Formula for maximum efficiency of worm gear - Theory of Machines - 2

Q.  Which formula is used to calculate maximum efficiency of worm gear?
- Published on 06 Aug 15

a. tan δ / tan ( δ + Φ)
b. (1 – sin Φ) / ( 1 + sin Φ)
c. tan ( δ + Φ) / tan δ
d. (1 + sin Φ) / ( 1 – sin Φ)

ANSWER: (1 – sin Φ) / ( 1 + sin Φ)

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