Which of the following statement is correct? Options: A . &nbspFor 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 centers of rotation of gears. B . &nbspFor involute gears, the pressure angle changes with the change in center distance between gears. C . &nbspThe epicyclic gear trains involve rotation of at least one gear axis about some other gear axis. D . &nbspAll of the above

Which of the following statement is correct?

Question

Which of the following statement is correct?

Options:

A . 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 centers of rotation of gears.

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

C . The epicyclic gear trains involve rotation of at least one gear axis about some other gear axis.

D . All of the above

Answer: Option D

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