Machine Design
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

Is minimum at zero speed and increases monotonically with increase in speed
Becomes minimum at an optimum speed and then increases with further increase in speed
Is maximum at zero speed and decreases monotonically with increase in speed
Remains constant at all speeds

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Set screws are

Slotted for a screw driver and generally used with a nut
Used to prevent relative motion between parts
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Similar to stud

ANSWER DOWNLOAD EXAMIANS APP