Kindly provide me the GATE Mechanical Engg. last years question papers with solutions……….

Here I am sharing the GATE Mechanical Engg. last years question papers with solution:

Q.21 A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a
flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is
(A) 395 (B) 790
(C) 1580 (D) 3160

Q.30 An incompressible fluid flows over a flat plate with zero pressure gradient. The boundary layer
thickness is 1 mm at a location where the Reynolds number is 1000. If the velocity of the fluid
alone is increased by a factor of 4, then the boundary layer thickness at the same location, in mm
will be
(A) 4 (B) 2 (C) 0.5 (D) 0.25

Q.31 A room contains 35 kg of dry air and 0.5 kg of water vapor. The total pressure and temperature of
air in the room are 100 kPa and 25°C respectively. Given that the saturation pressure for water at
25°C is 3.17 kPa, the relative humidity of the air in the room is
(A) 67% (B) 55% (C) 83% (D) 71%

Attached Files

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