GATE 2017-2018 :: GATE Aeronautical Engineering
- A spring-mass system is viscously damped with a viscous damping constant c. The energy dissipated per cycle when the system is undergoing a harmonic vibration X Cosωdt is given by
- Buckling of the fuselage skin can be delayed by
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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: ∈α = 0.3, CL = 1.0, CLα 0.08/ deg., c = 2.5 , b = 30m , CMac = 0, ηt = 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
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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: ∈α = 0.3, CL = 1.0, CLα 0.08/ deg., c = 2.5 , b = 30m , CMac = 0, ηt = 1. The symbols have their usual aerodynamic interpretation. The angle of incidence of tail to trim the wing-tail combination for a 5% static margin is
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A thin long circular pipe of 10 mm diameter has porous walls and spins at 60 rpm about its own axis. Fluid is pumped out of the pipe such that it emerges radially relative to the pipe surface at a velocity of 1 m/s. [Neglect the effect of gravity.] What is the radial component of the fluid's velocity at a radial location 0.5 m from the pipe axis?
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A thin-walled spherical vessel (1 m inner diameter and 10 mm wall thickness) is made of a material with |σY| = 500MPa in both tension and compression. The internal pressure pY at yield, based on the von Mises yield criterion, if the vessel is floating in space, is approximately
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A thin-walled spherical vessel (1 m inner diameter and 10 mm wall thickness) is made of a material with |σY| = 500MPa in both tension and compression. If the vessel is evacuated (internal pressure = 0) and subjected to external pressure, yielding according to the von Mises yield criterion (assuming elastic stability until yield)
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Choose the most appropriate alternative from the options given below to complete the following sentence: I ___ to have bought a diamond ring.
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Choose the most appropriate alternative from the options given below to complete the following sentence: Food prices ___ again this month.
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Choose the most appropriate alternative from the options given below to complete the following sentence: The administrators went on to implement yet another unreasonable measure, arguing that the measures were already ___ and one more would hardly make a difference.
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