11. It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by
12. A shaft carrying two rotors at its ends will have
13. In under damped vibrating system, the amplitude of vibration
14. Kinematic pairs are those which have two elements that
15. In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called
16. When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to
17. A simple spring-mass vibrating system has a natural frequency of $${{\text{f}}_{\text{n}}}.$$ If the spring stiffness is halved and the mass is doubled, then the natural frequency will become
18. Which of the following is a pendulum type governor?
19. The secondary unbalanced force is __________ the primary unbalanced force.
20. The transmissibility, for all values of damping factor, will be less than unity, if $$\frac{\omega }{{\omega {\text{n}}}}$$ is
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