1. Which of the following is not a name for phases present in a system of material in various conditions?
a) Phase diagram
b) Equilibrium diagram
c) Interstitial diagram
d) Constitutional diagram
Explanation: A phase diagram is a graphical representation of the phases present in the system of materials at various temperatures, pressures, and compositions. These diagrams show the constitution of alloys as a function of temperature under equilibrium conditions. They are otherwise also known as equilibrium or constitutional diagrams.
2. Which of the following cannot be obtained using a phase diagram?
a) Melting temperatures of various phases
b) Temperature range for solidification
c) Equilibrium solid solubility
d) Purity of materials
Explanation: A phase diagram is a graphical representation of the phases present in the system of materials at various temperatures, pressures, and compositions. It can be used to determine the melting temperature of various phases, the range of solidification, and the equilibrium solid solubility of one element in another.
3. A specific body of material or a series of alloys with the same compositions is/are known as _________
Explanation: A component is considered as a pure metal or compound of an alloy, whereas alloys are mixtures of two or more metals or non-metals. The system may be defined as either a specific body of material or a series of possible alloys consisting of the same components.
4. How many types of systems are applicable for phase diagrams?
Explanation: System may be defined as either a specific body of material or a series of possible alloys consisting of the same components. A system having one component is called as a unary system. Similarly, two, three, and four component systems are called binary, ternary, and quaternary systems respectively.
5. The maximum concentration of solute that can be added is defined as ____________
a) Solution limit
b) Solubility limit
d) Degrees of freedom
Explanation: Solubility limit is defined as the maximum concentration of solute that may be added without the formation of a new phase. An excess addition may result in the formation of another solid solution or compound. Degrees of freedom is defined as the number of independent variables that can be changed independently without changes in the phases of the system.