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Question

The axes of the two shafts are intersecting and are at 25° to each other. These two shafts are connected by Hook’s joint. At which position of the drives shaft velocity ratio will be maximum?

nks 'kkÝVksa ds v{k vkil esas dkVrs gS rFkk ,d nwljs esa 25º dk dks.k curk gSA budks gwd tkbUV ls tksMk tkrk gSA Mªkbo 'kkÝV dh dkSulh voLFkk esa vf/dre osx vuqikr gksxk

A.

90°, 270°

B.

 0°, 180°

C.

180°, 270°

D.

 90°, 180

Answer ( Option B)

 0°, 180°

Solution

 (UB / UA)   

where  A = driving shaft and 

          B = driven shaft and

  • α is the angle between shaft A and shaft B. 
  • α is the angle through which the shaft A rotates.
  • Velocity ratio is maximum when a = nπ where n = 1, 2, 3, ……
  • i.e.α = 0° or 180°.

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