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WorksheetsPLTW POE Midterm Review
Total questions: 50
Worksheet time: 50mins
What is the first step of the engineering design process?
Test and Evaluate
Define the Problem
Generate Concepts
Construct a Prototype
In the engineering design process, after defining the problem, engineers typically:
Build a prototype immediately
Brainstorm multiple solutions
Market the product
Conduct failure analysis
Which of the following best describes iterative design?
A process done once with no changes
Repeating steps to refine a solution
Ignoring test results
Designing without a plan
The main goal of a prototype is to:
Make money
Test the feasibility of a concept
Replace the final product
Avoid collaboration
Collaborative modeling is important because:
Only engineers can solve problems
Teams bring diverse ideas and perspectives
It reduces the need for testing
It slows down the design process
CAD (Computer-Aided Design) is primarily used to:
Test materials physically
Create detailed digital models
Market products online
Determine team roles
A key benefit of using modern product design tools is:
They eliminate the need for prototypes
They allow quick iteration and analysis
They replace brainstorming
They remove the need for collaboration
Which of the following is NOT a collaborative modeling technique?
Brainstorming sessions
Peer review of designs
Individual sketching in isolation
Group CAD modeling
What is the primary consideration when selecting a material for a product?
Color only
Cost, strength, and durability
Popularity
Brand recognition
Which test measures how a material resists being pulled apart?
Compression test
Tensile test
Hardness test
Flexibility test
A material that bends without breaking has:
High brittleness
High ductility
Low toughness
Low density
Which property is most important for a shoe sole?
Electrical conductivity
Flexibility and durability
Transparency
Magnetic susceptibility
The primary goal of designing a shoe is to:
Minimize cost only
Balance function, comfort, and aesthetics
Maximize production speed
Copy existing designs
Ergonomic design focuses on:
Visual appeal only
Fit and comfort for the user
Production efficiency
Material cost reduction
Before finalizing a shoe design, engineers should:
Skip prototyping
Test the design for comfort and durability
Market it immediately
Change materials randomly
Which of the following is a simple machine?
Pulley
Car
Bicycle
Smartphone
A lever with the fulcrum in the middle is a:
First-class lever
Second-class lever
Third-class lever
Compound lever
Which type of simple machine is an inclined plane wrapped around a cylinder?
Wedge
Screw
Pulley
Lever
A wheel and axle reduces:
Friction only
Input force needed to move an object
Gravity
Mechanical advantage
A compound machine is:
A machine with one simple machine
A machine made of multiple simple machines working together
Less efficient than simple machines
Only used in cars
Mechanisms are used to:
Generate motion
Create electrical circuits
Reduce material costs
Replace humans entirely
A gear train is used to:
Convert motion type
Reduce friction
Lift heavy objects manually
Make materials stronger
Which mechanism converts rotary motion to linear motion?
Crank-slider
Pulley
Lever
Inclined plane
A cam and follower mechanism is primarily used to:
Control motion
Increase material strength
Measure force
Generate electricity
The main purpose of the A-door-able Hens activity was to:
Design a decorative door
Apply mechanisms to a real-world problem
Test material properties
Learn marketing strategies
Which type of motion was most commonly explored in the door project?
Linear and rotary motion
Vibrational motion only
Fluid motion
Thermal expansion
In testing the door mechanism, students observed:
How friction affects motion
Only visual appeal
Electrical conductivity
Marketing trends
Which device converts rotary motion to reciprocating motion?
Pulley
Crank and slider
Wedge
Lever
Which type of motion conversion is commonly found in bicycles?
Linear to rotational
Rotational to linear
Linear to vibrational
Rotational to oscillating
The primary challenge in motion conversion is:
Reducing mechanical advantage
Minimizing friction and energy loss
Increasing material weight
Project 1.2.3 Motion Conversion Challenge: The main goal of the Motion Conversion Challenge was to:
Build a compound machine
Test a new CAD software
Market a shoe design
Measure tensile strength
Project 1.2.3 Motion Conversion Challenge: A successful motion conversion mechanism must consider:
Efficiency, accuracy, and reliability
Color and texture only
Marketing potential
Cost of paint
Project 1.2.3 Motion Conversion Challenge: In mechanical design, energy is primarily transferred via:
Electrical current
Motion
Chemical reactions
Sound waves
Career Exploration: A key skill for engineers is:
Ignoring teamwork
Critical thinking and problem-solving
Memorizing formulas only
Avoiding documentation
Career Exploration: Which career could directly use knowledge of mechanical design?
Civil engineer
Mechanical engineer
Graphic designer
Marketing manager
Career Exploration: Ethical considerations in engineering include:
Cost reduction only
Safety, sustainability, and societal impact
Skipping testing
Copying competitors
Career Exploration: Professional engineers often collaborate with:
Only engineers in the same field
Multidisciplinary teams
Only management
Only clients
Career Exploration: CAD and CAM technologies are commonly used in:
Agriculture
Product design and manufacturing
Marketing
Finance
Career Exploration: Which of the following demonstrates creativity in engineering?
Following instructions exactly
Developing innovative solutions to problems
Copying previous designs
Ignoring client needs
Career Exploration: Engineers are required to document their design process to:
Share results and support testing
Skip prototyping
Increase costs
Reduce collaboration
Explain why testing a prototype is important in the engineering design process.
Describe one example of a simple machine you encounter in everyday life and explain how it helps reduce effort.
What is the difference between ductility and brittleness in materials?
Part II: Short Answer (2 points each). Describe a situation where you would need to convert rotary motion to linear motion.
Explain the importance of collaboration in modern product design.
Identify two factors to consider when choosing materials for a product.
In the "A-door-able Hens" activity, what type of motion was most important for the door?
Describe a scenario where a cam and follower mechanism would be useful.
Why is it important for engineers to consider ethics in their work?
Give one example of a compound machine and explain how it combines simple machines to perform a task.
