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MCQs 1: Which type of materials are used as bridges between human tissues and metals?

Polymeric biomaterials Ceramic biomaterials Metallic biomaterials All of these
Answer Explanation

MCQs 2: Which of the following statements is/are true for cold working process? 1. Cold working process does not provide good surface finish 2. Cold working process produces internal stress in a metal 3. Fatigue strength of metals can be improved 4. Cold working process cannot take place below recrystallization temperature

statement 1 and statement 2 statement 2 and statement 3 statement 3 and statement 4 all the above statements are true
Answer Explanation

MCQs 3: Why are internal stresses not produced in hot working process?

Micro structures undergo distortion Hot working process do not undergo recrystallization Hot working process undergo recrystallization None of the above
Answer Explanation

MCQs 4: What is meant by Frenkel defect?

defect in which interstitial position is occupied by missing atoms defect in which positive and negative ions are missing defect in which interstitial position is occupied by extra atom in the crystal without disorganizing the parent atom none of the above
Answer Explanation

MCQs 5: When are the slip lines observed?

after plastic deformation before plastic deformation after mechanical working after annealing
Answer Explanation

MCQs 6: Which type of composite materials the sandwich panels are?

Structural Fiber reinforced Particle reinforced None of the above
Answer Explanation

MCQs 7: Which of the following statements is true?

Ceramic materials have low melting point Porcelain is used as insulating material in spark plugs Graphite is viscoelastic in nature Compacting iron oxide powder ceramic tools are prepared
Answer Explanation

MCQs 8: Which among the following rubbers are used for automobile tyres?

Only Polyurethane rubbers Only Butadiene rubbers Both Polyurethane and Butadiene are used None of these
Answer Explanation

MCQs 9: What is the byproduct formed by the condensation of methyl alcohol and acetic acid to form ester?

water hydrogen oxygen none of the above
Answer Explanation

MCQs 10: Which materials can be used to manufacture elastomers?

Limestone Petroleum Alcohol All of the above
Answer Explanation

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