The double- threaded screw is made to rotate 2 revolutions for this th – McqOptions

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1.	The double- threaded screw is made to rotate 2 revolutions for this the screw advances to 40 mm. What is the pitch of helix?$
A.	40 mm
B.	10 mm
C.	20 mm
D.	22 mm
Answer» D. 22 mm

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