Answer Happy

Part A: Multiple choice Questions Multiple choice questions focus on fundamentals of the topic Questions are similar to those in Quiz 3 and Quiz 4. And here are some more 1. What is the effect of temperature on stiffness of a metal? a. Temperature has no effect on stiffness of a metal b. As temperature increases stiffness of metal decreases c. As temperature increases stiffness of metal increases d. None of the above 2. High carbon steel cames carbon Sage a. 0.1 to 0.3% b. 0.3 to 0.6% c. 0.6 to 0.8% d. 0.8 to 1.5% 3. Which among the following is the characteristics of polymers? a. High tensile strength High coefficient of friction c. Low density d. All of the above 4. Which of the following characteristics distinguishes the stainless steels from other stoel types a. They are more corrosion resistant b. They are stronger c. They are more wear resistant d. They are more ductile 5. The form of corrosion that occursalons grain boundaries for some alloys and in specific environments a. Erosion Corrosion b. Intergranular corrosion c. Galvanic Corrosion d. Pitting Corrosion 6. As the carbon content decreases in se a. The impact energy increases and the doctile to brittle transition temperature decreases b. The impact energy decreases and the doctile to brittle transition temperature increases c. Both increase d. Both decrease 7. Strength of metals may be increased by: a decreasing grain size b. solid solution or precipitate strengthening c. cold working d all of the above 8. Railway rails are normally made of a. mild steel b. high carbon c. tungsten steel d. cast iron steel 9. The unique property of grey cast iron is is high a malleability b. ductility c. damping characteristics d. All of the above 10. Which of the following have a significant influence on a materials electrical resistivity! a. Impurity concentration b. Temperature c. Percent cold work d. All of the above 11. Copolymers are a. polymers consisting of more than one type of mers b. analogous to alloys in case of metak c. made to combine different properties d. all of the above 12. Which of the following is an example of particle-reinforced composite a Fiberglass b. Sandwich panels Concrete damine