Aerospace Engineering Gate 2012 Questions with Answer

Ques 40 GATE 2012

In an aircraft, elevator control effectiveness determines

Ques 41 GATE 2012

A wing and tail are geometrically similar, while tail area is one-third of the wing area and distance between two aerodynamic centres is equal to wing semi-span (b/2). In addition, following data is applicable: ε_a = 0.3, C_L = 1.0, C_Lα = 0.08/deg., ¯c = 2.5 m, b = 30 m, C_Mα = 0, η_t = 1. The symbols have their usual aerodynamic interpretation.
The maximum distance that the centre of gravity can be behind aerodynamic centre without destabilizing the wing-tail combination is

Ques 42 GATE 2012

A wing and tail are geometrically similar, while tail area is one-third of the wing area and distance between two aerodynamic centres is equal to wing semi-span (b/2). In addition, following data is applicable: ε_a = 0.3, C_L = 1.0, C_Lα = 0.08/deg., ¯c = 2.5 m, b = 30 m, C_Mα = 0, η_t = 1.
The angle of incidence of tail to trim the wing-tail combination for a 5% static margin is

Ques 43 GATE 2012

An aircraft in trimmed condition has zero pitching moment at

Ques 44 GATE 2012

An aircraft has a steady rate of climb of 300 m/s at sea level and 150 m/s at 2500 m altitude. The time taken (in sec) for this aircraft to climb from 500 m altitude to 3000 m altitude is

Ques 45 GATE 2012

If an aircraft takes off with 10% less fuel in comparison to its standard configuration, its range is

Ques 46 GATE 2012

An aircraft has an approach speed of 144 kmph with a descent angle of 6.6°. If the aircraft load factor is 1.2 and constant deceleration at touch down is 0.25g (g=9.81 m/s²), its total landing distance approximately over a 15 m high obstacle is

Ques 47 GATE 2012

An aircraft is trimmed straight and level at true air speed (TAS) of 100 m/s at standard sea level (SSL). Further, pull of 5 N holds the speed at 90 m/s without re-trimming at SSL (air density =1.22 kg/m³). To fly at 3000 m altitude (air density =0.91 kg/m³) and 120 m/s TAS without re-trimming, the aircraft needs

Ques 48 GATE 2012

During the ground roll manoeuvre of an aircraft, the force(s) acting on it parallel to the direction of motion

Ques 49 GATE 2012

An aircraft in a steady climb suddenly experiences a 10% drop in thrust. After a new equilibrium is reached at the same speed, the new rate of climb is

Ques 50 GATE 2012

Air at a stagnation temperature of 15oC and stagnation pressure 100 kPa enters an axial compressor with an absolute velocity of 120 m/s. Inlet guide vanes direct this absolute velocity to the rotor inlet at an angle of 18o to the axial direction. The rotor turning angle is 27o and the mean blade speed is 200 m/s. The axial velocity is assumed constant through the stage.
The ninth and the tenth of this month are Monday and Tuesday

Ques 51 GATE 2012

A rocket is to be launched from the bottom of a very deep crater on Mars for earth return. The specific impulse of the rocket, measured in seconds, is to be normalized by the acceleration due to gravity at

Ques 52 GATE 2012

The propellant in a single stage sounding rocket occupies 60% of its initial mass. If all of it is expended instantaneously at an equivalent exhaust velocity of 3000 m/s. what would be the altitude attained by the payload when launched vertically? [Neglect drag and assume acceleration due to gravity to be constant at 9.81 m/s².]