Which of the following are true for copper alloys
Explanation: Properties of copper.
Which of the following contain copper
Explanation: All the mentioned alloys contain copper to some extent.
Which of the following are true
Explanation: Brass is a good thermal conductor,is cheaper and has poor machinability.
As the amount of zinc increases
Explanation: Brass contains zinc and copper. Zinc affects strength with direct increase in strength with increase of zinc content.
Which of the following are true for aluminium bronze
Explanation: Color of aluminium bronze is similar to gold. Other two are the properties of alloys.
Which of the following statements for phosphorus bronze is true?
Explanation: It has good tensile strength, corrosion resistance and is used for bearings.
Gunnmetal is an alloy of copper which __ % tin and __% zinc.
Explanation: Zinc is used to improve fluidity during casting and hence is kept lesser than tin.
Monel metal is a copper nickel alloy of __% nickel and __%copper.
Which of the following are true for die casting alloys?
Explanation: Characteristics of die casting alloys.