1

### GATE ME 2005

Which one of the following is criterion in the design of hydrodynamic journal bearings?
A
Sommerfeld number
B
Rating life
C
Specific dynamic capacity
D
Rotation factor
2

### GATE ME 1998

The basic load rating of a ball bearing is
A
the maximum static radial load that can be applied without causing any plastic deformation of bearing components
B
the radial load at which $90$% of the group of apparently identical bearings run for one million revolutions before the first evidence of failure.
C
the maximum radial load that can be applied during operation without any plastic deformation of bearing components
D
a combination of radial and axial loads that can be applied without any plastic deformation
3

### GATE ME 1997

To restore stable operating condition in a hydrodynamic journal bearing, when it encounters higher magnitude loads.
A
oil viscosity is to be decreased
B
oil viscosity is to be increased
C
oil viscosity index is to be increased
D
oil viscosity index is to be decreased
4

### GATE ME 1996

In thick film hydrodynamic journal bearings, the coefficient of friction
A
B
C