Machine Design
The angle of twist of shaft is

Directly proportional to (shaft diameter)²
Inversely proportional to (shaft diameter)⁴
Directly proportional to (shaft diameter)⁴
Inversely proportional to (shaft diameter)²

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A tap bolt

Has a head on one end and a nut fitted to the other
Has pointed threads
Has both the ends threaded
Has head at one end and other end fits into a tapped hole in the other part to be joined

ANSWER DOWNLOAD EXAMIANS APP