Specific Subsystems Section (FULL)

Select if the following statement is true or false. If the propulsion requirements exceed elements in the budget, then the propulsion designers should communicate those issues with the systems engineers as soon as possible. The same applies to any subsystem.

• True

• False

After determining the objectives of the propulsion system, what should engineers do next in the design process?

• Determine fuel tank size

• Determine functions

• Determine fuel type

Select if the following statement is true or false. Due to our understanding of orbit perturbations, it is possible to predict the required amount of ∆V and thrust required to maintain the desired orbit.

• True

• False

Which of the following best describes the process in order for the propulsion engineer to list out the options for propulsion systems in the fourth step of the design process?

• The first four steps allow for an estimate of how much ∆V, impulse, and thrust that is required for the lifetime of the spacecraft. This then allows the propulsion engineer to list out the options for propulsion systems.

• The first step allows for an estimate of how much ∆V, impulse, and thrust that is required for the lifetime of the spacecraft. This then allows the propulsion engineer to list out the options for propulsion systems.

• The second step allows for an estimate of how much ∆V, impulse, and thrust that is required for the lifetime of the spacecraft. This then allows the propulsion engineer to list out the options for propulsion systems.

Which of the following is not a rocket propulsion system currently in use?

• Chemical propulsion

• Reaction Engines

• Internal combustion gasoline engines

• Nano electrokinetic thruster

The sixth step in propulsion system design is to list out the options and conduct a thorough analysis to determine the key parameters of each option, either quantitatively, qualitatively, or both. What is a parameter that should be considered during this step?

• Fuel reusability

• Manufacturability

• Launch location

Based on what you have learned so far about the design process, which of the following statements is true in regards to the last step of this propulsion system design process?

• The final step is to conduct a trade study after a propulsion system is chosen. Most importantly, iterate the process if necessary. It is very likely that certain elements will exceed the planned budget for another subsystem.

• The final step is to conduct a fuel burn if necessary. It is very likely that certain elements will exceed the planned budget for another subsystem.

RS232, I2C, SPI, and Spacewire are all examples of what?

• Types of payload software

• Data interfaces

• Microprocessors

• Watchdog timers

Which of the following is not a function of the ECLSS subsystem?

• Provides breathable air and potable water for space travelers

• Provides hygiene and waste management for space travelers

• Provides space travelers protection from radiation and space debris

• Provides a backup propulsion unit in case of emergency

What is the purpose of the spacecraft propulsion subsystem?

• Changing the spacecraft orbit

• Counteracting orbital perturbations

• Augmenting the attitude determination and control subsystem as necessary

• All of the above