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Lowe POE Final Exam

Total questions: 125

Worksheet time: 5hrs 53mins

Name
Class
Date
1.

The unit of resistance is....

a)

Volts

b)

Siemens

c)

Ohms

d)

Amps

2.

You measure voltage..

a)

Through a resistor

b)

Across a resistor

c)

Around a resistor

d)

On a resistor

3.

You measure current..

a)

Across a resistor

b)

Through a resistor

c)

Over a resistor

d)

In a resistor

4.

Complete circuit is also known as _____________

a)

Short circuit

b)

Open Circuit

c)

Closed Circuit

d)

Finished Circuit

5.

SI unit for Reactance is ___________________.

a)

Joule

b)

Ohm

c)

Siemens

d)

Hertz

6.

SI unit for Power is ___________________.

a)

Joule

b)

Ohm

c)

Watt

d)

Volt

7.

If one bulb in series circuit is broken or removed, current still flows. The remaining bulbs do light up.

a)

True

b)

False

8.

If one bulb breaks or removed in parallel circuit, other bulbs on the circuit remain lit.

a)

True

b)

False

9.

Which engineer may design a GPS for your vehicle?

a)

mechanical engineer

b)

computer engineer

c)

electrical engineer

d)

agricultural engineer

10.

Using technological and scientific knowledge to solve practical problems is call _______________.

a)

Math

b)

Invention

c)

Innovation

d)

Engineering

11.

An ______________ engineer may evaluate the effects of global warming on food production.

a)

chemical

b)

agricultural

c)

mechanical

d)

electrical

12.

A ________________ engineer may create a robot to discover water on a planet.

a)

mechanical

b)

electrical

c)

computer

d)

chemical

13.

A model that can be tested and redesigned is called a...

a)

product

b)

prototype

c)

process

14.
A systematic, creative, iterative process for addressing challenges.
a)
Informed Design
b)
Design Brief
c)
Engineering Design
15.
A limit imposed on a design solution.
a)
Constraint
b)
Specification
c)
Risk/Benefit Trade-Off
16.

Definition Of Force

a)

Force is a gravitational force upon an object  resulting interaction with  another object.

b)

Force is a action upon an object  resulting from the object’s to move

c)

Force is a push or pull upon an object  resulting from the object’s interaction with  another object.

d)

Force is a action on object  resulting the object’s to have force

17.

SI Unit for force

a)

Newton (N) @ kgms-2

b)

Meter(M)/

Second(S)

c)

Joule

d)

Meter(M)/

Second(S)-2

18.

Correct example of Force

a)

A box of book

b)

Climbing a mountain

c)

Walking down a street

d)

Pushing a trolley in supermarket

19.

What is weight?

a)

The force of object on the gravity

b)

The force of gravity on the object

c)

The force of moving object to the object force

d)

The gravitational force of gravity on the object

20.

What is ABET, Inc?

a)

A category of engineering.

b)

Absolute Biological Engineering Technology.

c)

A recognized accreditor for college and university programs in applied science, computing, engineering, and technology.

d)

A recognized accreditor for college and university programs in mathematics, statistics and probability.

21.

What is Mass?

a)

The amount of  material in an object

b)

The amount of  density in an object

c)

The amount of  force in an object

d)

The amount of  gravitational force in an object

22.

What are the 4 major categories of engineering?

a)

Mechanical, Chemical, Civil, Electrical

b)

Mechanical, Biomedical, Civil, Electronics

c)

Mechanical, Chemical, Structural, Electrical

d)

Mechanical, Biomedical, Structural, Electrical

23.

What engineering is this? Researches, develop, design, manufacture, and maintain devices that produce or consume power.

a)

Civil

b)

Electrical

c)

Chemical

d)

Mechanical

24.

Compression is ...

a)

The strength a material has to resist being pulled apart. If you glue something to the ceiling, the weight of the object tests the glue’s tensile strength.

b)

A material is in compression when its particles are being pushed together.

c)

The action of twisting one end of an object/material relative to the other end.

25.

Tension is ...

a)

The action of twisting one end of an object/material relative to the other end.

b)

The strength a material has to resist being pulled apart. If you glue something to the ceiling, the weight of the object tests the glue’s tensile strength.

c)

A material is in compression when its particles are being pushed together.

26.

Torsion is ...

a)

The strength a material has to resist being pulled apart. If you glue something to the ceiling, the weight of the object tests the glue’s tensile strength.

b)

A material is in compression when its particles are being pushed together.

c)

The action of twisting one end of an object/material relative to the other end.

27.

This type of bridge carry a combination of compression and tension forces and is less bulky (heavy) than other types of bridges.

a)

Beam Bridge

b)

Arc Bridge

c)

Truss Bridge

d)

Cable-stayed Bridge

28.

