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POE Unit 4 Test

Total questions: 40

Worksheet time: 4hrs 36mins

Name
Class
Date
1.

A bridge member that is in tension is...

a)

being stretched

b)

being squeezed

2.

A bridge member that is in compression is...

a)

being stretched

b)

being squeezed

3.

Given that strain = (amount of stretch)/(original length), what is the strain on a piece of metal that was stretched 0.02in. and was originally 1.5in. long?

a)

0.013

b)

75

c)

0.03

d)

0.133

4.

What is the equation for calculating stress?

a)

stress = load/area

b)

stress = area/load

c)

stress = deformation/length

d)

stress = length/deformation

5.

When calculating the strain in a wire, the Δ L refers to the

a)

length of the wire.

b)

the modulus of elasticity of the material.

c)

the definition of the wire.

d)

the change in length of the wire.

6.
Once the material goes past the elastic limit it can never go back to its original shape.
a)
True
b)
False
7.

Point C represents what on the stress-strain curve?

a)

Elastic Limit

b)

Ultimate Tensile Strength

c)

Necking

d)

Failure

8.

Which measurement impacts an objects Moment of Inertia more heavily?

a)

Base

b)

Height

c)

Width

d)

Depth

9.

What does the Modulus of Elasticity describe?

a)

An objects stiffness based on its shape

b)

An objects stiffness based on its chemical properties

c)

An objects rotation because of inertia

d)

An objects rotation because of force

10.

Using the equation for the moment of inertia above, find the base of a piece of wood that has moment of inertia 21 and height 5.5.

a)

1.5

b)

2

c)

1

d)

15

11.

A LOW modulus of elasticity means...

a)

a greater resistance to deformation

b)

a lower resistance to deformation

c)

a greater resistance to strain

d)

a lower resistance to strain

12.
Name the missing force...
a)
applied force
b)
weight force
c)
tension force
d)
drag
13.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
14.

When assessing joint D how many reaction forces will be acting upon it?

a)

0

b)

1

c)

2

d)

3

15.

When assessing joint A how many reaction forces will be acting upon it?

a)

0

b)

1

c)

2

d)

3

16.

Which equation is for a statically determinate structure?

a)

J = 2m + R

b)

2J = M - R

c)

2J = M + R

d)

2J = 2M + 2R

17.

Determine whether the structure shown is statically determinate

a)

Yes

b)

No

c)

Can't be determined

18.

Which of the following is the correct symbol to represent Stress?

a)

σ (Lowercase Sigma)

b)

ε (lowercase Epsilon)

c)

δ (Lowercase Delta)

d)

ψ (Lowercase Psi)

19.
Which color curve represents the material with the most strength?
a)
red
b)
green
c)
blue
20.

The 500 lb force causes a ____ moment about point A.

a)

positive

b)

negative

c)

maximum

d)

neutral

21.

Consider the following forces, what additional force is needed to keep the block in static equilibrium?

a)

9N force pointing up

b)

9N force pointing down

c)

16N force pointing down

d)

16N force pointing up

22.

Determine the Moment about point O.

a)

21 kN⋅m CCW

b)

21 kN⋅m CW

c)

28 kN⋅m CCW

d)

28 kN⋅m CW

e)

14 kN⋅m CCW

23.
Match description with free-body diagram.
a)
A book is at rest on a tabletop.
b)
A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling. Diagram the forces acting on the combination of gymnast and bar.
c)
An egg is free-falling from a nest in a tree. Neglect air resistance.
d)
A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.
24.

Which diagram has the direction of the reaction forces correctly labeled, assuming all force magnitudes are correct in the given options?

a)

b)

c)

d)

25.

If this truss is stable, the sum of the forces in the vertical direction

a)

equals 500 lb.

b)

equals 250 lb.

c)

equals 0.

d)

is unknown at this time.

26.

Which of the materials shown is most brittle?

a)

Strong cast iron

b)

pure aluminium

c)

mild steel

d)

aluminium alloy

e)

pure aluminium

27.

Which nonrenewable energy source is extracted from the ground and used primarily for fuel in vehicles?

a)

Coal

b)

Natural Gas

c)

Petroleum

d)

Uranium

28.

Which renewable energy source uses sunlight to generate power?

a)

Geothermal

b)

Biomass

c)

Wind

d)

Solar

29.

Which renewable energy source relies on the movement of air?

a)

Wind

b)

Solar

c)

Hydropower

d)

Biomass

30.

Which renewable energy source is derived from plant material?

a)

Hydropower

b)

Geothermal

c)

Biomass

d)

Solar

31.

Which renewable energy source uses the heat from the Earth's interior?

a)

Biomass

b)

Geothermal

c)

Wind

d)

Solar

32.

What Engineer Develops roads and highways?

a)

Water resources engineer

b)

Structural engineer

c)

Transportation engineer

d)

Geotechnical engineer

33.

What Engineer Designs buildings and bridges?

a)

Water resources engineer

b)

Structural engineer

c)

Transportation engineer

d)

Geotechnical engineer

34.
Question Image

Match the following

a)

1

1.

Approach

b)

9

2.

Major Street

c)

12

3.

Channelizing Island

d)

4

4.

Crosswalk

e)

7

5.

Minor Street

35.

What is the name of this intersection type?

a)

Simple

b)

Flared with additional turn lanes

c)

Roundabout

d)

Channelized

36.

What is the name of this intersection type?

a)

Simple

b)

Flared with additional turn lanes

c)

Roundabout

d)

Channelized

37.

What is the name of this intersection type?

a)

Simple

b)

Flared with additional turn lanes

c)

Roundabout

d)

Channelized

38.

What is the name of this intersection type?

a)

Simple

b)

Flared with additional turn lanes

c)

Roundabout

d)

Channelized

39.

What does CLV stand for?

a)

Cars Leaving Volume

b)

Changing Lane Vehicle

c)

Conflicting Lane Vehicle

d)

Critical Lane Volume

40.

What is the definition of CLV?

a)

total number of conflicting vehicle movements

b)

total volume of cars passing through an intersection

c)

total number of vehicles turning in an intersection

d)

total vehicles changing lanes

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