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Quiz by Nicole Saville, created more than 1 year ago

Quiz on Materials , created by Nicole Saville on 13/10/2014.

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	Created by Nicole Saville about 10 years ago

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1456583

quiz

2016-03-31T00:31:16Z

Materials

Materials

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Question 1 of 23

2

What is Hooke's Law?

Select one or more of the following:

F=kx
k=Fx
The extension of an elastic body is proportional to the force that causes it (within its elastic limit)
The force on a body is proportional to the extension caused once past the elastic limit
Force is proportional to strain

Explanation

Question 2 of 23

1

In Hooke's law, what is k?

Select one of the following:

The spring constant
Extension
The length

Explanation

Question 3 of 23

1

How do you find the spring constant from a Force- extension graph?

Select one of the following:

1
-----------
gradient
gradient
area underneath

Explanation

Question 4 of 23

1

What does the area underneath a force-extension graph tell you?

Select one of the following:

The strain energy
The strain
The stress
The spring constant
Nothing

Explanation

Question 5 of 23

2

What is strain energy?

Select one or more of the following:

Energy stored in deformed materials
Work done in producing an extension
The maximum force a material can take before breaking
The point at which a material reaches its elastic limit

Explanation

Question 6 of 23

1

Ultimate tensile strength is...

Select one of the following:

the maximum tensile force that can be applied to a material before it breaks
the energy stored in a material when it's stretched to its limit
the maximum stress of a material

Explanation

Question 7 of 23

1

tensile force is a force applied to create a stretch

Select one of the following:

True
False

Explanation

Question 8 of 23

4

Stress =

Select one or more of the following:

force/area
force x area
force applied per unit cross sectional area
measured in Pa
measured in Nm^-2
the fractional change in length under load

Explanation

Question 9 of 23

1

Fractional change in length under load =

Select one of the following:

Stress
Strain
Young modulus
Strain energy

Explanation

Question 10 of 23

1

Strain is measured in N/m

Select one of the following:

True
False

Explanation

Question 11 of 23

1

extension/length =

Select one of the following:

stress
strain
young modulus

Explanation

Question 12 of 23

1

What's the effective spring constant of springs in parallel?

Select one of the following:

k1 + k2
1/K1 + 1/K2
k1 x k2

Explanation

Question 13 of 23

1

Which is in parallel and which is in series (top or bottom)?

Select one of the following:

top - series
bottom - parallel
top - parallel
bottom - series

Explanation

Question 14 of 23

1

How do you find the effective spring constant of two springs in series?

Select one of the following:

1/K = 1/k1 + 1/k2
1/k = k1 x k2
k = k1 + k2

Explanation

Question 15 of 23

2

What is a ductile material?

Select one or more of the following:

materials that have a large plastic region and can therefore be drawn into wires
Materials that have a very small elastic limit and therefore break easily
Materials that are very stretchy

Explanation

Question 16 of 23

1

Brittle materials distort very little and fracture beyond their elastic limit

Select one of the following:

True
False

Explanation

Question 17 of 23

1

What material is this a graph showing?

Select one of the following:

brittle material
ductile material
elastic material
polymeric material

Explanation

Question 18 of 23

2

What's the equation for strain energy?

Select one or more of the following:

E=1/2Fx
E=1/2kx^2
E=1/kx
E=kFx/2

Explanation

Question 19 of 23

4

What is the young modulus?

Select one or more of the following:

A constant for a given material
Stress/strain
Fl/Ax
the stiffness of a material
The maximum force a material can withstand before fracturing

Explanation

Question 20 of 23

1

A material with a small young modulus is stiff

Select one of the following:

True
False

Explanation

Question 21 of 23

1

On a stress-strain graph what is the yield point?

Select one of the following:

The point from which the force required to stretch a material decreases
The point from which the force required to stretch a material increases
The elastic limit

Explanation

Question 22 of 23

1

On a stress-strain graph what is the limit of proportionality?

Select one of the following:

The elastic limit, above which plastic deformation occurs
The elastic limit, above which elastic deformation occurs
The maximum force applied to a material before it breaks
The point at which a material fractures

Explanation

Question 23 of 23

1

Plastic deformation is reversible and disappears when the load is removed

Select one of the following:

True
False

Explanation

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1456583

quiz

2016-03-31T00:31:16Z

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