Numerical - Speed steps, given speed & Φ

Q.  A machine tool has minimum speed of 100 r.p.m. How many speed steps are required by it to achieve speed of 200 rpm? (Geometric progression ratio = 1.06)
- Published on 16 Sep 15

a. 11
b. 12
c. 13
d. 14

ANSWER: 12

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    Discussion

  • Prabodh   -Posted on 14 Oct 20
    ยข=(nmax/nmin)^(1/z-1)
    1.06=(200/100)^(1/z-1)
    Z=13
  • Paras Sonawani   -Posted on 10 Oct 20
    no explain

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