This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Non-Ferrous Metal”.
1. Alloy of copper and zinc is known as __________
a) Brass
b) Bronze
c) Duralumin
d) Nichrome
View Answer
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. 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. Major constituent of the gun metal is ____________
a) Copper
b) Nickel
c) Iron
d) Zinc
View Answer
Explanation: Gun metal (also known as red brass) contains 83% Cu and 2% Zn and 10% Sn.
4. Major constituent of Muntz metal is _____________
a) Copper
b) Nickel
c) Iron
d) Zinc
View Answer
Explanation: Mutz metal contains 60% Cu and 40% Zn. It is commonly used in architectural applications.
5. Major constituent of the Nichrome is _____________
a) Copper
b) Nickel
c) Iron
d) Zinc
View Answer
Explanation: Nichrome contains 80% Ni and 20% Cr. Nichrome mostly used as a resistant wire and in dental fillings.
6. Major constituent of Constantan alloy is ____________
a) Copper
b) Nickel
c) Iron
d) Zinc
View Answer
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. 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. Which of the following alloy is widely used in thermo couples?
a) Brass
b) Bronze
c) Duralumin
d) Nichrome
View Answer
Explanation: Nichrome contains 80% Ni and 20% Cr. It is used mostly in thermocouples and in strain gauges.
9. Major constituent of Duralumin alloy is ____________
a) Copper
b) Nickel
c) Iron
d) Aluminum
View Answer
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. What is the approximate percentage of Lead in soft solder?
a) 60
b) 50
c) 90
d) 99.02
View Answer
Explanation: Soft solder is the eutectic alloy of 50% Pb and 50% Sn, having a melting point of 450oC.
Sanfoundry Global Education & Learning Series – Manufacturing Engineering.
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