Machine Design
A connecting rod should be

Equally strong in buckling about X-axis and Y-axis
Any one of the above
Strong in buckling about X-axis
Strong in buckling about Y-axis

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Machine Design
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will

Have contact at the bottom most of the bearing
Move towards left of the bearing making metal to metal contact
Move towards right of the bearing making no metal to metal contact
Move towards right of the bearing making metal to metal contact

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