BE/B Eng Bachelor of Engineering Bachelor of Aerospace Engineering 2

Question 1

Which boundary layer transition phenomenon is most critical for hypersonic vehicle design?

Accepted Answer

Shock-boundary layer interaction

Answer

Laminar-to-turbulent transition

Answer

Flow separation at leading edge

Answer

Boundary layer reattachment

Question 2

In orbit determination, what is the primary purpose of the state transition matrix?

Accepted Answer

To propagate the covariance matrix forward in time

Answer

To convert between coordinate frames

Answer

To compute gravitational perturbations

Answer

To transform velocity to orbital elements

Question 3

What does the Knudsen number indicate in gas dynamics?

Accepted Answer

Ratio of mean free path to characteristic length

Answer

Ratio of inertial to viscous forces

Answer

Ratio of thermal to kinetic energy

Answer

Ratio of compressibility to viscosity

Question 4

Which rocket engine cycle achieves the highest theoretical specific impulse among conventional chemical propulsion systems?

Accepted Answer

Staged combustion cycle

Answer

Gas generator cycle

Answer

Expander cycle

Answer

Pressure-fed cycle

Question 5

In composite laminate design, what is the purpose of a quasi-isotropic layup?

Accepted Answer

To achieve equal stiffness in all in-plane directions

Answer

To maximize strength in one direction

Answer

To minimize interlaminar shear stress

Answer

To reduce manufacturing complexity

Question 6

What is the significance of the L/D ratio in gliding flight performance?

Accepted Answer

It determines the maximum glide range for a given altitude

Answer

It equals the glide angle in degrees

Answer

It sets the stall speed of the aircraft

Answer

It controls the rate of turn in banked flight

Question 7

Which astrodynamics concept describes the transfer between two circular orbits using the minimum total delta-V?

Accepted Answer

Hohmann transfer

Answer

Patched conic approximation

Answer

Bi-elliptic transfer

Answer

Gravity assist maneuver