Machine Design
If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited

BSW
Square
Buttress
Acme

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
Do not require external supply of lubricant
Grease is used for lubrication

ANSWER DOWNLOAD EXAMIANS APP