SSC JE Mechanical Engineering 2018 Set 3 Paper

The grinding wheel is considered better when the grinding ratio will be maximum
Grinding efficiency $\mathit{E}=\frac{\mathit{G}}{\mathit{V}}$
where G = Grinding ratio
V = Specific energy
“ Grinding ratio which is defined as the volume of metal removed per unit volume pf wheel wear.”
i.e. $\mathit{G}=\frac{{\mathit{V}}_{\mathit{W}}}{{\mathit{V}}_{\mathit{S}}}$
$=\frac{\mathrm{volume}\mathrm{of}\mathrm{metal}\mathrm{removed}}{\mathrm{volume}\mathrm{of}\mathrm{wheel}\mathrm{wear}}$