List of top Aerospace Engineering Questions

On a principal plane, the relationship between the stress components is such that

A cylindrical alloy rod is subjected to a tensile force such that its length increases by \(4\%\) from its original length. During this deformation, the diameter of the rod is observed to decrease by \(1\%\). What is the Poisson's ratio of the alloy?

A point in a structural member is subjected to a plane stress state where \(\sigma_x=80\ \text{MPa}\), \(\sigma_y=20\ \text{MPa}\), and \(\tau_{xy}=40\ \text{MPa}\). What is the maximum principal stress?

An element is subjected to a pure shear stress of magnitude \(\tau\). Which of the following statement is incorrect regarding the Mohr's Circle for this stress state?

The sum of normal stresses on any two mutually perpendicular planes is

During a rocket launch from Sea Level to Space, a fixed-geometry nozzle that is over-expanded at the launch pad will eventually become

In a subsonic jet engine, what is the primary thermodynamic purpose of the diffuser located after the compressor?

In Rayleigh flow, what happens to the stagnation pressure when heat is added, regardless of whether the flow is subsonic or supersonic?

Air \((\gamma=1.4)\) flows isentropically through a convergent-divergent nozzle. At a certain section, the Mach number is \(1.0\) (at the throat). If the stagnation temperature is \(720\ \text{K}\), find the static temperature at the throat.

A steel bar is held between two rigid fixed supports. If the temperature of the bar is increased by \(100^\circ\text{C}\), what is the magnitude of the thermal stress induced in the bar? (Coefficient of thermal expansion is \(11\times10^{-6}/^\circ\text{C}\) and Young's modulus of elasticity is \(210\ \text{GPa}\))

In a diffuser, the primary purpose is to

An aircraft is flying at an altitude where the ambient pressure is \(0.9\ \text{kPa}\) and the density is \(1226\ \text{kg/m}^3\). Calculate the velocity of sound when adiabatic index is \(1.226\).

If a supersonic flow (\(M=2.0\)) encounters a convex corner (expansion), what happens to the stagnation pressure?

If the critical speed of sound is \(300\ \text{m/s}\), upstream velocity across the normal shock wave is \(600\ \text{m/s}\), the downstream velocity is

Fanno flow is characterized by

Find the isentropic compressibility of an ideal gas with an adiabatic index of \(1.4\) at a pressure of \(1\) atm.

The aerodynamic centre of an aerofoil is defined as the point

If an aircraft is flying at its Drag Divergence Mach Number and the pilot increases speed slightly, what happens to the fuel consumption?

A horse-shoe vortex is primarily associated with

Critical Mach number of the airfoil is

If the Aspect Ratio of a wing is doubled, what will happen to the Induced Drag Coefficient, assuming the lift coefficient and efficiency factor remain constant?

For any thin airfoil (symmetrical or cambered), the rate at which lift increases with the angle of attack is

As per Kutta--Joukowski Theorem, lift per unit span is directly proportional to

Primary purpose of trim tab is to

Magnus effect deals with