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PLTW EES FINAL STUDY GUIDE

Total questions: 80

Worksheet time: 3hrs 6mins

Name
Class
Date
1.

The study of values, issues, and decisions that are involved with the work of engineers is known as:

a)

conscientious.

b)

engineering ethics.

c)

systems thinker.

d)

efficient.

2.

Engineers need to ask two of the following questions to extend human capabilities. (09-17 Edpuzzle)

a)

How can we prioritize good?

b)

What is good for humans?

c)

How is the system efficient?

d)

What is good?

3.

Select the American Society of Civil Engineers Code of Ethics distinct principles from the following. (09-17 Edpuzzle)

a)

Service with competence.

b)

Reputation by merit.

c)

Continue professional development.

d)

Consider system designs and moral reasons.

4.

The one factor that a scientist changes during an experiment. (It affects the results of the experiment). (10-07 Act. 1.3.2 Experimental)

a)

Dependent Variable

b)

Independent Variable

c)

Controlled Variable

5.

The variable that is measured. It is the result of the experiment. (10-07 Act. 1.3.2 Experimental)

a)

Controlled Variable

b)

Independent Variable

c)

Dependent Variable

6.

The factors stay the same throughout the experiment. (10-07 Act. 1.3.2 Experimental)

a)

Constant

b)

Independent Variable

c)

Dependent Variable

7.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable? (10-07 Act. 1.3.2 Experimental)

a)

Dropping from the same height

b)

Amount of time it takes the helicopter to hit the floor

c)

Wing Length

d)

Dropping the same way

8.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the dependent variable? (10-07 Act. 1.3.2 Experimental)

a)

Amount of time it takes the helicopter to hit the floor

b)

Dropping the same way

c)

Wing Length

d)

Dropping from the same height

9.

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.

What is the dependent variable? (10-07 Act. 1.3.2 Experimental)

a)

The growth of the plant

b)

Using the same type of plant

c)

Each plant was placed in a 10-inch pot

d)

One plant is in the sunlight and the other is under a box

10.

Based on the tensile test graph, B represents the _ of the material.

a)

stress

b)

fracture point

c)

strain

d)

elasticity range

11.

(10-15 Act. 1.3.3 Notes)

A "complete recovery" occurs during this phase when the material regains its original length when the stress is removed:

a)

elastic deformation.

b)

flow region.

c)

material hardening.

d)

necking.

12.

(10-15 Act. 1.3.3 Notes)

After these points are exceeded even if the forces are removed immediately the material does not regain its original properties during this phase:

a)

elastic deformation.

b)

flow region.

c)

material hardening.

d)

necking.

13.

(10-15 Act. 1.3.3 Notes)

During this phase, if the stress is increased further an increasing number of upright dislocations form in the crystal lattice prevents the movement of the previous still sliding dislocations. At the same time, the stress in the crystal lattice continues to increase which causes hardening of the material. Here the metal becomes stronger as the strain increases.

a)

elastic deformation.

b)

flow region.

c)

material hardening.

d)

necking.

14.

(10-15 Act. 1.3.3 Notes)

In the crystal lattice of the metal bar, so many dislocations have occurred that they can no longer lead to hardening but instead contribute to the formation of voids or cavities. The voids also cause the material cross-section to reduce until it can no longer withstand the stress at point B, better known as the:

a)

elasticity range.

b)

stress

c)

strain

d)

fracture point

15.

10-15 Act. 1.3.3 Notes

As an engineer for Graco, you have been assigned to design a baby bottle safe, durable, and dishwasher friendly for babies 6-12 months. Based on the tensile test results, explain the plastic material you would select to manufacture your innovation.

4 lines
16.

(10-14 Calculate Volume)

What is the volume of this figure?

a)

900 ft3

b)

97 ft3

c)

90 ft3

d)

87 ft3

17.

(10-14 Calculate Volume)

What is the volume of this figure?

a)

230 cubic inches

b)

168 cubic inches

c)

132 cubic inches

d)

145 cubic inches

18.

(10-14 Calculate Volume)

What is the volume of this figure?

a)

72 unit3

b)

1.5unit

c)

27 unit2

d)

27unit3

19.

(10-19 Edpuzzle: Constraints)

Identified limitations to the design of a product or system are known as:

a)

criteria.

b)

trade-offs.

c)

constraints.

d)

efficiency.

20.

(10-19 Edpuzzle: Constraints)

Time, budget, and safety are almost always considered to be:

Hint: The company benefits from them to earn a profit while providing a quality product.

a)

criteria.

b)

trade-offs.

c)

constraints.

d)

efficiency.

