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MMET 206 Test 1 Questions & Answers
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MMET 206 Test 1 Questions & Answers
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MMET 206 Test 1 Questions & AnswersModulus of toughness Correct Ans-the total area under the stress-strain curve to the point of
rupture
Stress*Strain = Correct Ans-Energy/volume
Stiffness and Strength are dependent or independent properties Correct Ans-independent
Harder material are what? Correct Ans-stronger
Stronger material is more brittle or ductile? Correct Ans-Brittle
Toughness is the combination of 2 properties? Correct Ans-Strength and ductility
Impact Resistance (Impact Test) Evaluate what? Correct Ans-Evaluating the relative impact
toughness of engineering materials
Impact Test measures what? Correct Ans-the energy absorbed by the high strain rate fracture
Impact Resistance 2 methods Correct Ans-Izod and Charpy Test
,Materials resistance to crack propagation can be determined using what? (impact test) Correct
Ans-using the noticed bar impact method
Impact Energy is Correct Ans-Potential energy loss of the pendulum hammer absorbed by the
specimen during the fracture
Impact Energy other name? Correct Ans-Notch Toughness
Impact Test is used to find what transition? Correct Ans-the ductile to brittle transition
Impact test the material needs to be cold/hot for impact resistance? Correct Ans-cold
In the ductile to brittle transition the higher the endpoint of the line the what? Correct Ans-the
higher the toughness
Creep is what? Correct Ans-the continued permanent deformation resulting for a
CONSTANT load below the yield strength
Creep happens with short or continued permanent deformation with a short or constant load,
above or below yield strength Correct Ans-Continued permanent deformation
constant load
below yield strength
, Creep is influenced by (3) Correct Ans-Magnitude of the load
The duration the load is applied
The temperature
Creep is more prominent with what? Correct Ans-elevated temperatures
Is creep time related phenomenon? Correct Ans-Yes
Materials that experience creep may what? Correct Ans-stretch and eventually fail at an
applied stress below its yield strength
Creep involves what type of materials Correct Ans-Metals, Polymers and ceramics
Viscoelasticity Correct Ans-a property of material that exhibits both liquid and solid
characteristics when undergoing deformation
Viscoelasticity = Correct Ans-viscous flow + elastic deformation
Viscosity Correct Ans-a liquid's resistance to flow
Elasticity Correct Ans-the ability of a solid material to return to its original size and shape
once a load is removed
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