WorksheetsPLTW EES – Comprehensive Midterm Exam (50 Questions)
Total questions: 50
Worksheet time: 25mins
What is the primary purpose of a conceptual model?
To show every detail of a real object
To simplify and represent a system or idea
To replace real-world testing
To serve as a final product
Which of the following is an example of a graphical model?
Written procedure
Physical prototype
Map
Hypothesis
GIS stands for:
Global Information Software
Geographic Information System
General Industrial System
Graphic Integration System
Which design process step focuses on identifying criteria and constraints?
Generate Concepts
Develop Solution
Define the Problem
Present the Solution
Brainstorming multiple ideas occurs during which design process step?
Define the Problem
Generate Concepts
Build and Test
Evaluate
Optimization means:
Choosing the cheapest solution
Doing the most with the least
Ignoring constraints
Selecting the first idea
Which variable is changed on purpose during an experiment?
Dependent
Controlled
Independent
Constant
Why are controls important in experiments?
They eliminate variables
They provide a comparison
They increase bias
They speed up results
An ethical dilemma occurs when:
There is one obvious answer
Both options have negative impacts
No one is affected
Rules are ignored
Sustainability focuses on:
Short-term profit
Immediate solutions only
Future environmental, social, and economic impact
Eliminating cost
Why is a project schedule important?
It guarantees success
It eliminates teamwork
It tracks tasks and deadlines
It replaces planning
A Gantt chart is used to:
Brainstorm ideas
Track experimental data
Schedule project tasks
Build prototypes
A compound machine is best described as:
One simple machine
Two or more simple machines working together
A biological system
A digital model
Which is a simple machine commonly found in the human body?
Pulley
Gear train
Lever
Wheel and axle
The elbow joint in the human body functions as a:
Wheel and axle
Screw
Lever
Wedge
The study of mechanical aspects of biological systems is called:
Anatomy
Ergonomics
Biomechanics
Kinesiology
Engineers consider ergonomics to:
Improve aesthetics
Increase cost
Improve safety and comfort
Reduce documentation
What tool is used to measure joint angles?
Ruler
Caliper
Goniometer
Protractor
An isometric sketch shows:
One flat view
Two dimensions
Three dimensions
Only height and width
Why are isometric sketches useful?
They eliminate the need for dimensions
They simplify complex systems
They show size and shape proportionally
They replace CAD models
Which model type is MOST useful for early idea development?
Physical model
Conceptual model
Prototype
Final product
Which CAD modeling method combines shapes together?
Subtractive
Additive
Orthographic
Conceptual
Removing material using a hole shape in CAD is called:
Grouping
Alignment
Subtractive modeling
Prototyping
Why do engineers often use computer models before physical models?
They are less detailed
They cost more
They reduce time and cost
They replace testing
Which is an example of a compound machine?
Ramp
Lever
Scissors
Pulley
All models have __________ because they cannot represent every detail.
limitations
advantages
colors
instructions
A map that combines multiple layers of data is created using __________.
GIS (Geographic Information System)
GPS (Global Positioning System)
Remote Sensing
Cartography
Criteria describe what a solution must __________.
achieve
ignore
delay
complicate
Constraints describe the __________ of a solution.
limitations
advantages
costs
benefits
The variable that is measured in an experiment is the __________ variable.
dependent
independent
controlled
extraneous
A project document that defines scope and goals is called a __________.
brief
invoice
agenda
memo
Ethical decision-making requires considering __________ of each option.
consequences
opinions
locations
colors
Sustainability considers the needs of __________ generations.
future
past
current
ancient
Two or more simple machines working together form a __________ machine.
compound
simple
mechanical
electric
The elbow joint acts as a __________ in the human body.
hinge
ball and socket
pivot
gliding
The axis point of a lever is called the __________.
fulcrum
pivot
load
effort
A tool used to measure elbow range of motion is a __________.
goniometer
thermometer
stethoscope
sphygmomanometer
A hand-drawn 3D representation is called an __________ sketch.
isometric
orthographic
perspective
oblique
A physical model allows engineers to test __________ and performance.
function
color
weight
price
CAD stands for __________ Aided Design.
Computer
Creative
Chemical
Civil
Conceptual models are used to test final performance.
True
False
GIS can be used to analyze patterns and relationships.
True
False
The design process is linear and never repeated.
True
False
Optimization often involves trade-offs.
True
False
Ethical problems always have one correct answer.
True
False
The human body contains simple machines.
True
False
Ergonomic design improves worker safety and comfort.
True
False
Isometric sketches only show one side of an object.
True
False
Additive modeling combines solid shapes.
True
False
Physical models are usually faster and cheaper than computer models.
True
False
