The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

A. 90° and 180°

B. 45° and 225°

C. 180° and 270°

D. 270° and 360°

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

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  1. Which of the following statement is wrong?
  2. Which of the following is an example of a higher pair?
  3. For the brake to be self locking, the force P at C shown in the below figure, should
  4. In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be
  5. The ratio of maximum fluctuation of speed to the mean speed is called
  6. A cam mechanism imparts following motion
  7. When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in…
  8. The driving and driven shafts connected by a Hooke's joint will have equal speeds, if
  9. The maximum efficiency of a screw jack is
  10. The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because
  11. There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20,…
  12. In higher pair, the relative motion is
  13. In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance…
  14. The lower pairs are __________ pairs.
  15. The critical speed of a shaft in revolution per second is __________ as that of natural frequency of…
  16. It is required to connect two parallel shafts, the distance between whose axes is small and variable.…
  17. The mechanism in which two are turning pairs and two are sliding pairs, is called a
  18. Which of the following is a higher pair?
  19. In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient…
  20. One end of a helical spring is fixed while the other end carries the load W which moves with simple…
  21. Bifilar suspension method is used to find the
  22. Sensitiveness of the governor is defined as the ratio of the
  23. In a pantograph, all the pairs are
  24. Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open…
  25. The amplitude of vibration is always __________ the radius of the circle.
  26. The static friction
  27. Which of the following is used to control the speed variations of the engine caused by the fluctuations…
  28. The size of a gear is usually specified by
  29. The periodic time of a compound pendulum is __________ when the distance between the point of suspension…
  30. Which of the following statement is correct as regard to the difference between a machine and a structure?