Machine Design
In hydrodynamic bearings

Do not require external supply of lubricant
Grease is used for lubrication
The oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A woodruff key is

All of these
Fitted in pairs at right angles
A tapered key with head at one end
Capable of tilting in a recess milled out in the shaft

ANSWER DOWNLOAD EXAMIANS APP