AE 210 Final Review Exam Study Set
Which of the following would be considered by the USAF to be a valid reason for
designing a new aircraft? - ANSWER Air Mobility Command has a need which can best
be met by designing a new aircraft
Which of the following statements correctly describes one of the influences. World War I
had on aviation? - ANSWER The large number of trained pilots and inexpensive surplus
military aircraft available in the US after the war led to a vast expansion of aviation
activities, enterprises, and public awareness
If you were designing a helicopter to land on the top of Mount Everest, and you did some
research to find out what the atmospheric conditions were there, what step of the
Engineering Method would you be accomplishing? - ANSWER Collect Information
A supersonic jet fighter aircraft with an afterburning turbojet engine and guided missiles
as its only air-to-air weapons is likely from this generation of fighters. - ANSWER 5th
The best way to choose which conceptual design from several contenders that a
company should develop further in preliminary and detail design is: - ANSWER Use a
decision matrix
The sizing equation makes it clear that _________ wing loading and __________
thrust-to-weight ratio will produce the smallest, lightest aircraft that meets the mission
requirements? - ANSWER High, Low
You have sized your aircraft for a 300 nm mission radius and a 4,000-lb payload. For this
mission and design constraints, your sized wing area is 400 sq ft. Your customer
decides to increase the payload requirement to 6,000 lbs. What would you expect the
new sized wing area to be? - ANSWER 600 sq ft
You have chosen a design point wing loading of 100 pounds per square foot (psf) and a
thrust-to-weight ratio of 0.8. With this design point you calculate a mission fuel fraction
of 0.3. What value would you use in the sizing equation for mission fuel wing loading
portion? - ANSWER 30 psf
What are the four fundamental flow properties that define the condition of a fluid? -
ANSWER Temperature, Density, Velocity, and Pressure
When a gas is Perfect, or Ideal, what properties can be related in an equation? -
ANSWER Density, temperature, and pressure
You are flying in your supersonic personal bizjet at an altitude where the speed of sound
is 1,000 ft/s. If your true airspeed is 1,600 ft/s, what is your flight Mach number? -
ANSWER 1.6
, What is the significance of a Point Property? - ANSWER A point property can have a
different value at every point in a flowfield.
If you multiply pressure by area then you get what? - ANSWER Force
The standard atmosphere was built using these three relations: - ANSWER Perfect Gas,
the Hydrostatic Equation, and an empirical temperature profile
According to Figure 2.4, at what altitude is the Tropopause (separating the Troposphere
and Stratosphere.where the temperature stops decreasing with increasing altitude)? -
ANSWER 11 km
How does a standard altimeter work? - ANSWER It is a simple pressure gauge
calibrated in units of altitude instead of pressure
An aircraft's instruments measure an air temperature of 15 deg C and an air pressure of
83 kPa. What is the air density for these conditions? (Use Equation 2.1 which is the Aero
version of the Perfect Gas Law. Also, be sure to convert the temperature to absolute
temperature and convert kPa to Pascals = N/m2) - ANSWER 1.0 kg/m3
A manometer is filled with water. On the first side, the pressure is standard sea level
pressure (P1 = 101,325 Pa). The second side is open to the room. The fluid is 50 cm
higher on the second side than the first side. What is the pressure in the room? -
ANSWER Note: The density of water is 1,000 kg/m^3. Use Equation 2.3 and designate P2
as room pressure and h2 as the height of the water in the side of the manometer
connected to the room. Then, h2-h1 = 50 cm. Substitute into Equation 2.3 and solve for
the pressure in the room. Be careful with units! 96,425 Pa
- ANSWER
The Continuity Equation requires what two assumptions? - ANSWER Steady and
1-Dimensional
Euler's Equation requires what four assumptions? - ANSWER Body forces can be
ignored, steady, inviscid, and along a streamline
Why can we treat the walls of stream tubes as solid boundaries even though they are
just streamlines? - ANSWER Stream tube walls are streamlines and flow can't cross
streamlines because the velocity vectors are everywhere tangent to them.
In Figure 3.9 in your book, what can you say about the flow properties at points 2a and
2b (on top and bottom of the airfoil, respectively)? - ANSWER According to the
continuity equation, the velocity at 2a is faster than 2b
Water flows through a garden hose and exits at the nozzle at 2 ft/s. You place your
thumb over the end of the hose, reducing the area of the nozzle from 1 square inch to
1/4 of that area. Assuming the rate of flow of the water in the hose remains the same.
