Bachelor of Aerospace Engineering Flashcards
7 cards from real BE/B Eng Bachelor of Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Bachelor of Aerospace Engineering flashcards as text
Which boundary layer transition phenomenon is most critical for hypersonic vehicle design?
Answer: Shock-boundary layer interaction
Shock-boundary layer interaction at hypersonic speeds causes extreme local heating and pressure fluctuations that dominate vehicle design constraints.
In orbit determination, what is the primary purpose of the state transition matrix?
Answer: To propagate the covariance matrix forward in time
The state transition matrix maps how uncertainties in the initial state propagate over time, enabling Kalman filter covariance updates.
What does the Knudsen number indicate in gas dynamics?
Answer: Ratio of mean free path to characteristic length
The Knudsen number (Kn = λ/L) determines whether continuum fluid mechanics applies or whether rarefied gas dynamics must be used.
Which rocket engine cycle achieves the highest theoretical specific impulse among conventional chemical propulsion systems?
Answer: Staged combustion cycle
The staged combustion (full-flow) cycle burns all propellant in the main chamber and uses preburner exhaust to drive turbopumps, maximizing efficiency.
In composite laminate design, what is the purpose of a quasi-isotropic layup?
Answer: To achieve equal stiffness in all in-plane directions
A quasi-isotropic layup (e.g., [0/±45/90]s) distributes fiber orientations so the laminate has uniform in-plane stiffness regardless of loading direction.
What is the significance of the L/D ratio in gliding flight performance?
Answer: It determines the maximum glide range for a given altitude
The maximum L/D ratio directly equals the maximum range-to-altitude ratio in a glide, so a higher L/D means the aircraft travels farther per unit altitude lost.
Which astrodynamics concept describes the transfer between two circular orbits using the minimum total delta-V?
Answer: Hohmann transfer
The Hohmann transfer uses two engine burns at opposite ends of an elliptical transfer orbit and is delta-V optimal for most orbit-raising scenarios.