Machine Design
When spring index increases, the value of Wahl's stress factor

Increases linearly
Increases exponentially
Remains same
Decreases linearly

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
One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
In a hydrodynamic lubricated bearing

The lubricant is forced between the journal and the bearing, by external pressure
There is no lubricant between the journal and the bearing
There is a thick film of lubricant between the journal and the bearing
There is a thin film of lubricant between the journal and the bearing

ANSWER DOWNLOAD EXAMIANS APP