Q.47. A natural feed journal bearing of diameter 50 mm and length 50 mm operating at 20 revolution/second carries a load of 2.0 k N. The lubricant used has a viscosity of 20 mPa s. The radial clearance is 50 μm. The Sommerfeld number for the bearing is
(A) 0.062
(B) 0.125
(C) 0.250
(D) 0.785
Answer: (B)
Explanation:
