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 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

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. Figure shows a quick return mechanism. The crank OA rotates clockwise uniformly. OA = 2 cm, OO' = 4 cm. The ratio of time for forward motion to that for return motion is

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. An offset slider-crank mechanism is shown in the figure at an instant. Conventionally, the Quick Return Ratio (QRR) is considered to be greater than one. The value of QRR is