Material Science midterm - easy

Descripción

material science midterm
Brittany Rhodes4395
Test por Brittany Rhodes4395, actualizado hace más de 1 año
Brittany Rhodes4395
Creado por Brittany Rhodes4395 hace alrededor de 9 años
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Resumen del Recurso

Pregunta 1

Pregunta
Choose all primary material selection issues
Respuesta
  • shape
  • cost
  • density
  • material properties
  • function
  • other
  • external factors
  • hardness
  • process (fabrication)
  • device variables

Pregunta 2

Pregunta
formula for density
Respuesta
  • stress/strain
  • mass/volume
  • delta L/L

Pregunta 3

Pregunta
The yield strength is where material starts to plastically deform
Respuesta
  • True
  • False

Pregunta 4

Pregunta
Formula for modulus of elasticity
Respuesta
  • mass/volume
  • stress/strain
  • delta L/L

Pregunta 5

Pregunta
Definition of modulus of elasticity
Respuesta
  • where material property begins to plastically deform
  • maximum stress a material can withstand
  • slope of the elastic region of the stress/strain curve
  • where the material fractures

Pregunta 6

Pregunta
Stress depends on the type of material being tested
Respuesta
  • True
  • False

Pregunta 7

Pregunta
Definition of Ultimate Tensile Strength (UTS)
Respuesta
  • Slope of the elastic region of a stress strain curve
  • maximum stress a material can withstand
  • stress where a material fails
  • where material starts to plastically deform

Pregunta 8

Pregunta
Resistance to plastic deformation or scratching or bending is...
Respuesta
  • hardness
  • fatigue endurance limit
  • yield strength
  • fracture toughness

Pregunta 9

Pregunta
the hardness of metals is tested with which test
Respuesta
  • brinell or rockewell
  • durometer score

Pregunta 10

Pregunta
the harness of polymers is tested with
Respuesta
  • brinell or rockewell
  • durometer score

Pregunta 11

Pregunta
Fatigue endurance limit does not apply to non-ferrous metals
Respuesta
  • True
  • False

Pregunta 12

Pregunta
For a material to be tough it needs to be what two things
Respuesta
  • ductile
  • durable
  • strength
  • stiff

Pregunta 13

Pregunta
which material has the highest modulus and density
Respuesta
  • steel
  • titanium
  • aluminum

Pregunta 14

Pregunta
Aluminum has a modulus and density that is [blank_start]1/3[blank_end] the value of steel (ratio)
Respuesta
  • 1/3

Pregunta 15

Pregunta
the equation for stress (in variable form) is [blank_start]F/A[blank_end]
Respuesta
  • F/A

Pregunta 16

Pregunta
Pure shear stress is generally 1/2 of what?
Respuesta
  • normal stress
  • torsional shear stress
  • tensile strength
  • flexural stress

Pregunta 17

Pregunta
Equation for flexural normal stress
Respuesta
  • Mc/I
  • F/A
  • delta L/L
  • bd^3/12

Pregunta 18

Pregunta
In the equation Mc/I, what does the c stand for?
Respuesta
  • moment of inertia
  • distance from the neutral axis to the extreme fiber
  • shear stress
  • polar moment of inertia

Pregunta 19

Pregunta
Deflection is dependent on material type
Respuesta
  • True
  • False

Pregunta 20

Pregunta
What is the equation for deflection?
Respuesta
  • FL/AI
  • FL/AE
  • delta L/L
  • I/c

Pregunta 21

Pregunta
What is the equation for Factor of safety
Respuesta
  • stress allowable/stress actual
  • stress actual/stress allowable

Pregunta 22

Pregunta
In the factor of safety equation, which stress value is higher?
Respuesta
  • stress allowable
  • stress actual

Pregunta 23

Pregunta
What material can not be heat treated, only cold worked?
Respuesta
  • 400 SS
  • Aluminum
  • Steel
  • 300 SS
  • Titanium

Pregunta 24

Pregunta
Cyclic loading can cause a material to fail at stress values higher than the yield stress
Respuesta
  • True
  • False

Pregunta 25

Pregunta
What material does not have an endurance limit
Respuesta
  • steel
  • aluminum

Pregunta 26

Pregunta
A material is not likely to fail between the [blank_start]endurance limit[blank_end] line and the yield stress line
Respuesta
  • endurance limit
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