Brittany Rhodes4395
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material science midterm

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Brittany Rhodes4395
Created by Brittany Rhodes4395 about 9 years ago
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Material Science midterm - easy

Material Science midterm - easy

Question 1 of 26

1

Choose all primary material selection issues

Select one or more of the following:

  • shape

  • cost

  • density

  • material properties

  • function

  • other

  • external factors

  • hardness

  • process (fabrication)

  • device variables

Explanation

Question 2 of 26

1

formula for density

Select one of the following:

  • stress/strain

  • mass/volume

  • delta L/L

Explanation

Question 3 of 26

1

The yield strength is where material starts to plastically deform

Select one of the following:

  • True
  • False

Explanation

Question 4 of 26

1

Formula for modulus of elasticity

Select one of the following:

  • mass/volume

  • stress/strain

  • delta L/L

Explanation

Question 5 of 26

1

Definition of modulus of elasticity

Select one of the following:

  • 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

Explanation

Question 6 of 26

1

Stress depends on the type of material being tested

Select one of the following:

  • True
  • False

Explanation

Question 7 of 26

1

Definition of Ultimate Tensile Strength (UTS)

Select one of the following:

  • 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

Explanation

Question 8 of 26

1

Resistance to plastic deformation or scratching or bending is...

Select one of the following:

  • hardness

  • fatigue endurance limit

  • yield strength

  • fracture toughness

Explanation

Question 9 of 26

1

the hardness of metals is tested with which test

Select one of the following:

  • brinell or rockewell

  • durometer score

Explanation

Question 10 of 26

1

the harness of polymers is tested with

Select one of the following:

  • brinell or rockewell

  • durometer score

Explanation

Question 11 of 26

1

Fatigue endurance limit does not apply to non-ferrous metals

Select one of the following:

  • True
  • False

Explanation

Question 12 of 26

1

For a material to be tough it needs to be what two things

Select one or more of the following:

  • ductile

  • durable

  • strength

  • stiff

Explanation

Question 13 of 26

1

which material has the highest modulus and density

Select one of the following:

  • steel

  • titanium

  • aluminum

Explanation

Question 14 of 26

1

Fill the blank space to complete the text.

Aluminum has a modulus and density that is the value of steel (ratio)

Explanation

Question 15 of 26

1

Fill the blank space to complete the text.

the equation for stress (in variable form) is

Explanation

Question 16 of 26

1

Pure shear stress is generally 1/2 of what?

Select one of the following:

  • normal stress

  • torsional shear stress

  • tensile strength

  • flexural stress

Explanation

Question 17 of 26

1

Equation for flexural normal stress

Select one of the following:

  • Mc/I

  • F/A

  • delta L/L

  • bd^3/12

Explanation

Question 18 of 26

1

In the equation Mc/I, what does the c stand for?

Select one of the following:

  • moment of inertia

  • distance from the neutral axis to the extreme fiber

  • shear stress

  • polar moment of inertia

Explanation

Question 19 of 26

1

Deflection is dependent on material type

Select one of the following:

  • True
  • False

Explanation

Question 20 of 26

1

What is the equation for deflection?

Select one of the following:

  • FL/AI

  • FL/AE

  • delta L/L

  • I/c

Explanation

Question 21 of 26

1

What is the equation for Factor of safety

Select one of the following:

  • stress allowable/stress actual

  • stress actual/stress allowable

Explanation

Question 22 of 26

1

In the factor of safety equation, which stress value is higher?

Select one of the following:

  • stress allowable

  • stress actual

Explanation

Question 23 of 26

1

What material can not be heat treated, only cold worked?

Select one of the following:

  • 400 SS

  • Aluminum

  • Steel

  • 300 SS

  • Titanium

Explanation

Question 24 of 26

1

Cyclic loading can cause a material to fail at stress values higher than the yield stress

Select one of the following:

  • True
  • False

Explanation

Question 25 of 26

1

What material does not have an endurance limit

Select one of the following:

  • steel

  • aluminum

Explanation

Question 26 of 26

1

Fill the blank space to complete the text.

A material is not likely to fail between the line and the yield stress line

Explanation

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