thrust, lift, drag and weight.

a)

True

b)

False

16.

A force that allows an aircraft to climb or stay in the air, rather than fall to the ground.

a)

Thrust

b)

Drag

c)

Lift

d)

Weight

17.

What is another name for the body of a plane?

a)

cockpit

b)

fuselage

c)

ailerons

d)

wings

18.

________________ is created by air resistance

a)

weight

b)

thrust

c)

lift

d)

drag

19.

_______________ is the force that propels an aircraft forward.

a)

drag

b)

weight

c)

thrust

d)

lift

20.

_________________ is the force that allows the aircraft to leave the ground.

a)

drag

b)

weight

c)

thrust

d)

lift

21.

The forces acting on an aeroplane in flight are...

a)

lift, drag, gravity and thrust

b)

lift, drag, weight and thrust

c)

buoyancy, drag, weight and thrust

d)

buoyancy, drag, gravity and thrust

22.

In order for an aeroplane to stay in the air which force must be greater than the weight

a)

thrust

b)

drag

c)

lift

d)

buoyancy

23.

Which letter represents air at lower pressure?

a)

a

b)

b

c)

c

d)

d

24.

Lift is generated as air tries to move from areas of higher pressure to lower pressure, this would be represented by the movement between which letters

a)

a to c

b)

c to a

c)

b to d

d)

d to b

25.

The angle represented by a is the...

a)

angle of lift

b)

angle of attack

c)

angle of flight

d)

angle of air

26.

Lift is obtained from almost all parts of the wing but not equally from every part. About how much is obtained from the top surface of an aircraft wing such as a Chipmunk?

a)

Up to 33%

b)

Up to 80%

c)

Up to 50%

d)

Up to 25%

27.

Where is the greatest amount of lift normally generated on an aerofoil?

a)

Trailing edge

b)

Leading edge

c)

Top surface

d)

Bottom surface

28.
This is the name of the force that tries to pull an aircraft down.
a)
Thrust
b)
Weight
c)
Drag
d)
Lift
29.
This is the name of the force that tries to pull an aircraft down.
a)
Thrust
b)
Weight
c)
Drag
d)
Lift
30.
This is the name of the force that tries to move an aircraft forward.
a)
Thrust
b)
Weight
c)
Drag
d)
Lift
31.
This is the name of the force that tries to hold an aircraft back.
a)
Thrust
b)
Weight
c)
Drag
d)
Lift
32.
This is the name of the force that tries to push an aircraft up.
a)
Thrust
b)
Weight
c)
Drag
d)
Lift
33.
If the angle of attack becomes too great, this condition can occur.
a)
Dive
b)
Stall
c)
Roll
d)
Yaw
34.
These two forces need to overcome their opposite force in order for an aircraft to fly.
a)
Drag & Weight
b)
Thrust & Weight
c)
Lift & Drag
d)
Lift & Thrust
35.
Which of the following is NOT one of the three primary movement of an aircraft?
a)
Pitch
b)
Roll
c)
Sway
d)
Yaw
36.
What motion occurs on the Vertical Axis?
a)
Pitch
b)
Roll
c)
Sway
d)
Yaw
37.
What motion occurs on the Longitudinal axis?
a)
Pitch
b)
Roll
c)
Sway
d)
Yaw
38.
What motion occurs on the Lateral axis?
a)
Pitch
b)
Roll
c)
Sway
d)
Yaw
39.
Whose Principle is used to describe why flight is possible?
a)
Newton
b)
Descartes
c)
Bernoulli
d)
Pascal
40.
Bernoulli's Principle of Pressure Differential states...
a)
The air moves faster under the wing
b)
The air moves faster over the wing
41.
Faster air movement over an airfoil creates a _________ pressure field, which in turn allows lift.
a)
Higher
b)
Lower
42.
Ailerons are located on the _______ and control __________.
a)
Vertical Stabilizer : Pitch
b)
Wings : Roll
c)
Vertical Stabilizer : Yaw
d)
Wings : Pitch
43.
The Elevator is located on the ________ and controls ___________.
a)
Vertical Stabilizer : Pitch
b)
Horizontal Stabilizer : Yaw
c)
Vertical Stabilizer : Yaw
d)
Horizontal Stabilizer : Pitch
44.
The Rudder is located on the _________ and controls __________.
a)
Vertical Stabilizer : Pitch
b)
Horizontal Stabilizer : Yaw
c)
Vertical Stabilizer : Yaw
d)
Horizontal Stabilizer : Pitch
45.
What two terms are used to determine the Aspect Ratio of an aircraft?
a)
Span & Thrust
b)
Span & Chord
c)
Chord & Yaw
d)
Penn & Teller
46.
This angle refers to the angle the wing is attached to the plane in order to improve stability.
a)
Angle of Attack
b)
Angle of Incidence
c)
Dihedral Angle
d)
Angle of Repose
47.
This angle refers to the angle at which the wings are attached to the fuselage.
a)
Angle of Attack
b)
Angle of Incidence
c)
Dihedral Angle
d)
Angle of Repose
48.
This angle refers to the angle at which the wings cut through the air.
a)
Angle of Attack
b)
Angle of Incidence
c)
Dihedral Angle
d)
Angle of Repose
49.
Given: Symmetrical airfoil, AoA=0. What is the lift generated by the airfoil?
a)
max
b)
min
c)
0
50.
What number is Camber line
a)
1
b)
2
c)
4
51.
What is asymmetrical airfoils
a)
pict. 1
b)
pict. 2
52.
Write down the Lift equation formula
a)
Lift=2 x rho x S x v2 x CL
b)
Lift=1/2 x rho x S x v2 x CL
c)
Lift=1/2 x rho / S x v2 / CL
53.

Airflow over a wing produces pressure differences due to changes in the velocity of the air. This explanation of lift is described by

a)

Bernoulli's Principle

b)

Wright's Theorem

c)

Wilbur's Predicate

d)

Orville's Postulate

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