Theory of Machine
Sense of tangential acceleration of a link

Is opposite to that of velocity
Is same as that of velocity
Could be either same or opposite to velocity
Is perpendicular to that of velocity

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Two heavy rotating masses are connected by shafts of lengths l₁, l₂ and l₃ and the corresponding diameters are d₁, d₂ and d₃. This system is reduced to a torsionally equivalent system having uniform diameter d = d₁ of the shaft. The equivalent length of the shaft is

l = l₁ + l₂.(d₁/d₂)³ + l₂.(d₁/d₃)³
l₁ + l₂ + l₃
(l₁ + l₂ + l₃)/3
l = l₁ + l₂.(d₁/d₂)⁴ + l₃.(d₁/d₃)⁴

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done

Because of loose contact of follower with cam surface
In order to have acceleration in beginning and retardation at the end of stroke within the finite limits
Because the uniform velocity motion is a partial parabolic motion
Because of difficulty in manufacturing cam profile

ANSWER DOWNLOAD EXAMIANS APP