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