Quiz
Materials
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Questions in this quiz (23)
1What is Hooke's Law?
- AF=kx
- Bk=Fx
- CThe extension of an elastic body is proportional to the force that causes it (within its elastic limit)
- DThe force on a body is proportional to the extension caused once past the elastic limit
- EForce is proportional to strain
2In Hooke's law, what is k?
- AThe spring constant
- BExtension
- CThe length
3How do you find the spring constant from a Force- extension graph?
- A 1
-----------
gradient - Bgradient
- Carea underneath
- A 1
4What does the area underneath a force-extension graph tell you?
- AThe strain energy
- BThe strain
- CThe stress
- DThe spring constant
- ENothing
5What is strain energy?
- AEnergy stored in deformed materials
- BWork done in producing an extension
- CThe maximum force a material can take before breaking
- DThe point at which a material reaches its elastic limit
6Ultimate tensile strength is...
- Athe maximum tensile force that can be applied to a material before it breaks
- Bthe energy stored in a material when it's stretched to its limit
- Cthe maximum stress of a material
7tensile force is a force applied to create a stretch
- ATrue
- BFalse
8Stress =
- Aforce/area
- Bforce x area
- Cforce applied per unit cross sectional area
- Dmeasured in Pa
- Emeasured in Nm^-2
- Fthe fractional change in length under load
9Fractional change in length under load =
- AStress
- BStrain
- CYoung modulus
- DStrain energy
10Strain is measured in N/m
- ATrue
- BFalse
11extension/length =
- Astress
- Bstrain
- Cyoung modulus
12What's the effective spring constant of springs in parallel?
- Ak1 + k2
- B1/K1 + 1/K2
- Ck1 x k2
13Which is in parallel and which is in series (top or bottom)?
- Atop - series
bottom - parallel - Btop - parallel
bottom - series
- Atop - series
14How do you find the effective spring constant of two springs in series?
- A1/K = 1/k1 + 1/k2
- B1/k = k1 x k2
- Ck = k1 + k2
15What is a ductile material?
- Amaterials that have a large plastic region and can therefore be drawn into wires
- B
- C
- DMaterials that have a very small elastic limit and therefore break easily
- EMaterials that are very stretchy
16Brittle materials distort very little and fracture beyond their elastic limit
- ATrue
- BFalse
17What material is this a graph showing?
- Abrittle material
- Bductile material
- Celastic material
- Dpolymeric material
18What's the equation for strain energy?
- AE=1/2Fx
- BE=1/2kx^2
- CE=1/kx
- DE=kFx/2
19What is the young modulus?
- AA constant for a given material
- BStress/strain
- CFl/Ax
- Dthe stiffness of a material
- EThe maximum force a material can withstand before fracturing
20A material with a small young modulus is stiff
- ATrue
- BFalse
21On a stress-strain graph what is the yield point?
- AThe point from which the force required to stretch a material decreases
- BThe point from which the force required to stretch a material increases
- CThe elastic limit
22On a stress-strain graph what is the limit of proportionality?
- AThe elastic limit, above which plastic deformation occurs
- BThe elastic limit, above which elastic deformation occurs
- CThe maximum force applied to a material before it breaks
- DThe point at which a material fractures
23Plastic deformation is reversible and disappears when the load is removed
- ATrue
- BFalse
Information
- Description
- Quiz on Materials , created by Nicole Saville on 13/10/2014.
- Author
- Nicole Saville
- Language
- English
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- 18
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