Machine Design
A hollow saddle key is

A taper key which fits half in the key way of hub and half in the key way of shaft
Provided in pairs at right angles and each key is to withstand torsion in one direction only
A taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
A taper key which fits in a key way of the hub and is flat on the shaft

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
In hydrostatic bearings

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

ANSWER DOWNLOAD EXAMIANS APP