When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

When an open coiled helical compression spring is subjected to an axia

1.	When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)
A.	<img src="/_files/images/mechanical-engineering/machine-design/591-419-1.png">
B.	<img src="/_files/images/mechanical-engineering/machine-design/591-419-2.png">
C.	<img src="/_files/images/mechanical-engineering/machine-design/591-419-3.png">
D.	<img src="/_files/images/mechanical-engineering/machine-design/591-419-4.png">
Answer» E.