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PLTW EES – Comprehensive Midterm Exam (50 Questions)

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

What is the primary purpose of a conceptual model?

a)

To show every detail of a real object

b)

To simplify and represent a system or idea

c)

To replace real-world testing

d)

To serve as a final product

2.

Which of the following is an example of a graphical model?

a)

Written procedure

b)

Physical prototype

c)

Map

d)

Hypothesis

3.

GIS stands for:

a)

Global Information Software

b)

Geographic Information System

c)

General Industrial System

d)

Graphic Integration System

4.

Which design process step focuses on identifying criteria and constraints?

a)

Generate Concepts

b)

Develop Solution

c)

Define the Problem

d)

Present the Solution

5.

Brainstorming multiple ideas occurs during which design process step?

a)

Define the Problem

b)

Generate Concepts

c)

Build and Test

d)

Evaluate

6.

Optimization means:

a)

Choosing the cheapest solution

b)

Doing the most with the least

c)

Ignoring constraints

d)

Selecting the first idea

7.

Which variable is changed on purpose during an experiment?

a)

Dependent

b)

Controlled

c)

Independent

d)

Constant

8.

Why are controls important in experiments?

a)

They eliminate variables

b)

They provide a comparison

c)

They increase bias

d)

They speed up results

9.

An ethical dilemma occurs when:

a)

There is one obvious answer

b)

Both options have negative impacts

c)

No one is affected

d)

Rules are ignored

10.

Sustainability focuses on:

a)

Short-term profit

b)

Immediate solutions only

c)

Future environmental, social, and economic impact

d)

Eliminating cost

11.

Why is a project schedule important?

a)

It guarantees success

b)

It eliminates teamwork

c)

It tracks tasks and deadlines

d)

It replaces planning

12.

A Gantt chart is used to:

a)

Brainstorm ideas

b)

Track experimental data

c)

Schedule project tasks

d)

Build prototypes

13.

A compound machine is best described as:

a)

One simple machine

b)

Two or more simple machines working together

c)

A biological system

d)

A digital model

14.

Which is a simple machine commonly found in the human body?

a)

Pulley

b)

Gear train

c)

Lever

d)

Wheel and axle

15.

The elbow joint in the human body functions as a:

a)

Wheel and axle

b)

Screw

c)

Lever

d)

Wedge

16.

The study of mechanical aspects of biological systems is called:

a)

Anatomy

b)

Ergonomics

c)

Biomechanics

d)

Kinesiology

17.

Engineers consider ergonomics to:

a)

Improve aesthetics

b)

Increase cost

c)

Improve safety and comfort

d)

Reduce documentation

18.

What tool is used to measure joint angles?

a)

Ruler

b)

Caliper

c)

Goniometer

d)

Protractor

19.

An isometric sketch shows:

a)

One flat view

b)

Two dimensions

c)

Three dimensions

d)

Only height and width

20.

Why are isometric sketches useful?

a)

They eliminate the need for dimensions

b)

They simplify complex systems

c)

They show size and shape proportionally

d)

They replace CAD models

21.

Which model type is MOST useful for early idea development?

a)

Physical model

b)

Conceptual model

c)

Prototype

d)

Final product

22.

Which CAD modeling method combines shapes together?

a)

Subtractive

b)

Additive

c)

Orthographic

d)

Conceptual

23.

Removing material using a hole shape in CAD is called:

a)

Grouping

b)

Alignment

c)

Subtractive modeling

d)

Prototyping

24.

Why do engineers often use computer models before physical models?

a)

They are less detailed

b)

They cost more

c)

They reduce time and cost

d)

They replace testing

25.

Which is an example of a compound machine?

a)

Ramp

b)

Lever

c)

Scissors

d)

Pulley

26.

All models have __________ because they cannot represent every detail.

a)

limitations

b)

advantages

c)

colors

d)

instructions

27.

A map that combines multiple layers of data is created using __________.

a)

GIS (Geographic Information System)

b)

GPS (Global Positioning System)

c)

Remote Sensing

d)

Cartography

28.

Criteria describe what a solution must __________.

a)

achieve

b)

ignore

c)

delay

d)

complicate

29.

Constraints describe the __________ of a solution.

a)

limitations

b)

advantages

c)

costs

d)

benefits

30.

The variable that is measured in an experiment is the __________ variable.

a)

dependent

b)

independent

c)

controlled

d)

extraneous

31.

A project document that defines scope and goals is called a __________.

a)

brief

b)

invoice

c)

agenda

d)

memo

32.

Ethical decision-making requires considering __________ of each option.

a)

consequences

b)

opinions

c)

locations

d)

colors

33.

Sustainability considers the needs of __________ generations.

a)

future

b)

past

c)

current

d)

ancient

34.

Two or more simple machines working together form a __________ machine.

a)

compound

b)

simple

c)

mechanical

d)

electric

35.

The elbow joint acts as a __________ in the human body.

a)

hinge

b)

ball and socket

c)

pivot

d)

gliding

36.

The axis point of a lever is called the __________.

a)

fulcrum

b)

pivot

c)

load

d)

effort

37.

A tool used to measure elbow range of motion is a __________.

a)

goniometer

b)

thermometer

c)

stethoscope

d)

sphygmomanometer

38.

A hand-drawn 3D representation is called an __________ sketch.

a)

isometric

b)

orthographic

c)

perspective

d)

oblique

39.

A physical model allows engineers to test __________ and performance.

a)

function

b)

color

c)

weight

d)

price

40.

CAD stands for __________ Aided Design.

a)

Computer

b)

Creative

c)

Chemical

d)

Civil

41.

Conceptual models are used to test final performance.

a)

True

b)

False

42.

GIS can be used to analyze patterns and relationships.

a)

True

b)

False

43.

The design process is linear and never repeated.

a)

True

b)

False

44.

Optimization often involves trade-offs.

a)

True

b)

False

45.

Ethical problems always have one correct answer.

a)

True

b)

False

46.

The human body contains simple machines.

a)

True

b)

False

47.

Ergonomic design improves worker safety and comfort.

a)

True

b)

False

48.

Isometric sketches only show one side of an object.

a)

True

b)

False

49.

Additive modeling combines solid shapes.

a)

True

b)

False

50.

Physical models are usually faster and cheaper than computer models.

a)

True

b)

False