A simple machine made of a plank and fulcrum

a)

pulley

b)

lever

c)

wheel & axel

d)

Incline plane

e)

wedge

29.

What simple machine is in this image

a)

Wedge

b)

Lever

c)

screw

d)

wheel and axel

e)

Incline plane

30.

an energy resource that takes millions of years to form from the remains of plants and animals, such a coal, oil, and natural gas

a)

nonrenewable

b)

renewable

31.

the splitting of uranium atoms to release energy.

a)

geothermal

b)

wind

c)

nuclear

d)

natural gas

32.

turbines harness the movement of air and convert it to useable energy

a)

wind

b)

biomass

c)

natural gas

d)

hydropower

33.
All of the following store chemical energy except
a)
match
b)
battery
c)
fossil fuels
d)
electricity
34.

Calculate the energy released from a battery in a hand vacuum cleaner that was switched on for 45 s. The voltage drop was 6 V and the current was 0.30 A.

a)

35 J

b)

81 J

c)

42 J

d)

82 W

35.

Calculate the power rating of an electric toaster that uses 210 000 J while toasting bread for 140 s

a)

1500 J

b)

1200 W

c)

1500 W

d)

1300 J

36.

Calculate the percent efficiency of an electric motor that uses 15 000 J of energy to produce

11 500 J of useful movement.

a)

76.6%

b)

82.3%

c)

75.4%

d)

23.3%

37.

Calculate the cost of operating a heater of 1.75kw for 20 hours at rate of $0.13 per kwh?

a)

$6.75

b)

$4.55

c)

$53.43

d)

$45.53

38.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
39.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
40.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
41.

Resistor symbol is

a)
b)
c)
d)
42.

Potentiometer symbol is

a)
b)
c)
d)
43.

LED positive is

a)

Longer pin

b)

Shorter pin

44.
water is a______?
a)
conductor
b)
insulator
45.
wood is a _____?
a)
conductor
b)
insulator
46.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
47.
When you flip a light switch on and off you are closing and opening a circuit.
a)
true
b)
false
48.
Would would best complete this circuit?
a)
A wire
b)
A switch
c)
A battery
d)
A light bulb
49.
What kind of circuit is this?
a)
series
b)
parallel
50.
What type of circuit is show in the image?
a)
Series Circuit
b)
Parallel Circuit
51.

What is the centroid of the following object?

a)

X=2 in, Y=1 in

b)

X=1 in, Y=2 in

c)

X=4 in, Y=2 in

d)

X=2 in, Y=4 in

52.

What is the centroid of the following object?

a)

X=1 in, Y=2 in

b)

X=3 in, Y=1.5 in

c)

X=2 in, Y=1 in

d)

X=1.5 in, Y=3 in

53.

What is the centroid of the following object?

a)

X=2.5 in, Y=2.5 in

b)

X=5 in, Y=5 in

c)

X=1.06 in, Y=2.5 in

d)

X=1.67 in, Y=1.67 in

54.

What is the centroid of this object?

a)

x = 2.71 in, y = 2.71 in

b)

x = 3 in, y = 3 in

c)

x = 2.75 in, y = 2.75 in

d)

x = 3.14 in, y = 3.14 in

55.

If given a complex shape how do you find the true centroid?

a)

Break it into smaller shapes and add the centroid locations together

b)

Break it into smaller shapes and average the centroid locations

c)

Break it into large shapes and subtract the smallest from the largest

d)

Multiply the centroid locations with the shape area, add the products up, divide by total shape area

56.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
57.
Name the missing force...
a)
applied force
b)
weight force
c)
tension force
d)
drag
58.

Whenever an object is moving, there is always this force opposing the motion:

a)

inertia

b)

momentum

c)

friction

d)

applied force

59.

This object would be moving (pick all that are correct):

a)

up

b)

down

c)

left

d)

right

60.

The down-arrow in this diagram is most-likely:

a)

gravity

b)

normal

c)

a push or pull

d)

friction

61.

What forces are on a leopard laying on a log?

a)

Fg & Fapp

b)

Fb & Fg

c)

Fg & FN

d)

Ff & FN

62.
Which one is balanced?
a)
top
b)
bottom
c)
both
63.

A mathematical property of a cross section (measured in inches) that gives important information about how that cross-sectional area is distributed about a centroidal axis:

a)

Centroid Principles

b)

Moment of Inertia

c)

Modulus of Elasticity

d)

Beam Deflection

64.

The ratio of the increment of some specified form of stress to the increment of some specified form of strain. Also known as coefficient of elasticity, elasticity modulus, elastic modulus:

a)

Centroid Principles

b)

Moment of Inertia

c)

Modulus of Elasticity

d)

Beam Deflection

65.

