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