What would you expect the velocity of the water to be as it flows past your thumb? -
ANSWER 8 ft/s
Which of the following would be considered by the USAF to be a valid reason for
designing a new aircraft? - ANSWER Air Mobility Command has a need which can best
be met by designing a new aircraft
Which of the following statements correctly describes one of the influences. World War I
had on aviation? - ANSWER The large number of trained pilots and inexpensive surplus
military aircraft available in the US after the war led to a vast expansion of aviation
activities, enterprises, and public awareness
If you were designing a helicopter to land on the top of Mount Everest, and you did some
research to find out what the atmospheric conditions were there, what step of the
Engineering Method would you be accomplishing? - ANSWER Collect Information
A supersonic jet fighter aircraft with an afterburning turbojet engine and guided missiles
as its only air-to-air weapons is likely from this generation of fighters. - ANSWER 5th
The best way to choose which conceptual design from several contenders that a
company should develop further in preliminary and detail design is: - ANSWER Use a
decision matrix
The sizing equation makes it clear that _________ wing loading and __________
thrust-to-weight ratio will produce the smallest, lightest aircraft that meets the mission
requirements? - ANSWER High, Low
You have sized your aircraft for a 300 nm mission radius and a 4,000-lb payload. For this
mission and design constraints, your sized wing area is 400 sq ft. Your customer
decides to increase the payload requirement to 6,000 lbs. What would you expect the
new sized wing area to be? - ANSWER 600 sq ft
You have chosen a design point wing loading of 100 pounds per square foot (psf) and a
thrust-to-weight ratio of 0.8. With this design point you calculate a mission fuel fraction
of 0.3. What value would you use in the sizing equation for mission fuel wing loading
portion? - ANSWER 30 psf
What are the four fundamental flow properties that define the condition of a fluid? -
ANSWER Temperature, Density, Velocity, and Pressure
When a gas is Perfect, or Ideal, what properties can be related in an equation? -
ANSWER Density, temperature, and pressure
You are flying in your supersonic personal bizjet at an altitude where the speed of sound
is 1,000 ft/s. If your true airspeed is 1,600 ft/s, what is your flight Mach number? -
ANSWER 1.6
, What is the significance of a Point Property? - ANSWER A point property can have a
different value at every point in a flowfield.
If you multiply pressure by area then you get what? - ANSWER Force
The standard atmosphere was built using these three relations: - ANSWER Perfect Gas,
the Hydrostatic Equation, and an empirical temperature profile
According to Figure 2.4, at what altitude is the Tropopause (separating the Troposphere
and Stratosphere.where the temperature stops decreasing with increasing altitude)? -
ANSWER 11 km
How does a standard altimeter work? - ANSWER It is a simple pressure gauge
calibrated in units of altitude instead of pressure
An aircraft's instruments measure an air temperature of 15 deg C and an air pressure of
83 kPa. What is the air density for these conditions? (Use Equation 2.1 which is the Aero
version of the Perfect Gas Law. Also, be sure to convert the temperature to absolute
temperature and convert kPa to Pascals = N/m2) - ANSWER 1.0 kg/m3
A manometer is filled with water. On the first side, the pressure is standard sea level
pressure (P1 = 101,325 Pa). The second side is open to the room. The fluid is 50 cm
higher on the second side than the first side. What is the pressure in the room? -
ANSWER Note: The density of water is 1,000 kg/m^3. Use Equation 2.3 and designate P2
as room pressure and h2 as the height of the water in the side of the manometer
connected to the room. Then, h2-h1 = 50 cm. Substitute into Equation 2.3 and solve for
the pressure in the room. Be careful with units! 96,425 Pa
- ANSWER
The Continuity Equation requires what two assumptions? - ANSWER Steady and
1-Dimensional
Euler's Equation requires what four assumptions? - ANSWER Body forces can be
ignored, steady, inviscid, and along a streamline
Why can we treat the walls of stream tubes as solid boundaries even though they are
just streamlines? - ANSWER Stream tube walls are streamlines and flow can't cross
streamlines because the velocity vectors are everywhere tangent to them.
In Figure 3.9 in your book, what can you say about the flow properties at points 2a and
2b (on top and bottom of the airfoil, respectively)? - ANSWER According to the
continuity equation, the velocity at 2a is faster than 2b
Water flows through a garden hose and exits at the nozzle at 2 ft/s. You place your
thumb over the end of the hose, reducing the area of the nozzle from 1 square inch to
1/4 of that area. Assuming the rate of flow of the water in the hose remains the same.
What would you expect the velocity of the water to be as it flows past your thumb? -
ANSWER 8 ft/s
