Deck 6: Technology: Technology-Engineering

Question 1

Which of the following tools can be used in a separating process during manufacturing?

A)kiln
B)mold
C)rivet
D)shears

Answer 1

shears

Question 2

Which of the following is the most likely reason for choosing a building material with a low thermal conductivity for a home?

A)reduced heating costs
B)increased heat transfer
C)reduced construction costs
D)increased structural strength

Answer 2

reduced heating costs

Question 3

Which of the following is the best example of a transmitter functioning in a communication system?

A)A fax machine prints out an image.
B)A satellite dish on the ground receives a video signal.
C)A computer processor translates a digital signal to an analog signal.
D)A cellular telephone tower sends information to a cellular telephone.

Answer 3

A cellular telephone tower sends information to a cellular telephone.

Question 4

A builder installs a radiant barrier on the floor of an attic to reduce summer heat gain in the house. To achieve the best result, the builder should use a material for the radiant barrier that is

A)highly porous.
B)highly reflective.
C)highly absorptive.
D)highly conductive.

Question 5

Which of the following objects is a controller in a circuit?

A)ammeter
B)battery
C)motor
D)switch

Question 6

Audio signals in MP3 players are stored in digital form. In order for these signals to be heard through headphones or speakers, the digitally stored data is converted by which of the following components?

A)a digital to data converter
B)a digital to video converter
C)a digital to analog converter
D)a digital to optical converter

Question 7

It is not advisable to seek shelter under a highway overpass during a tornado. When air moves through this narrow area, wind speeds increase and pressure decreases. This increases the risk for injuries. This phenomenon can be explained by which of the following?

A)Bernoulli's principle
B)gravitational force
C)R-values
D)shear

Question 8

Which of the following statements describes the major difference between a closed fluid system and an open fluid system?

A)A closed fluid system uses a gas and an open fluid system uses a liquid.
B)A closed fluid system uses a liquid and an open fluid system uses a gas.
C)A closed fluid system does not retain all its fluids and an open fluid system does.
D)A closed fluid system retains all its fluids and an open fluid system does not.

Question 9

Maria needs to measure the amount of current flowing through a closed circuit. Which of the following instruments should she use for this task?

A)ammeter
B)hygrometer
C)ohmmeter
D)voltmeter

Question 10

An engineer has just finished building a prototype of a lawn tractor that is powered by a hydrogen fuel cell. Which of the following should be the next step in the design process?

A)testing the prototype to evaluate its performance
B)asking for funding to build more copies of the prototype
C)building a second prototype that is different from the first
D)making modifications to the prototype that will increase its performance

Question 11

Which of the following acts primarily as a storage device in a communication system?

A)antenna
B)microphone
C)computer display
D)computer hard drive

Question 12

Which of the following environmental conditions do architects most likelyconsider when they decide on the placement of windows in new houses in the northeastern United States?

A)maximum wind speeds
B)average summer temperatures
C)solar angle throughout the year
D)amount of precipitation each year

Question 13

Building codes for single-family homes regulate the heights of chimneys.Which of the following is the most likely reason for this regulation?

A)to make sure the best materials are used to build chimneys
B)to make sure chimneys can hold the maximum amount of heat
C)to make sure chimneys are strong enough to help support the house
D)to make sure dangerous gases are properly ventilated through chimneys

Question 14

A worker is using an arc welder to join two pieces of metal. Which of the following safety precautions is mostimportant for the worker to prevent infrared radiation exposure when welding?

A)Wear a helmet with a dark face plate.
B)Make sure to discharge any static electricity.
C)Have the operational manual nearby for reference.
D)Make sure the electrode material is similar to the joining metals.

Question 15

A factory that manufactures hats uses robots for some production tasks. Which of the following tasks are the robots most likely doing?

A)feeding cloth into the machines
B)inspecting finished seams on the hats
C)producing sketches of new hat designs
D)performing maintenance checks on the machines

Question 16

In a circuit, an electrician replaces a 4 ft. section of wire with a wire that has a larger diameter. This change in wire diameter will cause which of the following results?

