General Studies · Metrology and Layout
In layout marking media, Prussian blue or a blue-based dye is typically dissolved in which of the following to form a quick-drying 'marking blue'?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Methylated spirit✓
- 2Chalk powder paste
- 3Copper sulphate solution
- 4Lead powder solution
Correct answer
Methylated spirit
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