Topic: Theory of Machines
Which of the following is FALSE?
- A. A reverted gear train is one in which the first and last gears are on the same axis.
- B. Train value for a gear is the ratio of product of driven tooth numbers to product of driving tooth numbers.
- C. A planetary gear train is one in which the axes of some of the gears may have a motion.
- D. A compound gear train is one which has two or more gears on each axis.
Answer: B. Train value for a gear is the ratio of product of driven tooth numbers to product of driving tooth numbers.
Explanation: Train value is the reciprocal of the speed ratio. It is defined as the ratio of the product of driving tooth numbers to the product of driven tooth numbers.