Beam A and B are the same material and same dimensions. What distinguishes beam A from beam B?

a)

Beam A will have a greater resistance to bending because it has a lower moment of inertia.

b)

Beam A will have a greater resistance to bending because it has a higher moment of inertia.

c)

Beam B will have a greater resistance to bending because it has a lower moment of inertia.

d)

Beam B will have a greater resistance to bending because it has a higher moment of inertia.

66.

Correct formula for calculating beam deflection:

a)
b)
c)
d)
67.

In the formula above, how to do read the 'Σ' symbol?

a)

Average of

b)

Product of

c)

Sine of 

d)

Sum of

68.

Given the information above, calculate the beam deflection for Beam A:

a)

.12 inches

b)

1.39 inches

c)

.53 inches

d)

.24 inches

69.

Flashback: Second Law of Thermodynamics

a)

Thermal energy can change form and location, but it cannot be created or destroyed

b)

Law of energy conservation applied to a thermal system

c)

Thermal energy flows from hot to cold

d)

The transfer of thermal energy by movement of fluid (liquid or gas)

70.

Flash-forward: soh cah toa

a)

The three ratios for electronic circuits

b)

a phrase to remember the three trigonometric functions

c)

Relationships of three types of trusses

d)

Names of the three blind mice

71.

Flashback: Thermal Energy Transfer Equation

a)
b)
c)
d)
72.

Compare the maximum deflection distance for two boards made of yellow pine with a cross-section of 3 in. by 5 in.


If the two boards experience 1000 N point load at the center of the beam, but one board is 3 times longer, then which of the following is true?

a)

The longer board deflects 27 times more.

b)

The longer board deflects 9 times more.

c)

The longer board deflects 3 times more.

d)

The shorter board deflects 8 times more.

73.

Using the stress-strain curves provided, which of the two materials experiences more plastic deformation?

a)

Material #1

b)

Material #2

74.

Using the stress-strain curves provided above, which of the two materials shown is more brittle?

a)

Material #1

b)

Material #2

75.

What does the Moment of Inertia describe?

a)

An objects stiffness related to its shape

b)

An objects stiffness related to its chemical properties

c)

An objects rotation because of inertia

d)

An objects rotation because of force

76.

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

77.

Why does a beam's orientation change it's Moment of Inertia? (Choose the BEST option)

a)

You are changing what the measured Height is, which heavily impacts Inertia Calculations

b)

You are changing the measured Base, which heavily impacts Inertia Calculations

c)

You are changing the beam's length, which heavily impacts Inertia Calculations

d)

Beam orientation doesn't matter, the Moment of Inertia stays the same.

78.

How many members are seen in the truss bridge pictured here?

a)

2

b)

3

c)

4

d)

5

79.

A roller support moves with forces applied to the truss bridge. How many reactions does roller support have?

a)

1

b)

2

c)

3

d)

None

80.

A pinned support, seen on the left side in this truss bridge, has how many reactions?

a)

1

b)

2

c)

3

d)

None

81.

How many joints are seen in the truss bridge pictured here?

a)

2

b)

3

c)

4

d)

5

82.

Considering the method of joints, is the truss bridge shown here statically determinate or statically indeterminate?

a)

Statically determinate

b)

Statically indeterminate

83.

This bridge contains one pinned support and one roller support. How many reactions doe s this bridge have?

a)

1

b)

2

c)

3

d)

4

84.

How many joints are seen in this bridge?

a)

1

b)

2

c)

3

d)

5

85.

How many members are seen in the this truss bridge?

a)

8

b)

7

c)

6

d)

5

86.
Which is the strongest shape used in engineering?
a)
Triangle
b)
Square
c)
Circle
d)
Rectangle
87.
What is the name for the entire length of a bridge?
a)
span
b)
pier
c)
abutment
d)
cable
88.

Considering the methods of joints, is this bridge statically determinate or statically indeterminate?

a)

Statically Determinate

b)

Statically Indeterminate

89.

The forces that pulls a material apart is...

a)

compression

b)

tension

c)

torsion

d)

shear

90.

