Question

When the axes of first and last gear are co-axial, then gear train is known as

(a) simple gear train

(b) compound gear train

(c) reverted gear train

(d) epicyclic gear train

The question was asked in an international level competition.

The origin of the question is Gear Trains topic in division Toothed Gearing & Gear Trains of Machine Kinematics

Answer 1

The correct choice is (c) reverted gear train

For explanation I would say: When the axes of the first gear (i.e. first driver) and the last gear (i.e. last driven or follower) are co-axial, then the gear train is known as reverted gear train.

                    When there are more than one gear on a shaft, as shown in Fig. 13.2, it is called a compound train.