Machine Design
A key capable of tilting in a recess milled out in a shaft is known as

Hollow saddle key
Feather key
Woodruff key
Flat saddle key

ANSWER DOWNLOAD EXAMIANS APP

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 small size tap bolts except that a greater variety of shapes of heads are available
Similar to stud

ANSWER DOWNLOAD EXAMIANS APP