GATE 2017-2018 :: GATE Aeronautical Engineering
- The ideal static pressure coefficient of a diffuser with an area ratio of 2.0 is
- 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
- In a semi-monocoque construction of an aircraft wing, the skin and spar webs are the primary carriers of
- The logarithmic decrement measured for a viscously damped single degree of freedom system is 0.125. The value of the damping factor in % is closest to
- 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 ____.
- An airfoil generates a lift of 80 N when operating in a freestream flow of 60 m/s. If the ambient pressure and temperature are 100 kPa and 290 K respectively (specific gas constant is 287 J/kg-K), the circulation on the airfoil in m2/s is ____.
- A rocket motor has combustion chamber temperature of 2600 K and the products have molecular weight of 25 g/mol and ratio of specific heats 1.2. The universal gas constant is 8314 J/kg-mole-K. The value of theoretical c* (in m/s) is ____.
- The mode shapes of an un-damped two degrees of freedom system are {1 0.5 } T and {1 -0.675 } T . The corresponding natural frequencies are 0.45 Hz and 1.2471 Hz. The maximum amplitude (in mm) of vibration of the first degree of freedom due to an initial displacement of {2 1}T (in mm) and zero initial velocities is ____.
- The nth derivative of the function y = 1/(x + 3) is
- The volume of a solid generated by rotating the region between semi-circle y = 1 − √1− x2 and straight line y = 1, about x axis, is
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