In a square and ground helical spring the effective number of turns is incresead by a. 1 b. 2 c. 1.5 d. 0 Ans: b
77. Frequency of the fluctuating load of helical compression spring should be  a. lees than natural frequency of vibration
b. twenty times the natural frequency of vibration
c. slightly greater than the natural frequency
d. twenty times less than the natural frequency of vibration

1 Answer

Answer :

d. twenty times less than the natural frequency of vibration

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