# 3pilihanWhat is brass primarily made of?Copper and ZincIron and CarbonAluminum and CopperTin and Lead
# 5pilihanWhy are alloys often used instead of pure metals?They are cheaperThey are stronger and more durableThey are lighterThey are easier to find
# 6pilihanWhich of the following alloys is used in aircraft manufacturing due to its light weight and strength?Aluminum alloyBrassBronzeStainless Steel
# 7pilihanWhat is stainless steel primarily made from?Iron, Carbon, and ChromiumCopper and TinLead and TinIron and Zinc
# 8pilihanWhich alloy is known for having a low melting point and is used in electrical fuses?SolderSteelBrassPewter
# 9pilihanWhat is the main advantage of using alloys in construction?They are more colorfulThey are more environmentally friendlyThey provide increased strength and flexibilityThey are easier to recycle
# 10pilihanWhich of these alloys is known for its resistance to rust and staining?Sterling SilverStainless SteelCast IronBrass
# 11pilihanWhich property is common to most metals?BrittlenessHigh densityPoor electrical conductivityLow melting point
# 12pilihanWhat is a common property of non-metals?Good conductor of electricityHigh melting pointBrittleMalleable
# 14pilihanWhich property is typical of metals in terms of heat?InsulatorConducts heatTransparentColorless
# 15pilihanWhich of these is a non-metal property?DuctileGood conductor of heatPoor conductor of electricityShiny
# 17pilihanWhat is malleability?Ability to be drawn into wiresAbility to be hammered into thin sheetsAbility to conduct electricityAbility to resist corrosion
# 19pilihanWhat is ductility?Ability to conduct heatAbility to be drawn into wiresAbility to reflect lightAbility to absorb water
# 20pilihanWhich of these is a property of metals?Dull appearancePoor conductor of heatHigh densityBrittle