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WorksheetsUnit 2 Fundamentals Review
Total questions: 25
Worksheet time: 12mins
Leonardo da Vinci’s flying machine, the ornithopter, was an invention that ___________.
launched from and landed on water
flapped its wings like a bird
resembled a parachute
had rotating blades, powered by humans
Which of the following best explains why wind tunnels are used in testing the design of aircraft?
To test scale models of airfoils and aircraft
To study why an airplane crashes or malfunctions
To correct any human errors made during manufacturing
To conduct a test flight of an aircraft without effects of weather
Which of the following represents a contribution Greek myths made to civilization today?
Early flight techniques
Inspiration for human flight
Earliest designs of airplanes
Scientific concepts related to flight
The angle at which the chord of an aircraft's wing meets the relative wind.
chord angle
critical angle
angle of attack
angle of reference
The ability or tendency to float in water or air or some other fluid.
density
gravity
weight
buoyancy
The degree of compactness of a substance.
density
gravity
weight
buoyancy
What force pulls an aircraft towards the center of the earth?
density
gravity
weight
buoyancy
Which concept(s) best illustrates the mechanics of flying a hot air balloon? Select all that apply.
density
gravity
weight
buoyancy
What does the camber of an airfoil refer to?
The straight line that connects the leading edge to the trailing edge of the wing
The distance between the top and bottom of the wing
The symmetry of the wing
The curve of the wing
Birds generate _______ by flapping their wings.
air pressure
lift and thrust
drag and pull
height and weight
What is the purpose of the burner of a hot air balloon?
It warms the air just outside the balloon causing it to rise.
It warms passengers at high altitudes.
It heats the air inside the balloon causing it to rise.
It lowers the weight of the basket by warming the balloon.
When the four forces of flight are balanced, the flying object is said to have ________.
lift
equilibrium
thrust
velocity
What part of a bird most resembles the propeller on an aircraft?
wings
head
tail
beak
Hot air balloons rise because warm air in the balloon _______, lifting the balloon.
starts to cool
becomes less dense
becomes heavier
evaporates
The aerodynamic force that opposes an aircraft's motion through the air.
lift
drag
weight
gravity
What force pulls an aircraft towards the center of the earth?
density
gravity
weight
buoyancy
For modern day gliders, what does Bernoulli’s Principle demonstrate?
The speed of the air is faster as it hits the top of the wing causing an increase in pressure and creating lift. This permits flight of the glider.
Air slows down as it hits the top of the wing, which increases pressure and creates drag. This permits the flight of the glider.
Air moves faster over the top of the wing than air moving below the wing. This creates an area of low pressure on top of the wing, which lifts the glider up.
An airplane’s wing is an obstacle to the oncoming air. As the air meets the wing, its path widens.
Why is air density important when using hot air balloons?
It is a measure of how much air there is surrounding the balloon to help support it.
It is a measure of how much drag there is surrounding the balloon to help stabilize it.
Density of cold air is less than hot air. The cold air presses against the balloon on the outside, pushing it up.
As air inside the balloon gets warmer, the density of the air in the balloon decreases, causing it to rise.
Which type of aircraft performs best with a symmetrical airfoil?
airliner
space shuttle
fighter jet
aerobatic aircraft
Movement of a wing through the air creates _______ on the top of the wing as compared to the bottom of the wing, allowing for lift.
lower pressure
more thrust
less drag
higher pressure
Why did the Wright brothers include a rudder in their airplane design?
To increase the weight of the glider.
To allow the glider to warp its wings.
To reduce the thrust of the engines on the glider.
To prevent the glider from spinning out of control.
In early aviation research, which was the most important contribution of Sir George Cayley?
Created the first self-propelled airplane
Used kites to explain the thrust of an airplane
Described the underlying principles and forces of flight
Discovered the most suitable materials from which to construct an airplane
Fill in the blank. Both the Wright brothers and Leonardo da Vinci based their theories of flight from observations of _______.
parachutes
falling leaves
other engineers
animals in flight
Which is an aircraft whose flight does not depend principally on an engine?
glider
airliner
the Wright Flyer
gyrocopter
A pilot descends a hot air balloon by allowing air to escape through _________.
the basket
the parachute valve
the gores
the propane valve
