Isomorphous Alloys MCQ’s

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This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Isomorphous Alloys”.

1. In a binary isomorphous system which of the following is true?
a) The two metals are completely miscible in each other in liquid as well as solid form
b) The two metals are completely immiscible in each other in liquid as well as solid form
c) The two metals are completely miscible in each other in liquid form only
d) The two metals are completely miscible in each other in solid form only

2. The number of components are 2, the number of phases are 3 and degrees of freedom are 0. Then which of the following equilibrium is it?
a) Invariant
b) Univariant
c) Bivariant
d) Trivariant

3. How many components are present in unary phase system?
a) 1
b) 2
c) 3
d) 4

4. The number of components are 2, the number of phases are 2 and degrees of freedom are 1. Then which of the following equilibrium is it?
a) Invariant
b) Univariant
c) Bivariant
d) Trivariant

5. An alloy 30 wt% Ni- 70wt % Cu at 1315 °C (2400 °F) will lie in which state?
a) Solid state
b) Liquid state
c) Mixture of solid and liquid state
d) α state

6. The copper-nickel system is an example of solid solution hardening.
a) True
b) False

7. The number of components are 2, the number of phases is 1 and degrees of freedom are 2. Then which of the following equilibrium is it?
a) Invariant
b) Univariant
c) Bivariant
d) Trivariant

8. An alloy 30 wt% Ni- 70wt % Cu at 1095 °C (2000 °F) will lie in which state?
a) Solid state
b) Liquid state
c) Mixture of solid and liquid state
d) α state

9. In a copper nickel system the tensile strength increases with an increase in the percentage of nickel in the alloy.
a) True
b) False

10. In which of the following the alloy is rapidly cooled?
a) Anealing
b) Coring
c) Hot working
d) Cold working

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