A)The current in the new wire section will be less than in the original wire.
B)The resistance of the new wire section will be less than that of the original wire.
C)A greater power loss in the circuit will occur because of the new wire section.
D)A greater voltage drop across the circuit will occur because of the new wire section.

Question 17

A deep space probe uses which of the following to communicate with scientists on Earth?

A)alternating current
B)radio waves
C)sound waves
D)visible light

Question 18

Which of the following is the best example of conductive heat transfer?

A)sunlight warming sand on a beach
B)a fan blowing hot air around a room
C)warm water vapor rising from a hot tub
D)a hot water bottle resting on a person's back

Question 19

Which of the following advances in automotive technology were developed to improve driver and passenger safety?

A)aerodynamic spoilers
B)computerized fuel injection systems
C)hybrid engines
D)shatterproof windshields

Question 20

Which of the following statements best describes how mineral deposits on the interior surface of a water pipe affect the flow of water through the pipe?

A)The deposits effectively decrease the diameter of the pipe, causing water to slowly solidify.
B)The deposits effectively increase the diameter of the pipe, causing water to slowly evaporate.
C)The deposits effectively decrease the diameter of the pipe, reducing the amount of water that can flow through the pipe per minute.
D)The deposits effectively increase the diameter of the pipe, increasing the amount of water that can flow through the pipe per minute.

Question 21

An engineer is designing an injection mold that can be used to make 10,000 plastic parts per day. Which of the following materials would be best to use to build this mold?

A)cement
B)glass
C)plastic
D)steel

Question 22

An architect is designing a house to be built in Maine. Which of the following features would maximize both passive solar heating and the amount of natural light inside the house?

A)a high gable roof
B)light-colored vinyl siding
C)solar-electric panels on the roof
D)a large number of south-facing windows

Question 23

In a factory that manufactures automobiles, some workers have the job of installing doors on the cars. Which part of the manufacturing process is this job?

A)forming
B)finishing
C)conditioning
D)assembling

Question 24

Sarah presented an idea for recycling used tires to an automotive company. If she followed the engineering design process, what was the first step in developing her idea?

A)communicating the results of her research
B)developing a prototype she wanted to make
C)selecting the best possible solution to her problem
D)identifying the specific problem she wanted to solve

Question 25

A farmer places a sprinkler on top of a platform in the middle of a field. Water is pumped to the sprinkler from a water supply tank. The spray from the sprinkler, however, does not reach the edges of the field.Which of the following should the farmer do to increase the range of the sprinkler?

A)Place the sprinkler at ground level.
B)Reduce the diameter of the sprinkler nozzle
C)Move the water supply tank closer to the field.
D)Increase the diameter of the water supply tank.

Question 26

A manufacturing company wants to increase its production. Which of the following is the best reason why the company should consider using robotic systems?

A)Robotic systems are easy to operate.
B)Robotic systems can function continuously.
C)Robotic systems are inexpensive to purchase.
D)Robotic systems are more intelligent than human workers.

Question 27

How many views are usually necessary in order to describe an object using an orthographic projection?

A)1 or 2
B)2 or 3
C)4 or 5
D)5 or 6

Question 28

DC voltage sources have a positive (+) terminal and a negative (-) terminal. Which of the following statements explains why AC voltage sources do not have positive and negative terminals?

A)AC voltage at each terminal is always changing.
B)AC current does not involve charged particles.
C)AC current is safe and warning labels are not needed.
D)AC voltage at each terminal is always higher than ground.

Question 29

Which of the following is considered a nonrenewable energy source?

A)sunlight
B)uranium
C)wind
D)wood

Question 30

Information produced by technological devices can travel through optical fiber, air, and space. Which of the following statements describes what these media have in common?

A)Information travels through these media at the same speed.
B)Information travels through these media at a single frequency.
C)Information travels through these media using mechanical waves.
D)Information travels through these media using electromagnetic waves.

