$1.$What is the primary benefit of using variable pitch in helical springs?

A$)$ It allows for a uniform color distribution

B$)$ It enables the spring to handle varying loads more efficiently

C$)$ It reduces the electrical resistance of the spring

D$)$ It increases the spring's light emission under compression

$2.$Helical torsion springs are designed to handle which type of stress?

A$)$ Axial

B$)$ Bending

C$)$ Torsional

D$)$ Shear