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Usage of ___________ for metallizing helps spray the metal powder in the correct place.

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Usage of ___________ for metallizing helps spray the metal powder in the correct place.

(a) Air, oxygen, and combustible gas

(b) Oxyacetylene powder gun

(c) Silicon dioxide

(d) Hydrogen peroxide

I got this question in an interview.

My question is taken from Metal Spraying and Hard Facing, Age Hardening topic in chapter Wear of Metals, Mechanical Properties and Testing of Engineering Material & Metallurgy

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The correct option is (b) Oxyacetylene powder gun

Best explanation: One method of metalizing employs the usage of air, oxygen, and combustible gas. This method forms loose and friable oxides. Another method employs have of oxyacetylene gunpowder, which can spray the metal powder in place or over almost any contoured surface.

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