Question 31

One type of hydraulic system is designed to lift heavy objects. Which of the following statements best explains this application?

A)The hydraulic system acts as a force multiplier.
B)The hydraulic system acts as a work multiplier.
C)The hydraulic system acts as a power multiplier.
D)The hydraulic system acts as an energy multiplier.

Question 32

The electrical resistance of a wire may change depending on which of the following?

A)the luster of the wire
B)the elasticity of the wire
C)the malleability of the wire
D)the temperature of the wire

Question 33

Before releasing a newly designed video game to the public, the developer distributes the game to a few hundred people free of charge. After playing the game, the people complete a survey and return it to the developer. What part of the engineering design process does this scenario represent?

A)redesign
B)testing and evaluation
C)selection of a solution
D)construction of prototypes

Question 34

When calculators were first introduced, they were large and not very portable. Which of the following allowed for the development of pocket-size calculators?

A)direct current
B)fewer function keys
C)graphing software
D)smaller microprocessors

Question 35

For a manufacturing process, the cutting edges of the separating tool should typically have which of the following characteristics?

A)They should be harder than the material being cut.
B)They should be cleaner than the material being cut.
C)They should be more porous than the material being cut.
D)They should be more flexible than the material being cut.

Question 36

During World War II, signal lights were used to send Morse code messages between ships. A sailor would open and close a shutter over a light source to send "dots" and "dashes" of lightto another ship. The sailor performed the function of which component of a communication system?

A)decoder
B)destination
C)encoder
D)receiver

Question 37

Telephone circuits were originally made of copper. Which of the following has replaced much of the copper circuitry that connected telephone switching stations over long distances?

A)fiberoptic cables
B)reinforced plastics
C)superconductors
D)tungsten wires

Question 38

Which of the following causes the greatest resistance to water flowing through a PVC piping system?

A)elbows
B)gaskets
C)insulation
D)rust

Question 39

Which of the following functions can a variable resistor perform?

A)storing electrical charge
B)adjusting light intensity
C)creating electrical energy
D)controlling current direction

Question 40

Which of the following is an example of an open fluid system?

A)an irrigation system for a farm
B)a forced hot water heater for a house
C)a hydraulic braking system for a truck
D)a cooling system for an automobile engine

Question 41

During a hurricane, winds can blow out windows and walls, or remove the roof from a house. According to Bernoulli's principle, which of the following statements best explains why this can occur?

A)Wind blowing around and over a house creates convection currents outside the house.
B)Wind blowing around and over a house is at a lower pressure than the air inside the house.
C)Wind blowing around and over a house is at a higher temperature than the air inside the house.
D)Wind blowing around and over a house creates electrostatic charges in the air around the house.

Question 42

Which of the following describes the primary function of an alkaline battery in the circuit of a typical flashlight?

A)It opens and closes the circuit path.
B)It provides resistance to generate light.
C)It converts chemical energy to electrical energy for the circuit.
D)It serves as a conductor through which electrical energy flows.

Question 43

The floor of a particular motel room should be able to support 50 lb. per sq. ft. of live load. If the dimensions of the room are 12 ft. * 15 ft., what is the total live load that the floor should support?

A)600 lb.
B)750 lb.
C)1350 lb.
D)9000 lb.

Question 44

Which of the following are represented using binary values?

A)analog signals
B)digital signals
C)gamma rays
D)ultraviolet rays

Question 45

Since the introduction of the cellular phone, many advances in wireless communication have been made. Which of the following features has been added to cellular phones for the purpose of finding someone who has placed an emergency call?

A)caller identification
B)digital camera
C)global positioning system
D)text messaging

Question 46

Which of the following matches a communication medium with a type of signal that can be readily transmitted through it?

A)copper wire-electric
B)copper wire-infrared
C)optical fiber-radio
D)optical fiber-x-ray

Question 47

Message signs and arrow boards are used to direct traffic and safeguard workers on roads and highways. These devices were originally run by dieselpowered generators.Which of the following provides a practical way to power these mobile devices and is more efficient than a generator?

