Machine Design
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves

Axially downwards
Axially upwards
None of these
Axially upwards or downwards

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
In hydrodynamic bearings

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

ANSWER DOWNLOAD EXAMIANS APP