Swab is used for

A Smoothing and cleaning out depressions in the mould
B Cleaning the moulding sand
C Moistening the sand around the edge before removing pattern
D Reinforcement of sand in the top part of the moulding box

Correct Answer: Moistening the sand around the edge before removing pattern

Swab is a hemp fiber brush used for moistening the edges of sand mould, which are in contact with the pattern surface, before withdrawing the pattern.
It is also used for coating the liquid blacking on the mould faces in dry sand moulds.
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