A)natural gas
B)water power
C)a geothermal system
D)a solar conversion system

Question 48

A contractor needs to choose a low-density material for use in the construction of a building. When comparing two materials of the same size, the less dense material always gives a building structure which of the following characteristics?

A)lower weight
B)greater strength
C)lower flammability
D)greater electrical conductivity

Question 49

A manufacturer has developed a textured surface for plastic cups. These cups are designed for small children. The manufacturer has produced prototypes.Which of the following is the next step in the engineering design process?

A)marketing the new textured cups
B)developing new textures for cup surfaces
C)testing and evaluating the textured prototypes
D)redesigning the textured surface on the prototypes

Question 50

Television remote controls use infrared signals to allow a viewer to change channels from a distance. Which of the following best describes the operation of the remote control?

A)decoding and storing
B)storing and retrieving
C)receiving and decoding
D)encoding and transmitting

Question 51

What occurs in a fiber-optic cable to allow light to transmit information?

A)boundary scattering
B)energy dissipation
C)surface interference
D)total internal reflection

Question 52

Which of the following is not a use of fiber-optic technology?

A)to see inside the human body
B)to send digital data via land lines
C)to transmit signals to satellites in space
D)to inspect the internal mechanical parts of an airplane

Question 53

Advances in military technologies have often led to the development of everyday applications. Early radar systems operators noticed that objects near the radar were often heated when the radar was in use.This observation led to the development of which of the following everyday applications?

A)microwave ovens
B)motion detectors
C)nuclear reactors
D)solar collector panels

Question 54

Which of the following describes how power is transferred in hydraulic and pneumatic systems?

A)Hydraulic systems use air and pneumatic systems use steam.
B)Hydraulic systems use liquid and pneumatic systems use air.
C)Hydraulic systems use steam and pneumatic systems use air
D)Hydraulic systems use air and pneumatic systems use liquid.

Question 55

Which of the following devices uses a renewable resource to produce heat?

A)a fuel oil heater
B)a propane gas burner
C)a wood-burning stove
D)a coal-burning furnace

Question 56

An engineer suggests using a robotic system to manufacture a particular chemical. Although the chemical will be highly profitable, it will only be made in small amounts.Which of the following is most likely the engineer's reason for making the suggestion?

A)The robotic system can reduce the cost of materials.
B)The robotic system can increase the cost of production.
C)The robotic system can increase the selling price of the chemical.
D)The robotic system can reduce workers' exposure to potentially harmful chemicals.

Question 57

Which of the following processes relieves internal stress caused by hardening in a metal tool?

A)compressing
B)extruding
C)shearing
D)tempering

Question 58

Silicon carbide (SiC), a ceramic, is used in drill bits. Which of the following is the most likely reason that silicon carbide is suitable for this purpose?

A)It is soft and porous.
B)It is ductile and magnetic.
C)It is hard and resists abrasion.
D)It is brittle and has a low density.

Question 59

Wires X and Y are made of the same material. Which of the following could explain why wire X has a higher resistance than wire Y?

A)Wire X is colder than wire Y.
B)Wire X is shorter than wire Y.
C)Wire X has a different color coating than wire Y.
D)Wire X has a smaller cross-sectional area than wire Y

Question 60

When checking e-mail, Maria accesses a powerful computer called a server. The number of messages she can have in an account on the server is primarily limited by which of the following?

A)decoder capacity
B)retrieval speed
C)storage capacity
D)transmission speed

Question 61

A homeowner wants to convert her basement into a recreation room. Which of the following is the best reason why the homeowner should go to the local city or town hall?

A)to purchase tools and materials for the project
B)to find the most reputable contractor for the project
C)to ask for help in estimating the cost of materials and labor for the project
D)to check for building codes and safety regulations that apply to the project

Question 62

Which of the following types of lifting systems is best to use when a heavy load needs to be lifted and held precisely in place for a long period of time?

