A refrigerator unit having a mass of 35 kg is to be supported on three – McqOptions

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1.	A refrigerator unit having a mass of 35 kg is to be supported on three springs, each having spring stiffness. The unit operates at 480 rpm. If only 10% of the shaking force is allowed to transmit to the supporting structure, the value of stiffness will be nearly
A.	2.7 N/mm
B.	3.2 N/mm
C.	3.7 N/mm
D.	4.2 N/mm
Answer» B. 3.2 N/mm

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