In Whitworth quick return mechanism (used in shapers) the velocity of the ram is maximum at

Q. The quick return mechanism used in the shaper has rocker arm drive of length $200mm$. If the crank radius is $50mm$ and the offset between crank centre and rocker arm pivot is $20mm$, length of the stroke (in meters) is

Q. In the crank and slotted lever type quick return mechanism, if the length of the fixed link AB is 50 cm and that of the crank BC is 20 cm, the quick return ratio is

Q. A quick return mechanism is shown below. The crank OS is driven at 2 rev/s in counter clockwise direction.


If the quick return ratio is 1: 2, then the length of the crank in mm is

Q. The angular speed PQ in rev/s when the block R attains maximum speed during forward stroke (stroke with slower speed) is (in rad/s)

Q. A simple quick return mechanism is shown in the figure. The forward to return ratio of the quick return mechanism is 2 : 1. If the radius of the crank $O_{1}P$ is 125 mm, then the distance d (in mm) between the crank centre to lever pivot centre point should be