Which one of the following is criterion in the design of

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Which one of the following is criterion in the design of hydrodynamic Journal bearings?

1. Sommerfield number
2. Rating life
3. Specific dynamic capacity
4. Rotation factor

Correct Option: A

Sommerfeld Number, also known as Bearing Characteristic Number,

S =	Zn	·		D		²
	P			C_d