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Spacecraft Trajectories

This quiz tests your knowledge on the subject of Spacecraft Trajectories.

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

What is the primary objective of spacecraft trajectory design?

  1. To minimize fuel consumption
  2. To maximize mission duration
  3. To achieve a desired orbit or trajectory
  4. To minimize time of flight
Question 2 Multiple Choice (Single Answer)

What is the Hohmann transfer orbit?

  1. An elliptical orbit used to transfer between two circular orbits
  2. A circular orbit used to transfer between two elliptical orbits
  3. An elliptical orbit used to transfer between two hyperbolic orbits
  4. A hyperbolic orbit used to transfer between two circular orbits
Question 3 Multiple Choice (Single Answer)

What is the purpose of a gravity assist maneuver?

  1. To increase the spacecraft's velocity
  2. To decrease the spacecraft's velocity
  3. To change the spacecraft's direction of travel
  4. To all of the above
Question 4 Multiple Choice (Single Answer)

What is the difference between a geocentric transfer orbit and a heliocentric transfer orbit?

  1. A geocentric transfer orbit is used to transfer between two Earth orbits, while a heliocentric transfer orbit is used to transfer between two orbits around the Sun.
  2. A geocentric transfer orbit is used to transfer between two orbits around the Sun, while a heliocentric transfer orbit is used to transfer between two Earth orbits.
  3. A geocentric transfer orbit is used to transfer between two orbits around the Moon, while a heliocentric transfer orbit is used to transfer between two orbits around the Sun.
  4. A geocentric transfer orbit is used to transfer between two orbits around the Sun, while a heliocentric transfer orbit is used to transfer between two orbits around the Moon.
Question 5 Multiple Choice (Single Answer)

What is the Lambert's problem?

  1. A method for determining the trajectory of a spacecraft given its initial and final conditions
  2. A method for determining the fuel consumption of a spacecraft given its trajectory
  3. A method for determining the time of flight of a spacecraft given its trajectory
  4. A method for determining the orbit of a spacecraft given its trajectory
Question 6 Multiple Choice (Single Answer)

What is the patched conic approximation?

  1. A method for approximating the trajectory of a spacecraft by dividing it into a series of conic sections
  2. A method for approximating the fuel consumption of a spacecraft by dividing its trajectory into a series of conic sections
  3. A method for approximating the time of flight of a spacecraft by dividing its trajectory into a series of conic sections
  4. A method for approximating the orbit of a spacecraft by dividing its trajectory into a series of conic sections
Question 7 Multiple Choice (Single Answer)

What is the difference between a ballistic trajectory and a powered trajectory?

  1. A ballistic trajectory is a trajectory in which the spacecraft is not under thrust, while a powered trajectory is a trajectory in which the spacecraft is under thrust.
  2. A ballistic trajectory is a trajectory in which the spacecraft is under thrust, while a powered trajectory is a trajectory in which the spacecraft is not under thrust.
  3. A ballistic trajectory is a trajectory in which the spacecraft is in orbit, while a powered trajectory is a trajectory in which the spacecraft is not in orbit.
  4. A ballistic trajectory is a trajectory in which the spacecraft is not in orbit, while a powered trajectory is a trajectory in which the spacecraft is in orbit.
Question 8 Multiple Choice (Single Answer)

What is the Tsiolkovsky rocket equation?

  1. $Delta v = V_e * ln(m_0/m_f)$
  2. $Delta v = V_e * ln(m_f/m_0)$
  3. $Delta v = V_e * (m_0/m_f)$
  4. $Delta v = V_e * (m_f/m_0)$
Question 9 Multiple Choice (Single Answer)

What is the Oberth effect?

  1. The increase in the specific energy of a spacecraft due to a burn at high velocity
  2. The increase in the specific energy of a spacecraft due to a burn at low velocity
  3. The decrease in the specific energy of a spacecraft due to a burn at high velocity
  4. The decrease in the specific energy of a spacecraft due to a burn at low velocity
Question 10 Multiple Choice (Single Answer)

What is the difference between a Hohmann transfer orbit and a bi-elliptic transfer orbit?

  1. A Hohmann transfer orbit is a single elliptical orbit, while a bi-elliptic transfer orbit is a combination of two elliptical orbits.
  2. A Hohmann transfer orbit is a combination of two elliptical orbits, while a bi-elliptic transfer orbit is a single elliptical orbit.
  3. A Hohmann transfer orbit is used to transfer between two circular orbits, while a bi-elliptic transfer orbit is used to transfer between two elliptical orbits.
  4. A Hohmann transfer orbit is used to transfer between two elliptical orbits, while a bi-elliptic transfer orbit is used to transfer between two circular orbits.
Question 11 Multiple Choice (Single Answer)

What is the purpose of a phasing maneuver?

  1. To adjust the spacecraft's position in its orbit
  2. To adjust the spacecraft's velocity in its orbit
  3. To adjust the spacecraft's inclination in its orbit
  4. To all of the above
Question 12 Multiple Choice (Single Answer)

What is the difference between a rendezvous and a docking?

  1. A rendezvous is when two spacecraft come close to each other, while a docking is when two spacecraft physically connect to each other.
  2. A rendezvous is when two spacecraft physically connect to each other, while a docking is when two spacecraft come close to each other.
  3. A rendezvous is when two spacecraft come close to each other in orbit, while a docking is when two spacecraft come close to each other on the surface of a planet or moon.
  4. A rendezvous is when two spacecraft come close to each other on the surface of a planet or moon, while a docking is when two spacecraft come close to each other in orbit.
Question 13 Multiple Choice (Single Answer)

What is the purpose of a deorbit burn?

  1. To reduce the spacecraft's velocity in order to enter a lower orbit
  2. To increase the spacecraft's velocity in order to enter a higher orbit
  3. To change the spacecraft's inclination
  4. To change the spacecraft's argument of perigee
Question 14 Multiple Choice (Single Answer)

What is the purpose of a plane change maneuver?

  1. To change the spacecraft's inclination
  2. To change the spacecraft's argument of perigee
  3. To change the spacecraft's longitude of ascending node
  4. To change the spacecraft's true anomaly
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