The force of squeezing a material together is...

a)

compression

b)

tension

c)

torsion

d)

bending

91.
A slower particle has a lower energy than an identical, faster particle.
a)
True
b)
False
92.
The transfer of thermal energy between objects of different temperatures is called...
a)
temperature
b)
heat
c)
internal energy
d)
none of these
93.
It is possible to reach absolute zero
a)
true
b)
false
94.
Heat travels from the sun to the earth by the process of...
a)
conduction
b)
convection
c)
radiation
d)
insulation
95.
Thermal energy always moves:
a)
From a high temperature object to a lower temperature object.
b)
From a lower temperature object to a higher temperature object.
c)
From an object with lower kinetic energy to an object with higher kinetic energy.
d)
From an object of higher mass to an object of lower mass.
96.
A substance with a high specific heat:
a)
Is always extremely hot.
b)
Requires a lot of energy to become hot.
c)
Is not heavy.
d)
Does not requires a lot of energy to become hot.
97.
The second  law of thermodynamics states that entropy of a system  tends to ______________. 
a)
increase
b)
decrease
c)
stay constant
d)
fluctuate wildly
98.
The temperature of a glass of cold water will eventually...
a)
Match the temperature of the surrounding environment.
b)
Always be colder than the surrounding environment.
c)
Become warmer than the surrounding environment.
d)
Never change temperature.
99.
The first law of thermodynamics states that energy is
a)
created
b)
destroyed
c)
conserved
d)
created and destroyed
100.
Which law of thermodynamics states that absolute zero cannot be reached?
a)
1st
b)
2nd
c)
3rd
101.
Which state of H2O  has the greatest entropy?
a)
Ice
b)
Water
c)
Vapor
102.
Which statement is true about the ENTROPY?
a)
Entropy refers to DISORDER, the unusable energy that escapes a system.
b)
Entropy refers to the balance of temperature among two or more systems.
c)
Entropy refers to the average kinetic energy of the molecules.
d)
Entropy refers to the inability to destroy or create energy. 
103.
As a system becomes more disordered, entropy
a)
remains the same
b)
increases
c)
decreases
d)
cannot be determined
104.

Which is an example of decreasing entropy in a closed system?

a)

Boiling water

b)

Freezing water

c)

Cells in a body coming together

d)

Ice melting

105.
Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate the
a)
first law of thermodynamics.
b)
second law of thermodynamics.
c)
both of the above
d)
none of the above
106.

The 1st law of Thermodynamics

a)

Energy can not be created or destroyed. It just changes forms.

b)

Energy can only be created by the sun

c)

Some energy is lost to the environment.

107.

2nd law of thermodynamics

a)

Every time energy changes form, some of it is lost to the environment

b)

Energy can't be created or destroyed

c)

All energy generates heat

108.

Conductor

a)

A material that thermal energy travels through easily

b)

A material that energy does NOT transfer through easily

c)

Energy that travels in the form of electromagnetic waves

109.

Convection

a)

The transfer of thermal energy through liquids and gases

b)

The transfer of thermal energy through solids

c)

The transfer of thermal energy as electromagnetic waves

110.
How much work is produced when 350 N is used to move a car 5 m (W=Fd)?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
111.

What is effort (input) force?

a)

the force one exerts on a machine

b)

the force which an effort force must overcome in order to do work on an object via a simple machine.

c)

the force the machine exerts on a object

d)

the output work times the input distance

112.
If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?
a)
2N
b)
5N
c)
10N
d)
15N
113.

A box of weight W is lifted by a force F using a lever as shown below.

What is the mechanical advantage of the lever (MA=Input Distance/Output Distance)?

a)

0.5

b)

2

c)

3

d)

6

114.
The amount by which a machine multiplies input force is known as the 
a)
work.
b)
power.
c)
output force.
d)
mechanical advantage.
115.
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
a)
0
b)
2
c)
4
d)
8
116.
A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?
a)
6 m
b)
16 m 
c)
80 m 
d)
1536 m 
117.

How much effort would it take to lift Lever A?

a)

60 N

b)

50N

c)

40 N

d)

30 N

118.
How much work is produced when 350 N is used to move a car 5 m (W=Fd)?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
119.

A simple gear train is composed of three gears. Gear A is the driver and has 60 teeth, gear B has 40 teeth, and gear c has 15 teeth. If the output at gear C is 300 RPM, what is the input torque at gear A?

a)

600 RPM

b)

1200 RPM

c)

75 RPM

d)

2400 RPM

120.

If the small gear is driving the large gear, what is happening to the torque (TRACCION)?

a)

Torque is increasing

b)

Torque is decreasing

c)

Torque remains constant

d)

Not enough information to answer the question

121.

Which gear train would you use to apply the force necessary to ride up a hill?

a)

A

b)

B

122.
A lever and fulcrum are used to lift a fallen tree, which has a weight of 480 N. If the lever has a mechanical advantage of 5.5, what is the input force that will begin lifting the tree off the ground?
a)
5.5 N
b)
40.7 N
c)
87.3 N
d)
2640 N
123.
The efficiency of a machine can be increased by reducing __________________________. 
a)
effort
b)
resistance friction
c)
fulcrum
d)
friction
124.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
125.
What is the measure of how much input work is changed into output work?
a)
resistance force
b)
efficiency
c)
mechanical advantage
d)
effort force

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