Engineering students must use the engineering design process for a class project. The problem for this class project has been identified.
a. List four other steps of the engineering design process that the students should do.
b. Describe one purpose for each step you identified in part (a).
Question 4
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Question 5
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V=IR, R=V/I
Question 6
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Alternating current changes direction
Question 7
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Heat is the key word
Question 8
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A controller "controls" the device
Question 9
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Question 12
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Question 18
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Question 19
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Question 20
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Question 21
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An architect is designing a special fountain for an art museum. A system of copper pipes will be used to supply
water to different parts of the fountain.
Which of the following will occur if the architect uses a 45° elbow instead of a 90° elbow in one section of the piping system?
The water will flow with less resistance, allowing it to spray farther.
The water will be blocked by air bubbles in the pipe, causing it to build up.
The water will have more turbulent flow, decreasing the flow rate in the elbow.
The water will stop flowing through the pipe, causing it to overflow.
An automobile battery produces which type of current?
C. direct current
D. interval current
A. alternating current
B. digital current
The diagram below shows a system of hydraulic pistons. The surface area of piston Y is nine times greater than the surface area of piston X.
If a downward force of 10 N is applied to piston X, what upward force will piston Y exert?
10 N
90 N
3 N
30 N
A series circuit is shown in the diagram below.
A rectangular diagram of a circuit with a component in the center of each side. The component of the left side represented by two sets of alternating longer and shorter parallel lines with white space between them. This component is labeled '10 V'. The components on the top, right side, and bottom are all the same and each is represented by a zigzag line with no label.
What is the total resistance of the circuit if the current is 2 A?
6 ohms
15 ohms
60 ohms
5 ohms
Which of the following most likely operates on alternating current?
flashlight
tablet
cell phone
microwave oven
A teacher performs an experiment for a group of students. The teacher uses long, thin copper wires to connect a battery to a small light bulb. The students observe that the light bulb becomes dimmer. As the wires cool, the bulb becomes bright again.
Which of the following relationships is the teacher trying to demonstrate?
Wire diameter affects transformation.
Wire material affects voltage.
Light affects heat.
Temperature affects resistance.
Which of the following objects is a controller in a circuit?
switch
motor
battery
ammeter
Which of the following devices is most likely to use a laser?
computer speaker
DVD player
microwave oven
space heater
Which of the following statements best explains why fiber optic cable is preferred over copper wire in telephone and Internet applications?
Fiber optic cable can be used both indoors and outdoors.
Fiber optic cable is easier to manufacture and install into office buildings.
Fiber optic cable is less sensitive to temperature and electromagnetic interference.
Fiber optic cable is more flexible and needs no power source.
Wireless signals can be used in long distance data communication systems. Which two components of these communication systems interact with the wireless signals that travel a long distance?
destination and storage
receiver and decoder
transmitter and receiver
source and encoder
How are radio signals transmitted through the atmosphere?
as alternating current
as mechanical waves
as direct current
as electromagnetic waves
During which stage of manufacturing a wooden rocking chair are the pieces of the chair fastened together?
conditioning
forming
finishing
assembling
Which of the following is the best example of a finishing process in manufacturing?
drilling a hole
filling a mold
painting exterior surfaces
assembling multiple components
A factory that manufactures hats uses robots for some production tasks. Which of the following tasks are the robots most likely doing?
C producing sketches of new hat designs
B inspecting finished seams on the hats
A feeding cloth into the machines
D performing maintenance checks on the machines
A forced hot air system minimizes cold spots within the interior rooms of a house. Which of the following is primarily responsible for the efficient heating by a forced hot air system?
D radiant reflection
A convection heating system
B geothermal heating system
C infrared absorption
One goal of using alternative energy methods is to decrease dependency on fossil fuels. Which of the following statements best explains why dependency on fossil fuels needs to be decreased?
D Fossil fuels depend on the weather.
C Fossil fuels cost a lot of money.
A Fossil fuels are flammable.
B Fossil fuels are nonrenewable.
The drawing below represents a finished basement floor plan.
The left side shows a family room that is connected to the furnace room. On the right side of the family room, a doorway leads to a hallway which connects to a bathroom and an area labeled W.
The area labeled W contains seven equally spaced horizontal lines that lead to an area labeled landing which further leads to another set of seven equally spaced horizontal lines.
What does W represent in the drawing?
A pipelines
C ceiling tiles
B a staircase
D a ventilation duct
A student has a drawing of the Federal Reserve Bank Building in Boston, Massachusetts. The building’s height in the drawing is 25 cm. The drawing has a scale of 1 cm = 7.5 m.
What is the actual height of the building?
A 32.5 m
D 375 m
C 312.5 m
B 187.5 m
A company is designing a new automobile brake system. After repeated testing of the brake system prototype, engineers presented a report to their company explaining that they discovered a major problem in the system.
Which of the following should the engineers do next?
A redesign the brake system
B build a full-scale version of the brake system
C identify the reasons for building the brake system
D evaluate the quality of the report about the brake system
Many new car and truck frames are made of aluminum alloys. Which of the following statements describes an advantage of using aluminum frames in vehicles instead of steel frames?
C Aluminum frames have a lower weight, resulting in lower fuel consumption in
vehicles.
D Aluminum frames have a lower conductivity, resulting in slower corrosion rates
in vehicles.
A Aluminum frames have a higher R-value, providing greater strength to vehicles.
B Aluminum frames have a higher density, providing greater acceleration to
vehicles.
A pickup truck fully loaded with cargo weighs 5000 lb. If the cargo weighs 1000 lb., what is the dead load of the truck?
D 6000 lb.
B 4000 lb.
A 1000 lb.
C 5000 lb.
The foundation of a building carries the weight of the structure above it. Which of the following is the primary type of force on the foundation?
A compression
B friction
D torsion
C shear
What do all pneumatic tools have in common?
A They are powered by water.
B They are powered by compressed gas.
C They are powered by recirculated fluid.
D They are powered by supercooled fluid.
Which of the following statements best describes open fluid systems?
B Fluids are not recirculated through open systems.
A Water is the only fluid used in open systems.
C Open systems are used only in hydraulic applications.
D Open systems require minimal energy for continuous operation.
Which of the following statements explains why hydraulic systems are generally more efficient than pneumatic systems?
D Hydraulic fluid takes the shape of its container, whereas pneumatic fluid does
not take the shape of its container.
A Hydraulic fluid is not corrosive, whereas pneumatic fluid is corrosive.
C Hydraulic fluid has a low density and pressure, whereas pneumatic fluid has a
high density and pressure.
B Hydraulic fluid is in-compressible, whereas pneumatic fluid is compressible.