+1 vote
in Machine Kinematics by (38.0k points)
A fixed gear having 100 teeth meshes with another gear having 25 teeth, the centre lines of both the gears being joined by an arm so as to form an epicyclic gear train. The number of rotations made by the smaller gear for one rotation of the arm is

(a) 3

(b) 4

(c) 5

(d) 6

The question was asked by my school principal while I was bunking the class.

The query is from Contact Ratio in portion Toothed Gearing & Gear Trains of Machine Kinematics

1 Answer

0 votes
by (106k points)
Right option is (c) 5

Best explanation: Revolution of 25 teeth gear = 1 + T100/T25

                                         = 1 + 100/25 =5.

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