mse exam 1

Sand is mostly composed of small particles of silicon dioxide. To what material class would you classify sand

Ceramic

A material with a high yield strength and low ductility will definitely be considered to have high toughness.

False

Which of the following contribute to the activation energy of the mass diffusion coefficient? I. Bond breakdage to move the atom from one position to the next. II. Bond formation to move the atom from one position to the next. III Entropic penalty for creating a more random system. IV. Bond strains associated with pushing atoms out of the way as an atom diffuses from one site to the next

I and IV

Considering its terrestrial abundance, indium is higher price than expected because of... additional extraction costs, difficulty with shaping the material into final product, geographical location of its mines

additional extraction costs

What can anodization of aluminum be used for? make the surface of aluminum harder, change color of aluminum, protect the aluminum against corrosion

all of them

You are hired for a composite manufacturer and the boss asks you to help them improve the mechanical performance of their fiberglass product. Which of the following might you investigate for this project? use of a chemical treatment on the glass fibers' surfaces, new geometrical arrangements of the glass fibers, lengths of the glass fibers used in composite

all of them

The concrete walls of a building most likely be classified as: metal, ceramic, glass, composite, elastomer

composite

Galvanizing a metal component involves the controlled electrochemical oxidation of the components surface

false

Geopolitical situations never influence the price of a material, but speculators can dramatically alter the price of a material

false

If a hard magnetic material is heated above its Curie temperature and then cooled back down to room temp, it will regain its original permanent magnetization

false

The relative price of two different elements can be estimated by their relative difference in extraplanetary abundance.

false

If you were asked to design a cell phone screen that couldn't be scratched, which material property would you maximize? resilience, hardness, ductility, or denisty

hardness

The materials property that describes the amount of heath energy stored for a given temperature differential is the: heat capacity, thermal conductivity, heat flux, thermal diffusivity, cte mismatch

heat capacity

Which material property for the bottle listed below is most important to break the bottle and get the scene correct without hurting the actor? low hardness, low elastic modulus, low yield strength, low toughness

low toughness

Prisms are capable of separating white light into separate colors because: material has low refractive index, material is dispersive, prism has specific shape

material is dispersive & prism has specific shape

Because scandium is at least 1000x more expensive than molybdenum, it can be concluded that: scandium is less earth abundant, scandium is only found in Us, scandium is good investment for my IRA

none of them

Which of the following materials properties is the most important when selecting a material needed to be driven by electrical voltages? thermal expansion coeff, piezoelectric coeff, thermal conductivity, electrical resistivity

piezoelectric coeff

This material likely has an atomic structure that resembles a "mess of spaghetti."

plexiglass

The visible light reflected off a car's hood is ... preferentially polarized, of the color that you perceive the car as being, randomly polarized

preferentially polarized and the color you perceive the car being

Rare earth elements are named so because: their terrestrial abundance is rare, they are named after a french word meaning heavy, rarely used on earth, rarely found in high concentrations

rarely found in high concentrations

Thermal barrier coatings on turbine blades have a low thermal conductivity in order to... reduce max temp, increase max temp experienced by underlying metal component?

reduce max temp

A thin, translucent plastic sheet appears green in color. Which of the following explanations may explain its appearance? absorbs green light, reflects green light, transmits green light

reflects and transmits green light

When light enters a material and changes its direction of propagation, this process is called: reflection, absorption, refraction

refraction

What is the inverse of electrical conductivity? admittance, resistance, conductance, resistivity

resistivity

You design a rod to hold a chandelier from the ceiling, but then your boss informs you that the chandelier will be twice as heavy. Your initial design will now plastically deform under the weight. Which of the following could be done to your original design to allow it to work with the new chandelier? same material shrink diameter, same material increase diameter, same diameter material with higher elastic modulus, same diameter material with higher yield strength

same material increase diameter, same diameter material with higher yield strength

What will help prevent galvanic corrosion?

separating metals and not allowing contact with water

This type of material magnetizes when a magnetic field is applied, but quickly demagnetizes after removal of the magnetic field antiferromagnetic material, soft ferromagnetic material, hard ferromagnetic material, hard ferrimagnetic material

soft ferromagnetic material

Why do we see "frosted windows?" surface roughness scatters light to distort image, surface roughness used to alter polarization of light and distorts image, light absorption used to distort image, higher visible light transmission than non-frosted windows

surface roughness scatters light to distort image

Elements with standard reduction potentials lower than water are susceptible to corrosion in aqueous environments, even when not in contact with another metal

true

If material is plastically deformed it is deformed permanently

true

Light reflected from a mirror is a good example of specular reflection

true

Materials with high dielectric constants will also be good electrical insulators

true

The remanent magnetization of a material is its level of permanent, internal magnetization in no applied magnetic field

true

Which of the following approaches would NOT be useful for improving a plastic's resistance to UV degradation? using cathodic protection, including additives to the plastic's formula, selecting a proper metal, adding a coating to the plastic's surface

using cathodic protection

Which elements would be a good selection for sacrificial electrode in the cathodic protection of Iron? zinc, manganese, nickel

zinc and manganese

An iron nut and bolt are used to attach two zinc plates together on the underside of a boat. If this boat is to be used in the ocean, what might happen? zinc plate undergo galvanic corrosion, iron nut and bolt undergo galvanic corrosion, both plate and nut and bolt undergo galvanic corrosion, none will corrode

zinc plate undergo galvanic corrosion