MCQs on Non-Ferrous Metal
1 - Question
Alloy of copper and zinc is known as __________
a) Brass
b) Bronze
c) Duralumin
d) Nichrome
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Explanation: Brass is a substitutional alloy of copper and zinc. It has many useful properties, such as low melting point, workability, electrical conductivity and thermal conductivity, corrosion resistance, etc.
2 - Question
Alloy of Ni and Fe is termed as ___________
a) Brass
b) Bronze
c) Duralumin
d) Invar
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Explanation: Invar is an alloy of nickel and iron generically known as FeNi36. It has low thermal expansion coefficient.
3 - Question
Major constituent of the gun metal is ____________
a) Copper
b) Nickel
c) Iron
d) Zinc
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Explanation: Gun metal (also known as red brass) contains 83% Cu and 2% Zn and 10% Sn. advertisement
4 - Question
Major constituent of Muntz metal is _____________
a) Copper
b) Nickel
c) Iron
d) Zinc
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Explanation: Mutz metal contains 60% Cu and 40% Zn. It is commonly used in architectural applications.
5 - Question
Major constituent of the Nichrome is _____________
a) Copper
b) Nickel
c) Iron
d) Zinc
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Explanation: Nichrome contains 80% Ni and 20% Cr. Nichrome mostly used as a resistant wire and in dental fillings.
6 - Question
Major constituent of Constantan alloy is ____________
a) Copper
b) Nickel
c) Iron
d) Zinc
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Explanation: Constantan (also known as Eureka/Ferry) contains 60% Cu and 40% Ni. It finds its mainly in thermocouples and has strong negative seebeck coefficient above 0oC.
7 - Question
Major constituent of Elektron alloy is ____________
a) Copper
b) Nickel
c) Magnesium
d) Zinc
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Explanation: Elektron contains 3-12% aluminum and 2% zinc, 0.03% manganese and rest is magnesium. It is very light alloy and used where weight is the major consideration in design.
8 - Question
Which of the following alloy is widely used in thermo couples?
a) Brass
b) Bronze
c) Duralumin
d) Nichrome
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Explanation: Nichrome contains 80% Ni and 20% Cr. It is used mostly in thermocouples and in strain gauges.
9 - Question
Major constituent of Duralumin alloy is ____________
a) Copper
b) Nickel
c) Iron
d) Aluminum
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Explanation: Duralumin is the age hardenable alloy of aluminium alloyed mainly with copper and with manganese and magnesium. Being a lightweight alloy, duralumin finds its use widely in aerospace industry.
10 - Question
What is the approximate percentage of Lead in soft solder?
a) 60
b) 50
c) 90
d) 99.02
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Explanation: Soft solder is the eutectic alloy of 50% Pb and 50% Sn, having a melting point of 450oC.