Surprise Quiz-1

Which of the following is NOT a common classification of composites?

• Polymer Matrix Composites (PMC)

• Metal Matrix Composites (MMC)

• Carbon-Carbon Composites (CCC)

• Thermosetting Composites (TSC)

What is the main function of the matrix in a composite material?

• Provide strength and stiffness

• Transfer load between fibers and protect them

• Reduce the weight of the composite

• Increase electrical conductivity

Which of the following is a common method for manufacturing glass fibers?

• Pultrusion

• Melt Spinning

• Electrospinning

• Chemical Vapor Deposition (CVD)

Which closed mould process is widely used for high-volume composite manufacturing?

• Hand lay-up

• Spray-up

• Compression Molding

• Filament Winding

What is a common repairing technique for composite materials?

• Drilling and bolting

• Adhesive bonding

• Sandblasting

• Electroplating

Which of the following is NOT an elastic constant used in Hooke’s Law?

• Young’s modulus

• Poisson’s ratio

• Shear modulus

• Yield strength

Which type of material has the same elastic properties in all directions?

• Anisotropic

• Orthotropic

• Isotropic

• Heterogeneous

Which mechanical testing method is used to determine a material’s ability to withstand cyclic loading?

• Tensile test

• Bending test

• Impact test

• Fatigue test

The Tsai-Hill failure criterion is primarily used for which type of materials?

• Metals

• Isotropic materials

• Composite materials

•  Ceramics

What is the key difference between the Tsai-Hill and Tsai-Wu failure criteria?

• Tsai-Hill considers interaction between normal and shear stresses, while Tsai-Wu does not.

• Tsai-Wu includes interaction terms for different stress components, while Tsai-Hill does not.
  

• Tsai-Hill applies only to isotropic materials, while Tsai-Wu is for anisotropic materials.

• Tsai-Wu is derived from maximum stress theory, while Tsai-Hill is from strain energy theory.