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Which of the following mechanism is an approximate straight line motion mechanism?

A. Watt's mechanism

B. Grasshopper mechanism

C. Robert's mechanism

D. All of these

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)
  2. The velocity of sliding __________ the distance of the point of contact from the pitch point.
  3. The unbalanced primary forces in a reciprocating engine are
  4. The maximum or minimum value of the swaying couple is
  5. The Klein's diagram is useful to find
  6. The static friction
  7. The Kutzbach criterion for determining the number of degrees of freedom (n) is (where l = number of…
  8. The condition for correct steering of a Davis steering gear is (where α = Angle of inclination…
  9. The minimum number of teeth on the pinion which will mesh with any gear without interference for 20°…
  10. The number of links in pantograph mechanism is equal to
  11. The partial balancing of reciprocating parts in locomotives produces
  12. A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located…
  13. The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled…
  14. The two parallel and coplanar shafts are connected by gears having teeth parallel to the axis of the…
  15. ________ is an inversion of Double slider crank chain.
  16. Flexible coupling is used because
  17. Which of the following is an inversion of a single slider crank chain?
  18. The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing…
  19. The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²)…
  20. A combination of kinematic pairs, joined in such a way that the relative motion between the links is…
  21. The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called
  22. The critical speed of a shaft in revolution per second is __________ as that of natural frequency of…
  23. When two links are connected by a pin joint, their instantaneous centre lies
  24. The motion between a pair when limited to a definite direction, irrespective of the direction of force…
  25. The minimum force required to slide a body of weight W on a rough horizontal plane is
  26. The size of cam depends upon
  27. The example of completely constrained motion is a
  28. In an ideal machine, the output as compared to input is
  29. The flank of the tooth is the surface of the tooth __________ the pitch surface.
  30. In an open pair, the two elements of a pair