A) They have lower density B) They conduct electricity poorly C) They contain more flaws and defects D) They expand when heated
A) They have fewer surface defects B) They contain more impurities C) They heat up faster D) They are more flexible
A) Magnetic properties of materials B) Electrical resistance in circuits C) The relationship between crack length and fracture stress D) Thermal conductivity of metals
A) It melts at low temperatures B) It expands when cooled C) Surface flaws cause stress concentration D) It conducts heat poorly
A) They don't rust easily B) They can deform plastically C) They are always crystalline D) They conduct electricity well
A) Strength is about fracture, stiffness about deformation B) Strength measures weight, stiffness measures volume C) Strength concerns electricity, stiffness concerns heat D) Strength relates to color, stiffness to shape
A) They are always heavier B) They conduct heat better C) They are more expensive to produce D) They combine different material properties
A) They heat up unevenly B) They conduct electricity better C) Atomic bonds are directional D) They contain more air pockets
A) Failure due to single impact B) Failure from electrical current C) Failure under repeated loading D) Failure from overheating
A) Rapid fracture under impact B) Change in electrical resistance C) Color change with temperature D) Slow deformation under constant load
A) Only very large grains affect strength B) Smaller grains generally increase strength C) Grain size has no effect D) Larger grains always increase strength
A) To make it lighter B) To improve electrical conductivity C) To change its color D) To put concrete in compression
A) Point of electrical conductivity change B) Transition from elastic to plastic deformation C) Temperature where color changes D) Density measurement point
A) They can repair damage biologically B) They conduct electricity well C) They have magnetic properties D) They contain special metals
A) It only changes appearance B) It improves electrical properties C) Removing surface flaws increases strength D) It reduces thermal conductivity
A) They work mainly in compression B) They have magnetic properties C) They are always made of steel D) They conduct stress evenly
A) Titanium alloy B) Aluminum C) Carbon fiber D) Mild steel
A) Fatigue B) Creep C) Wear D) Corrosion
A) Hardness B) Toughness C) Strength D) Stiffness
A) Plastic collapse B) Creep C) Brittle fracture D) Fatigue
A) Poor thermal resistance B) Low melting point C) Brittleness D) High cost
A) Malleability B) Elasticity C) Ductility D) Plasticity
A) Stone B) Wood C) Clay D) Sand
A) Uniform composition B) Optimized composite structures C) Perfect crystallinity D) High density
A) Brittleness B) Ductility C) Hardness D) Stiffness |