A 0.5 kg weight attached to a light spring elongates it 0.6 mm. The natural frequency of the system should be approximately
A.6 Hz
B.16 Hz
C.26 Hz
D.32 Hz
E.36 Hz
Category: Theory of Machines Mcqs
In a kinematic chain the minimum number of kinematic pairs required is
A.One
B.Two
C.Three
D.Four
E.Five
In case of cross-helical worm the axes of two shafts are
A.Parallel
B.Non-parallel
C.Intersecting
D.Non-intersecting
E.Non-parallel-non intersecting
Dynamically unbalanced masses in rotating machines cause
A.Noise
B.Friction
C.Wear
D.Vibrations
E.All of the above
Which of the following is not a positive drive?
A.Rope drive
B.Flat belt drive
C.V-belt drive
D.All of the above
E.None of the above
Velocity of sliding between two mating gear surfaces can be defined as
A.Sum of their angular velocities x distance between pitch point and point of contact.
B.Sum of their angular velocities x distance between their centres of rotation.
C.Sum of their angular velocities x difference between their pitch circle diameters
D.None of these
The vibrations in which the restoring forces are not proportional to the displacements and the first power of velocity are known as
A.Torsional vibrations
B.Bearing vibrations
C.Under damped vibrations
D.Over damped vibrations
E.Non-linear vibrations
The no of links in Hart mechanism is
A.8
B.6
C.5
D.4
Which one of the following is not a spring controlled governor?
A.Porter governor
B.Hartnell governor
C.Pickering governor
D.None of the above
Coriolis component is encountered in
A.Slider crank mechanism
B.Four bar chain mechanism
C.Quich return mechanism
D.(A) and (B) above
E.(A) and (C) above