21.

(10-19 Edpuzzle: Constraints)

Identified elements and/or features of a product or system are known as:

Hint: Customers set the standards based on their needs, wants, and desires for the system (product).

a)

constraints.

b)

trade-offs.

c)

criteria.

d)

efficiency.

22.

(10-19 Edpuzzle: Constraints)

A constraint that is concerned with cost and must be considered when designing is:

a)

optimization.

b)

aesthetics.

c)

economical.

d)

maintenance.

23.

The retail package is the basic unit in unit loading.

a)

weight

b)

volume

c)

weight per volume

d)

fragility

24.

The amount of matter in an object:

a)

weight.

b)

circumference.

c)

mass.

d)

volume.

25.

It is affected by gravity:

a)

mass.

b)

weight.

c)

volume.

d)

circumference.

26.

What is the step in the Engineering Design Process where you identify a problem or need that exists?

a)

Plan

b)

Ask

c)

Imagine

d)

Create

27.

During which step of the Engineering Design Process do you experiment with the prototype under controlled conditions and collect /record data?

a)

Imagine

b)

Improve

c)

Plan

d)

Test and Evaluate

28.

During which step of the Engineering Design Process would the specific constraints or requirements of the challenge be identified?

a)

Ask

b)

Plan

c)

Create

d)

Improve

29.

An emergency-equipment company makes warning-signal flares. The company wants to redesign a flare so that it produces light for a longer period of time.

After the company thinks of ideas, what is the next step in the design process?

a)

Build a prototype

b)

Decide on the best solution

c)

Identify the criteria and constraints

d)

Test a model

30.

Where do engineers store all their ideas?

a)

Online application

b)

3-ring binder

c)

bound notebook

d)

sticky notes

31.

Choose the correct order for the steps of the Engineering Design Process.

a)

Define the Problem, Brainstorm Possible Solutions, Explore Solutions, Generate a Solution, Test and Evaluate

b)

Define the Problem, Brainstorm Possible Solutions, Explore Solutions, Test and Evaluate, Generate a Solution

c)

Define the Problem, Brainstorm Possible Solutions, Generate a Solution, Explore Solutions, Test and Evaluate

d)

Explore Solutions, Define the Problem, Brainstorm Possible Solutions, Generate a Solution, Test and Evaluate

32.

If your initial design doesn't fully solve the problem or meet the challenge, you must go back and revise your plan. This is part of which step in the Design Process?

a)

Ask

b)

Improve

c)

Create

d)

Imagine

33.

Engineers plan on developing a new drill for use on oil rigs. What should the engineers do first in order to develop the new drill?

a)

Build a prototype of the new drill

b)

Determine the materials needed to build the new drill

c)

Test existing technology

d)

Conduct research on features for a new drill

34.

A small group of people starts sharing ideas. Some ideas may seem silly, but all suggestions are written down for further consideration. This activity is part of which step of the Engineering Design Process?

a)

Imagine

b)

Create

c)

Ask

d)

Plan

35.

A team of engineers is asked to design a scooter for less than $30. They decide that they will only use recycled materials. Which of the following is the team’s constraint?

a)

Made out of recycled materials

b)

Designed to appeal to kids

c)

Cost less than $30 to produce

36.

What size resistor would produce a 3 Amps current flow with a 12 emf?

a)

3 Ohms

b)

4 Ohms

c)

12 Ohms

d)

1 Ohm

37.

What is current measured in?

a)

Ω (Ohms)

b)

Electrical pressure (Volts)

c)

A (Amps)

d)

W (Watts)

38.

What is Resistance?

a)

The ability to reduce the flow of electrons

b)

The flow of electrons

c)

Electric potential difference

d)

The flow of protons

39.

The electricity that flows in a closed path is called a:

a)

path.

b)

current.

c)

light.

d)

circuit.

40.

What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?

a)

2.5 V

b)

10 V

c)

25 V

d)

0.4 V

41.

If the voltage is increased and the resistance stays the same, the current will:

a)

decrease.

b)

stay the same.

c)

increase.

42.

If the voltage stays the same and Resistance is increased, the current will:

a)

decrease.

b)

remain the same.

c)

increase.

43.

If the battery produced 12.6 Volts what would be the current flow for a 6 Ohm resistor?

a)

2.1 Amps

b)

1.71 Amps

c)

2.4 Amps

d)

15 Amps

44.

The first two color bands are........

a)

Percentage

b)

Digits

c)

Tolerance

d)

Size

45.

The third color band is the _.

a)

digit

b)

multiplier.

c)

tolerance.

d)

percentage.

