+1 vote
in Machine Dynamics by (34.3k points)
Which of the following statement is true regarding epicyclic train dynamometer.

(a) Spur gear rotates in clockwise direction

(b) Annular gear rotates in clockwise direction

(c) Spur gear rotates is meshes with both annular and pinion

(d) Annular gear rotates in anticlockwise direction

This question was posed to me in a national level competition.

The origin of the question is Epicyclic-train Dynamometers in portion Brakes and Dynamometers of Machine Dynamics

1 Answer

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by (38.6k points)
Right choice is (b) Annular gear rotates in clockwise direction

Explanation: The spur gear is keyed to the driving shaft and rotates in anticlockwise direction. The annular gear rotates in clockwise direction and is keyed to the engine shaft.

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