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The percentage of copper and zinc in cartridge brass is _______ and __________ respectively.

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The percentage of copper and zinc in cartridge brass is _______ and __________ respectively.

(a) 30%,70%

(b) 70%, 30%

(c) 40%, 60%

(d) 60%, 40%

I had been asked this question during an online exam.

This interesting question is from Non-Ferrous Metals and Alloys in section Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

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The correct option is (b) 70%, 30%

To explain: The percentage of copper and zinc in cartridge brass is 70% and 30% respectively. It is a common variety of brass which is used for cartridges, springs etc.

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