List of top Aerospace Engineering Questions asked in TS PGECET

A satellite is transferred from a circular orbit of radius \(r\) to a circular orbit of radius \(5r\). What is the time taken for the transfer in terms of the period (\(T_1\)) of the first orbit?
Phugoid oscillation of an aircraft is
The yawing moment coefficient per sideslip angle is positive. What does this indicate?
Stick-fixed condition is that
An airplane has its Neutral Point \(x_{NP}\) located at \(0.35c\) (35% of the Mean Aerodynamic Chord). The Current Center of Gravity (CG) \(x_{CG}\) is \(0.20c\) (20% of the Mean Aerodynamic Chord). The pilot wants to move the CG to a new position such that the Static Margin is reduced by exactly \(50\%\). Calculate the new location of CG?
The Free Elevator Factor (FEF) primarily indicates
Corner point in the \(V\)-\(n\) diagram is
In an aircraft, what is the condition for the absolute ceiling?
An aircraft has a minimum sink rate of \(1.5\ \text{m/s}\). If it starts gliding from an altitude of \(1800\) metres, what is its maximum endurance (loiter time) in minutes?
Crosswind primarily affects
An airplane with symmetric airfoil requires a lift coefficient \(0.52\). If the lift curve slope is \(0.1\) per degree and the angle of zero lift is \(0\), calculate the required angle of attack (in radians).
During a sideslip, the pilot applies
An aircraft has the drag polar \[ C_D=0.020+0.040C_L^2. \] What is the total drag coefficient when the aspect ratio is \(4\)?
How does an increase in density altitude (lower air density) affect the take-off ground roll distance (\(S_g\))?
For a jet airplane, the maximum rate of climb occurs at the speed where
An aircraft is gliding at an altitude of \(3000\) metres with the engine failed. The aircraft has a maximum Lift-to-Drag ratio \((L/D)_{\max\) of \(15\). Calculate the maximum horizontal distance the aircraft can cover before hitting the ground.
If a pilot fails to update the altimeter setting when flying from a high-pressure area to a low-pressure area, the aircraft altitude will be
Which of the following best defines Density Altitude?
Equivalent Air Speed (EAS) is
The "elevons" are primary control surfaces that combine the functions of the following two components?
If a rocket engine produces 30 kN thrust operating at chamber pressure of 4 MPa with throat diameter of 100 mm, then the thrust coefficient of a rocket engine is:
During rocket testing, the characteristic velocity of a choked nozzle with stagnation temperature of 2400 K is (\(\gamma = 1.3\), \(M = 28\ \text{kg/kmol}\))
A grain in which thrust, pressure and burning surface area increase with burn time is called as
The interval from 10% maximum initial pressure (or thrust) to web burnout, with web burnout usually taken as the aft tangent-bisector point on the pressure–time trace is called as
The period from the instant the igniter receives its signal until a portion of the grain surface burns and produces hot gases is called as