Machine Design
In hydrodynamic bearings

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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Elastic nut is a locking device in which

Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
A slot is cut partly in middle of nut and then slot reduced by tightening a screw
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end
One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

ANSWER DOWNLOAD EXAMIANS APP