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WorksheetsFall Semester Exam
Total questions: 25
Worksheet time: 13mins
The main purpose of the engineering design process is to:
Guarantee that a design will work on the first try
Provide a structured method for solving problems
Reduce the cost of all engineering projects
Eliminate the need for prototypes
During which step of the design process do engineers typically create rough drawings and brainstorm many possible solutions?
Define the problem
Generate concepts
Test and evaluate
Communicate results
A prototype is best described as:
A final commercial product
A model used to test and refine ideas
A written explanation of the design
The step where the project is graded
When an engineer tests a design and identifies weaknesses, the next step is usually to:
Start the entire project over
Ignore the issue if the design mostly works
Modify and improve the design
Assume the test was incorrect
Constraints in an engineering challenge are:
Ideas for making the design better
Limitations or restrictions on the design
The final test of the design
The materials used in the design
Ancient Roman aqueducts were primarily designed to:
Transport soldiers across rivers
Supply cities with clean water
Protect towns from invaders
Generate electrical energy
Which of the following is the main advantage of an arch bridge?
It is the cheapest design to build
It naturally carries loads into the ground through compression
It only uses tension forces
It cannot be built with stone or concrete
A dam helps support a community by:
Allowing ships to travel faster
Eliminating the need for freshwater systems
Controlling water flow and creating reservoirs
Reducing friction in transportation systems
Infrastructure refers to:
Entertainment buildings and sports complexes
Essential systems that support a society, like roads and power
Only structures built before 1900
Projects completed by mechanical engineers
The force that most bridge designs must primarily resist is:
Lift
Compression
Gravity
Radiation
A suspension bridge stays supported mainly because:
The cables carry tension while the towers handle compression
All weight is supported by the roadway alone
The bridge moves enough to avoid forces
It uses no load-bearing materials
Which civilization is known for constructing long-lasting roads that improved communication and trade?
Ancient Greece
Ancient Rome
Ancient China
Ancient Egypt
Mechanical advantage describes:
How much fuel an engine uses
How much a machine multiplies input force
How fast a structure can be built
How long a roller coaster track must be
A lever that has the fulcrum in the middle (like a seesaw) is classified as a:
First-class lever
Second-class lever
Third-class lever
Fourth-class lever
Newton’s First Law states that an object in motion will stay in motion unless acted on by:
Friction only
Gravity
An unbalanced force
Another moving object
A Rube Goldberg machine demonstrates engineering ideas by:
Making simple tasks intentionally complex
Eliminating the need for simple machines
Using only chemical reactions
Reducing energy transfer
Potential energy on a roller coaster is greatest at:
The moment just before braking
The lowest point of the track
The top of the first hill
During a loop when the car is upside down
A heat engine operates by:
Turning electricity into heat
Using temperature differences to produce mechanical work
Cooling air to increase power
Storing thermal energy for later use
In a four-stroke gasoline engine, the power stroke occurs when:
The piston moves up to compress fuel
The spark plug ignites the fuel–air mixture
Mechanical systems often lose energy due to:
Magnetism
Tension
Friction
Lift
Lift is generated on an airplane wing primarily because:
Air moves faster over the top than the bottom
Gravity decreases at high altitude
The engines push air downward
The wing is heavier than the air around it
Which force pulls an aircraft toward the Earth?
Lift
Drag
Thrust
Weight
Drag is best described as:
The upward force created by an airfoil
Air resistance that opposes motion
A decrease in gravity
Forward-pushing engine power
Thrust is produced by:
Landing gear
Engines or propellers
Ailerons and elevators
Pitch, roll, and yaw refer to:
Types of aircraft engines
Ways pilots schedule flight paths
Movements of an aircraft around its axes
Structural failures that occur in flight
