## Theory of Machine Which one of the following can completely balance several masses revolving in different planes on a shaft?

Two equal masses in any two planes
A single mass in different planes
A single mass in one of the planes of the revolving masses
Two masses in any two planes

μ₁ = μ cos β
μ₁ = μ/cos β
μ₁ = μ/sin β
μ₁ = μ sin β

## Theory of Machine The maximum fluctuation of energy is the

Variations of energy above and below the mean resisting torque line
Ratio of the mean resisting torque to the work-done per cycle
Difference between the maximum and minimum energies
Sum of the maximum and minimum energies

## Theory of Machine In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.

Equal to
Independent of
Directly proportional to
Inversely proportional to

## Theory of Machine Which of the following mechanisms produces mathematically an exact straight line motion?

Grasshopper mechanism
Peaucellier's mechanism
Tchebicheff mechanism
Watt mechanism

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