Surface preparation for Metallising the abrasives used for final cleaning is a) Chilled iron grit G.24, as defined in BS : 2451 b) Washed salt free angular silica sand of mesh size 12 to 30 with a minimum of 40% retained on a 20 mesh c) either (a) or (b) * d) d) neither (a) or (b)

Surface preparation for Metallising the abrasives used for final cleaning is a) Chilled iron grit G.24, as defined in BS : 2451  
b) Washed salt free angular silica sand of mesh size 12 to 30 with a minimum of 40%  retained on a 20 mesh
c) either (a) or (b) *  
d) d) neither (a) or (b)
by

1 Answer

Answer :

c) either (a) or (b) *
by

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