Question

Which of the following is a low copper alloy?
1. White metal
2. Muntz metal
3. Bronze
4. German silver

Answer 1

Correct Answer - Option 1 : White metal

Explanation:

White metal 

• The white metal is an alloy of Lead and Lithium metal.
• White metal bearings are used in motor engines.
• The alkali metals are quite useful.
• It contains a very less amount of copper.

Muntz Metal

• Muntz metal is also a type of brass which contains 40% zinc and 60% Copper with excellent tensile strength and lesser ductility.
• It is also known as yellow metal. 
• The addition of 1% tin to Muntz metal increases corrosion resistance to marine environments and the Brass called Naval brass. 

Bronze

• An alloy of copper (75 to 95%) and tin (5 to 25%).
• Hard, resistant wear and can be cast into shape and rolled into wires.
• Corrosion-resistant.
• Used in hydraulic fittings, pump linings, rods, wires, and in making utensils.

German silver 

• German silver is an alloy of zinc, copper, and nickel metals, sometimes it also contains lead and tin metals in it.
• German silver varies in composition, the percentage of the three elements ranging approximately as follows: Copper from 50% to 61.6%
• Zinc from 19% to 17.2%
• Nickel from 30% to 21.1%.