Q4.In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated
carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the
depth of cut is 2 mm. The chip thickness obtained is 0.48 mm. If the orthogonal
rake angle is zero and the principle cutting edge angle is 90o, the shear angle in
degree is
Answer : Option BExplaination / Solution: No Explaination.
Q6.Volume of a cube of side ‘l’ and volume of a sphere of radius ‘r’ are equal. Both
the cube and the sphere are solid and of same material. They are being cast. The
ratio of the solidification time of the cube to the same of the sphere is
Answer : Option DExplaination / Solution: No Explaination.
Q7.Which of the following relationships is valid only for reversible processes undergone
by a closed system of simple compressible substance (neglect changes in kinetic
and potential energy?)
Answer : Option DExplaination / Solution: No Explaination.
Q8.Water has a critical specific volume of 0.003155 / m3 kg. A closed and rigid steel
tank of volume 0.025 m3 contains a mixture of water and steam at 0.1MPa. The
mass of the mixture is 10 kg. The tank is now slowly heated. The liquid level
inside the tank
Answer : Option AExplaination / Solution: No Explaination.
Q9.Consider an incompressible laminar boundary layer flow over a flat plate of length L, aligned with the direction of an incoming uniform free stream. If F is the ratio of the drag force on the front half of the plate to the drag force on the rear half,
then
Answer : Option DExplaination / Solution: No Explaination.
Q10.In a steady flow through a nozzle, the flow velocity on the nozzle axis is given
by v = u0(1 + 3x/L), where
x is the distance along the axis of the nozzle from its
inlet plane and
L is the length of the nozzle. The time required for a fluid particle
on the axis to travel from the inlet to the exit plane of the nozzle is
Answer : Option BExplaination / Solution: No Explaination.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0