46.

The fourth color band represents the _.

a)

digit

b)

tolerance.

c)

multiplier.

47.

The gold color band refers to__________tolerance.

a)

+ / - 5%

b)

+ / - 20%

c)

+ / - 10%

d)

zero

48.

If the fourth color band old is gold on a 100 ohm resistor. The range for the tolerance is between_____and ______

a)

- 95% and + 110%

b)

+ / - 5% of 1K

c)

-80% and + 120%

d)

- 95% and + 105%

49.

What is the median (average) value for the following resistor?

a)

550 Ohms

b)

220 Ohms

c)

110 Ohms

d)

222 Ohms

50.

Where did the name "breadboard" come from?

a)

It sounded like a fun name.

b)

They used to wire circuits on the board that was used to cut bread

c)

It is made of bread

d)

It is in the shape of a piece of bread

51.

What will happen if you forget to include one of these in the circuit?

a)

The current will go too fast

b)

The LED will burn out

c)

The circuit will overload

52.

What physical quantity does the voltmeter measures?

a)

Current

b)

Power

c)

Resistance

d)

Voltage

53.

What physical quantity does ammeter measures?

a)

Voltage

b)

Current

c)

Power

d)

Resistance

54.

A tool that measures voltage, current, resistance, and continuity is called a:

a)

ammeter.

b)

voltmeter.

c)

multimeter.

55.

On a multimeter, the black probe is connected to the __.

a)

Amperage

b)

COM (which is positive)

c)

COM (which is negative)

d)

Continuity

56.

What type of measurement requires the component to be isolated and power removed?

a)

Currency

b)

Current

c)

Voltage

d)

Resistance

57.

The multimeter should always be set ______ than/with the indicated value.

a)

lower

b)

higher

c)

twice

58.

What will appear to the display if the probes are connected in reverse?

a)

A positive reading

b)

A "twice the value" reading

c)

An infinite reading

d)

A negative reading

59.

What scale in the multimeter will you choose when you are to measure the voltage of a power outlet?

a)

ACV Scale

b)

AC Current Scale

c)

DCV Scale

d)

Resistance Scale

60.

The place where a lever pivots is called the _______.

a)

center

b)

pivot point

c)

fulcrum

61.

What kind of lever is this?

a)

Third Class Lever

b)

Second Class Lever

c)

First Class Lever

62.

A see-saw is an example of a _-class lever.

a)

1st

b)

2nd

c)

3rd

63.

A wheelbarrow is an example of a _-class lever.

a)

1st

b)

2nd

c)

3rd

64.
a)

0.987

b)

4.887

c)

4.987

d)

0.887

65.

a)

1.433

b)

1.500

c)

1.543

d)

1.532

66.

a)

2.151

b)

.0515

c)

2.515

d)

0.151

67.

a)

0.622

b)

5.662

c)

5.622

d)

0.662

68.

a)

0.553

b)

9.066

c)

1.066

d)

0.966

69.

Which of the two circuits would have the brightest bulbs?

a)

A

b)

B

70.

Does this statement best describe a parallel or a series circuit?

When more light bulbs are added they all remain bright.

a)

Parallel circuit

b)

Series circuit

71.
a)

Series circuit - Bulbs are off

b)

Series circuit - Bulbs are lit

c)

Parallel circuit - Bulbs are lit

d)

Parallel circuit - Bulbs are off

72.

This circuit does not work because _.

a)

the bulbs are not connected properly.

b)

the single cell is not powerful enough.

c)

there is a short circuit.

d)

there is a break in the circuit.

73.
a)

open parallel

b)

open series

c)

closed parallel

d)

closed series

74.

What is the part within the red boxes called?

a)

Input buttons

b)

CPU

c)

Ground

d)

Micro-usb connector

75.

The "On Shake" Microbit command relies on the:

a)

LEDs

b)

accelerometer

c)

the input buttons

d)

compass

76.

How many variables have been used in this program?

a)

2

b)

1

c)

3

d)

4

77.

What name is given to this programming editor that lets you code the Microbit?

a)

Javascript

b)

Python

c)

Block editor

d)

C++

78.

The current going through the 45-ohm resistor is

a)

0.05 amps

b)

0.1 amps

c)

0.2 amps

d)

5 amps

79.

The voltage dropped across the 300-ohm resistor is

a)

6V

b)

2 V

c)

9 V

d)

3 V

80.

What will happen if one light bulb is removed from this circuit?

a)

The other bulbs will stay on

b)

The battery will become stronger.

c)

The other bulbs will go out.

d)

The other bulbs will get dimmer.