3902715
Description
Quiz by Brittany Rhodes4395, updated more than 1 year ago
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Created by Brittany Rhodes4395
over 8 years ago
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Question 1
Question
Choose all primary material selection issues
Answer
-
shape
-
cost
-
density
-
material properties
-
function
-
other
-
external factors
-
hardness
-
process (fabrication)
-
device variables
Question 2
Question
formula for density
Answer
-
stress/strain
-
mass/volume
-
delta L/L
Question 3
Question
The yield strength is where material starts to plastically deform
Answer
- True
- False
Question 4
Question
Formula for modulus of elasticity
Answer
-
mass/volume
-
stress/strain
-
delta L/L
Question 5
Question
Definition of modulus of elasticity
Answer
-
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
Question 6
Question
Stress depends on the type of material being tested
Answer
- True
- False
Question 7
Question
Definition of Ultimate Tensile Strength (UTS)
Answer
-
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
Question 8
Question
Resistance to plastic deformation or scratching or bending is...
Answer
-
hardness
-
fatigue endurance limit
-
yield strength
-
fracture toughness
Question 9
Question
the hardness of metals is tested with which test
Answer
-
brinell or rockewell
-
durometer score
Question 10
Question
the harness of polymers is tested with
Answer
-
brinell or rockewell
-
durometer score
Question 11
Question
Fatigue endurance limit does not apply to non-ferrous metals
Answer
- True
- False
Question 12
Question
For a material to be tough it needs to be what two things
Answer
-
ductile
-
durable
-
strength
-
stiff
Question 13
Question
which material has the highest modulus and density
Answer
-
steel
-
titanium
-
aluminum
Question 14
Question
Aluminum has a modulus and density that is [blank_start]1/3[blank_end] the value of steel (ratio)
Answer
-
1/3
Question 15
Question
the equation for stress (in variable form) is [blank_start]F/A[blank_end]
Answer
-
F/A
Question 16
Question
Pure shear stress is generally 1/2 of what?
Answer
-
normal stress
-
torsional shear stress
-
tensile strength
-
flexural stress
Question 17
Question
Equation for flexural normal stress
Answer
-
Mc/I
-
F/A
-
delta L/L
-
bd^3/12
Question 18
Question
In the equation Mc/I, what does the c stand for?
Answer
-
moment of inertia
-
distance from the neutral axis to the extreme fiber
-
shear stress
-
polar moment of inertia
Question 19
Question
Deflection is dependent on material type
Answer
- True
- False
Question 20
Question
What is the equation for deflection?
Answer
-
FL/AI
-
FL/AE
-
delta L/L
-
I/c
Question 21
Question
What is the equation for Factor of safety
Answer
-
stress allowable/stress actual
-
stress actual/stress allowable
Question 22
Question
In the factor of safety equation, which stress value is higher?
Answer
-
stress allowable
-
stress actual
Question 23
Question
What material can not be heat treated, only cold worked?
Answer
-
400 SS
-
Aluminum
-
Steel
-
300 SS
-
Titanium
Question 24
Question
Cyclic loading can cause a material to fail at stress values higher than the yield stress
Answer
- True
- False
Question 25
Question
What material does not have an endurance limit
Answer
-
steel
-
aluminum
Question 26
Question
A material is not likely to fail between the [blank_start]endurance limit[blank_end] line and the yield stress line
Answer
-
endurance limit
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