Biomaterial Properties MCQ Questions PDF

Biomaterial Properties - MCQ Questions Question 1: Which of the following describes the property of a material to withstand permanent deformation under a compressive load without rupturing? A) Ductility B) Malleability C) Brittleness D) Toughness Answer: B) Malleability Question 2: Which p...

Biomaterial Properties - MCQ Questions Question 1: Which of the following describes the property of a material to withstand permanent deformation under a compressive load without rupturing? A) Ductility B) Malleability C) Brittleness D) Toughness Answer: B) Malleability Question 2: Which property describes the maximum stress that a material can withstand before failure in tension? A) Yield Strength B) Ultimate Tensile Strength C) Elasticity D) Proof Stress Answer: B) Ultimate Tensile Strength Question 3: What is the term for the amount of energy absorbed by a material when it is stressed, without exceeding its proportional limit? A) Resilience B) Toughness C) Flexibility D) Elasticity Answer: A) Resilience Question 4: The ability of a fluid to resist flow due to internal frictional forces is called: A) Adhesion B) Cohesion C) Creep D) Viscosity Answer: D) Viscosity Question 5: Which type of stress occurs when a body is subjected to two sets of forces directed away from each other in a straight line? A) Shear Stress B) Compressive Stress C) Tensile Stress D) Complex Stress Answer: C) Tensile Stress Question 6: Which property measures a material's resistance to indentation? A) Toughness B) Hardness C) Flexibility D) Creep Answer: B) Hardness Question 7: What term describes the greatest stress that a material can sustain without any permanent deformation? A) Yield Strength B) Elastic Limit C) Proof Stress D) Ultimate Strength Answer: B) Elastic Limit Question 8: A stress that resists a twisting motion or sliding of one part of a body over another is known as: A) Compressive Stress B) Shear Stress C) Tensile Stress D) Complex Stress Answer: B) Shear Stress Question 9: In dental materials, which type of adhesion involves the attraction between atoms or molecules of the same material? A) Cohesion B) Mechanical Adhesion C) Chemical Adhesion D) Surface Tension Answer: A) Cohesion Question 10: The stress at which a material fails due to repeated cyclic loading within the elastic limit is called: A) Ultimate Strength B) Proof Stress C) Fatigue Strength D) Modulus of Elasticity Answer: C) Fatigue Strength Question 11: Which type of fluid has a constant viscosity that is not dependent on the strain rate? A) Dilatant B) Pseudoplastic C) Newtonian D) Viscous Answer: C) Newtonian Question 12: In the Munsell color system, which attribute refers to the lightness or darkness of a color? A) Hue B) Chroma C) Value D) Metamerism Answer: C) Value Question 13: Which type of corrosion involves a direct combination of metallic and non-metallic elements, often through oxidation? A) Electrochemical Corrosion B) Mechanical Corrosion C) Chemical Corrosion D) Ionic Corrosion Answer: C) Chemical Corrosion Question 14: The ability of a material to deform under load and return to its original form after the load is removed is called: A) Toughness B) Resilience C) Elasticity D) Plasticity Answer: C) Elasticity Question 15: The phenomenon where objects that appear color-matched under one light source look different under another is known as: A) Transparency B) Translucency C) Fluorescence D) Metamerism Answer: D) Metamerism Question 16: The resistance of a liquid to flow, often due to internal friction, is termed: A) Creep B) Viscosity C) Adhesion D) Flexibility Answer: B) Viscosity Question 17: When a wire with an original length of 0.1 m stretches by 0.001 m under tensile load, the strain would be: A) 0.01 B) 0.1 C) 1.0 D) 10 Answer: A) 0.01 Question 18: The modulus of elasticity, which represents the rigidity of a material, is the ratio of: A) Stress to strain B) Force to area C) Strain to stress D) Stress to pressure Answer: A) Stress to strain Question 19: In the context of adhesion, what does a low contact angle between a liquid and solid indicate? A) Poor wetting B) High surface tension C) Excellent wetting D) No adhesion Answer: C) Excellent wetting Question 20: The fatigue resistance of a dental material is influenced by which of the following? A) The modulus of elasticity B) The magnitude and number of loading cycles C) The color of the material D) The viscosity of the material Answer: B) The magnitude and number of loading cycles Question 21: Creep is a property that is especially relevant for which of the following dental materials due to its relatively low melting component? A) Dental amalgam B) Porcelain C) Composite resin D) Gold alloy Answer: A) Dental amalgam Question 22: A high surface energy in a solid material will generally: A) Encourage wetting B) Prevent wetting C) Increase viscosity D) Increase brittleness Answer: A) Encourage wetting Question 23: In dental materials, tarnish is primarily: A) A form of corrosion that completely degrades the material B) A surface discoloration due to reaction with the environment C) A process that strengthens the material D) An irreversible chemical bond Answer: B) A surface discoloration due to reaction with the environment Question 24: The greatest stress a material can sustain while still maintaining a linear relationship between stress and strain is known as: A) Elastic Limit B) Proportional Limit C) Yield Strength D) Ultimate Strength Answer: B) Proportional Limit Question 25: Which hardness test uses a diamond indenter with a pyramidal shape to measure the material's resistance to indentation? A) Brinell Hardness Test B) Rockwell Hardness Test C) Knoop Hardness Test D) Vickers Hardness Test Answer: D) Vickers Hardness Test Question 26: Which of the following is true about brittle materials? A) They can withstand high levels of strain before breaking B) They fracture easily without much deformation C) They are highly malleable D) They exhibit significant plastic deformation Answer: B) They fracture easily without much deformation Question 27: In the oral environment, which type of corrosion requires the presence of an electrolyte, such as saliva? A) Dry Corrosion B) Chemical Corrosion C) Electrochemical Corrosion D) Oxidative Corrosion Answer: C) Electrochemical Corrosion