#1
Which of the following is a common semiconductor material?
Silicon
ExplanationSilicon is widely used in electronic devices due to its semiconductor properties.
#2
What is the process of converting a metal into its oxide?
Oxidation
ExplanationOxidation involves the reaction of a metal with oxygen to form an oxide.
#3
What is the most abundant metal in the Earth's crust?
Aluminum
ExplanationAluminum is the most abundant metal in the Earth's crust.
#4
What is the main ingredient in concrete?
Cement
ExplanationCement is the primary ingredient in concrete, binding the aggregate materials together.
#5
What is the primary component of bronze?
Copper
ExplanationCopper is the primary component of bronze, typically alloyed with tin.
#6
What is the name of the process of converting a solid directly into a gas?
Sublimation
ExplanationSublimation is the direct transition of a substance from solid to gas phase without passing through the liquid phase.
#7
Which of the following is a primary constituent of stainless steel?
Iron
ExplanationIron is the main component of stainless steel, along with chromium and other elements.
#8
What is the process of adding carbon to iron to make steel called?
Carburizing
ExplanationCarburizing involves introducing carbon into the surface of iron or steel to improve hardness.
#9
What is the term for the ability of a material to deform under stress and then return to its original shape when the stress is removed?
Elasticity
ExplanationElasticity refers to a material's ability to recover its original shape after being deformed.
#10
Which of the following is a property of ceramics?
Brittle fracture behavior
ExplanationCeramics often exhibit brittle fracture behavior, breaking without significant deformation.
#11
What is the process of coating a metal surface with a thin layer of another metal called?
Electroplating
ExplanationElectroplating involves using an electric current to deposit a thin layer of metal onto a conductive surface.
#12
Which of the following is a type of composite material?
Fiberglass
ExplanationFiberglass is a composite material made of glass fibers embedded in a polymer matrix.
#13
Which of the following materials exhibits shape memory effect?
Nickel-Titanium alloy
ExplanationNickel-Titanium alloy, also known as Nitinol, shows shape memory effect, returning to its original shape after deformation.