Machine Design
Set screws are

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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Spring index is

Load required to produce unit deflection
Its capability of storing energy
Indication of quality of spring
Ratio of coil diameter to wire diameter

ANSWER DOWNLOAD EXAMIANS APP