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22. A vertical profile perpendicular to the crest line of an asymmetrical ripple is given in the figure. The calculated ripple index is………..
Ripple index = (Wavelength) / (Height)
Wavelength = Stoss length + Lee length = (40 + 200) mm = 240 mm
Height = 60 mm
So, Ripple index = 240 mm / 60 mm = 4 (Answer)
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