Here are 1000 MCQs on Composite Materials (Chapterwise).
1. What is a composite material?
a) A single material with uniform properties
b) A natural material found in the environment
c) A combination of two or more materials with different properties
d) A type of ceramic
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Explanation: A composite material is formed by combining two or more materials with distinct properties to create a material with enhanced characteristics.
2. Which of the following is a composite material?
a) Aluminium
b) Glass
c) Steel
d) Carbon fiber
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Explanation: Carbon fiber is a composite material while Steel, Glass, Aluminium are alloy, ceramic and metal respectively. Composites are the material which consists of a matrix phase and reinforcement phase. The addition of reinforcements helps in enhancing the properties of the material.
3. What is the term for composite materials formed by suspending nonmetallic particles in a metal matrix?
a) Nonlinear composites
b) Cermet
c) Particulate composites
d) Linear composites
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Explanation: Nonmetallic particles in metal matrix results in composites called cermet. They are commonly classified into carbide-based and oxide-based composite materials.
4. What is the matrix phase in a composite material?
a) The primary material that holds the reinforcement together
b) The reinforcing material
c) The material with the highest density
d) The outer layer of the material
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Explanation: The matrix phase in a composite material is the primary material that holds the reinforcement (fibers or particles) together.
5. Which industry is the largest user of composite materials?
a) Construction
b) Sports
c) Transportation
d) Marine
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Explanation: Transportation industry is the largest user of the composite materials, having consumed around 1.3 billion pounds of composites in 2000. The second comes to the construction, then comes the marine and sports industry in third and fourth positions respectively.
6. Which of the following is a drawback of polymer matrix composites?
a) High operating temperature
b) High elastic properties
c) Low moisture expansion
d) High coefficients of thermal expansion
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Explanation: Polymer matrix composites has a high coefficients of thermal expansion, which states for a minimum increase in temperature the composite expands rapidly. High elastic properties, High operating temperature and Low moisture expansion are some of the desired properties of polymer matrix composites.
7. Which is not a thermoplastic composite manufacturing method?
a) Injection molding
b) Liquid phase infiltration
c) Pultrusion
d) Drift process
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Explanation: Liquid phase infiltration is a process used for the manufacturing of ceramic matrix composites, while all other methods can be used for the manufacturing of thermoplastic composites.
8. Which is not a function of the composite fibers?
a) Provides shape to the structure
b) To provide electrical conductivity
c) To provide stiffness
d) To carry the load
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Explanation: The reinforcements also provide strength and thermal stability to the composites. It is the matrix that provides shape to the composites.
9. Which is not a liquid composite molding process?
a) Vacuum-assisted resin injection molding
b) Resin transfer molding
c) Compression molding
d) Reaction injection molding
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Explanation: The liquid composite molding comprises various types of processes such as Resin transfer molding, reaction injection molding, Vacuum-assisted resin injection molding, Seemann’s Composite resin infusion molding process etc. While Compression molding is entirely a different type of composite molding process.
10. Which is not a general classification of Metal Matrix Composites (MMC)?
a) Fiber-reinforced MMC
b) Particulate-reinforced MMC
c) In situ MMC
d) SiC-reinforced MMC
View Answer
Explanation: The Metal Matrix Composites can be generally divided into 4. They are Fiber-reinforced MMC, Particulate-reinforced MMC, Dispersion-strengthened MMC and In situ MMC. SiC-reinforced MMC is an MMC that is reinforced with Silicon carbide fibers specifically.
Chapterwise Multiple Choice Questions on Composite Materials
- Materials – Fibers and Matrix
- Manufacturing
- Metal, Ceramic and Carbon Matrix Composites
- Fiber-Reinforced Lamina
- Static Mechanical Properties
- Macromechanical Behaviour of a Lamina
1. Materials – Fibers and Matrix
The section contains multiple choice questions and answers on matrix materials like polymer matrix, thermoset and thermoplastic matrix, reinforcing phase, fiber surface treatment, fibers incorporation in matrix, fiber content, density and void contents.
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2. Composite Materials MCQ on Manufacturing
The section contains questions and answers on manufacturing fundamentals, bag moulding and compression moulding, pultrusion, filament winding, liquid composite moulding process and other manufacturing process.
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3. Metal, Ceramic and Carbon Matrix Composites
The section contains MCQs on metal, ceramic and carbon matrix composites.
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4. Composite Materials Questions on Fiber-Reinforced Lamina
The section contains multiple choice questions and answers on fiber reinforced lamina characteristics, fiber matrix interactions, lamina elastic properties, interlaminar stresses and laminated structures.
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5. MCQ on Static Mechanical Properties
The section contains questions and answers on static mechanical properties.
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6. Macromechanical Behaviour of a Lamina
The section contains MCQs on anisotropic and orthotropic material relations, stiffness of orthotropic materials, compliance and engineering constants.
Wish you the best in your endeavor to learn and master Composite Materials!
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