When a double ‚Äö√Ñ√∂‚àö√ë‚àö¬®threaded screw is made to turn 120 degrees about axis. How much the screw advances through axis?$

1 ‚Äö√Ñ√∂‚àö√ñ‚àö√´ 3 of pitch of screw

1‚Äö√Ñ√∂‚àö√ñ‚àö√´3 of pitch of helix

1‚Äö√Ñ√∂‚àö√ñ‚àö√´3 of pitch of screw

1‚Äö√Ñ√∂‚àö√ñ‚àö√´4 of pitch of helix

The advancement is equal to pitch of helix.

When a double ‚Äö√Ñ√∂‚àö√ë‚àö¬®threaded screw

1.	When a double ‚Äö√Ñ√∂‚àö√ë‚àö¬®threaded screw is made to turn 120 degrees about axis. How much the screw advances through axis?$
A.	<sup>1</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>3</sub> of pitch of helix
B.	<sup>1</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>3</sub> of pitch of screw
C.	<sup>1</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>4</sub> of pitch of helix
D.	The advancement is equal to pitch of helix.
Answer» B. <sup>1</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>3</sub> of pitch of screw