A)thermal
B)pneumatic
C)hydraulic
D)centrifugal

Question 63

Which of the following is a common source of an optical signal transmitted along a fiber-optic cable?

A)CRT
B)LED
C)resistor
D)transistor

Question 64

Lasers are commonly used in which of the following applications?

A)disposable film cameras
B)eye surgery for nearsighted people
C)power transmission over long distances
D)TV signal transmission over coaxial cables

Question 65

Which of the following is an example of casting?

A)A steel rod is heated and then rapidly cooled in a tank of water.
B)A molten alloy is poured into a mold where it cools and hardens.
C)A plastic pellet is forced through a die into a long, uniform shape.
D)A metal sheet is passed through smooth rollers to yield a curved piece.

Question 66

Which of the following statements best describes the functioning of an encoder in a mobile phone?

A)an antenna captures a signal
B)an LCD shows the number being dialed
C)a microphone converts sound to an electrical signal
D)a digital signal processor holds frequently dialed numbers

Question 67

Which of the following is most likely to require direct current (DC) for proper operation?

A)a blender
B)a flashlight
C)an electric heater
D)a microwave oven

Question 68

Which of the following examples describes a nonrenewable energy system?

A)Solar panels use energy from the Sun to heat a home.
B)Geothermal energy is used to heat water for a building.
C)Wind force turns windmill blades connected to a generator to produce electricity.
D)Coal is used to convert water into steam that turns turbine blades to produce electricity.

Question 69

An automobile company plans to develop an electric car to sell in urban areas. Which of the following will help the company evaluate the potential market for these cars?

A)field tests
B)scale models
C)prototype designs
D)consumer surveys

Question 70

Which of the following would best increase the year-round energy efficiency of a building that is subjected to hot summers and cold winters?

A)black exterior paint
B)fiberglass insulation
C)large glass windows
D)white exterior paint

Question 71

Air in a hydraulic brake line causes the brakes to malfunction. Which property of air is most responsible for the malfunction?

A)Air is less visible than brake fluid.
B)Air changes volume under pressure.
C)Air causes corrosion in the brake line.
D)Air changes temperature under pressure.

Question 72

Which of the following is a function of a home TV antenna?

A)transmitter
B)storage
C)source
D)receiver

Question 73

In one type of home air conditioner thermostat, the case of the temperature sensor is made of metal. Which of the following is the best reason for using metal?

A)Metal convects heat easily.
B)Metal conducts heat quickly.
C)Metal consumes heat slowly.
D)Metal radiates heat efficiently.

Question 74

Which of the following is used to read a compact disc in a compact disc player?

A)polarization
B)microwaves
C)a magnet
D)a laser

Question 75

Designers need to use a wind tunnel to test the airflow over a new design for an airplane wing. Since the wind tunnel is not large enough to hold the actual airplane wing, the designers will need to use which of the following?

A)a mockup
B)a propeller
C)a scale model
D)an orthographic projection

Question 76

A circuit has a source with an electrical potential of 12 V. The circuit contains one resistor.If a second resistor is added to the circuit in series, what effect will this have on the current in the circuit?

A)The current will increase.
B)The current will decrease.
C)The current will not be affected.
D)The current will switch from DC to AC.

Question 77

In which of the following fluid systems does the fluid remain within the system?

A)compressed air in a gas station
B)steam engine on a railroad train
C)forced hot water heating in a home
D)forced hot air heating in a car repair shop

Question 78

Digital information is transmitted over fiberoptic cable as pulses of which of the following?

A)electricity
B)light
C)microwaves
D)sound

Question 79

A structural component for a bridge needs to be especially strong in tension. Which of the following materials would be mostsuitable for this component?

A)concrete
B)copper
C)steel
D)wood

Question 80

A company sent prototypes of a newly designed hair dryer for trial use to 100 homes along with a satisfaction survey. A month later the company received 82 completed surveys.This process is part of which of the following steps in the engineering design process?

A)developing possible solutions
B)communicating the solution
C)researching the problem
D)evaluating outcomes