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