In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is


B. 90°

C. 180°

D. 270°

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  1. In S.H.M., acceleration is proportional to
  2. The inversion of a mechanism is
  3. For fluctuating loads, well suited bearing is
  4. When the crank is at the inner dead centre, in a reciprocating steam engine, then the acceleration of…
  5. The cam follower generally used in aircraft engines is
  6. The sense of coriolis component 2 ωv is same as that of the relative velocity vector v rotated…
  7. Which of the following is a lower pair?
  8. Creep in belt drive is due to
  9. When the sleeve of a Porter governor moves upwards, the governor speed
  10. When the two elements of a pair have __________ when in motion, it is said to a lower pair.
  11. Sense of tangential acceleration of a link
  12. Open pairs are those which have
  13. The power of a Porter governor is equal to
  14. The secondary unbalanced force is maximum __________ in one revolution of the crank.
  15. The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel,…
  16. The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt)…
  17. The two elements of a pair are said to form a _________ when they permit relative motion between them.
  18. A system in dynamic balance implies that
  19. In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing…
  20. The motion of a shaft in a circular hole is an example of
  21. With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel…
  22. The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
  23. A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut…
  24. Elements of pairs held together mechanically is known as
  25. In railway axle boxes, the bearing used is
  26. The frictional torque transmitted by a disc or plate clutch is same as that of
  27. In a screw jack, the effort required to lower the load W is given by
  28. A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located…
  29. In a multiple V-belt drive, if one of the belts is broken, then we should replace
  30. One end of a helical spring is fixed while the other end carries the load W which moves with simple…