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PreviousCoefficient of fluctuation of speed is defined as: (i) (Nmax + Nmin)/Nmean (ii) (Nmax − Nmin)/Nmean (iii) Nmean/Nmax (iv) Nmax/Nmin.NextA roller follower is preferred over a knife-edge follower mainly because it: (i) Has higher friction (ii) Reduces wear and friction (iii) Requires no cam (iv) Cannot transmit motion.
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