none of the links is fixed

one of the links is fixed

two of the links are fixed

none of these

1/24

1/8

4/15

12

crank has uniform angular velocity

crank has non-uniform angular velocity

crank has uniform angular accleration

crank has non-uniform angular acceleration

addendum circle

dedendum circle

pitch circle

clearance circle

For constant velocity ratio transmission between two gears, the common normal at the point of contact must always pass through a fixed point on the line joining the centres of rotation of gears.

For involute gears, the pressure angle changes with the change in centre distance between gears.

The epicyclic gear trains involve rotation of atleast one gear axis about some other gear axis.

all of the above