Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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A transducer converts light, heat, or mechanical energy into ____.
A. | movement | B. | electrical energy | C. | work | D. | a magnetic
field |
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2.
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____ exists when two conductive materials are separated by an insulating
material.
A. | Capacitance | B. | Triangulation | C. | Current | D. | Inductance |
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3.
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A(n) ____ transducer measures movement and creates signals that affect current
flow.
A. | resistive | B. | capacitive | C. | inductive | D. | None of the
above. |
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4.
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Wavelengths of light are measured in ____.
A. | degrees | B. | nanometers | C. | volts | D. | Megahertz |
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5.
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The categories of opto-electronic devices include ____.
A. | photovoltaic | B. | photoemissive | C. | photoconductive | D. | All of the
above. |
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6.
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Sensors used for color measurement and leak detection respond to electromagnetic
radiation in the ____ region of the spectrum.
A. | infrared | B. | gamma | C. | visible
light | D. | ultraviolet |
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7.
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The short wavelength of ____ allow them to pass through the human body.
A. | X-rays | B. | microwaves | C. | radio
waves | D. | radar waves |
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8.
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Computer vision sensors use ____ to determine the distance to an object based on
the apparent size of the camera image.
A. | triangulation | B. | visual servoing | C. | stadimetry | D. | capacitance |
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9.
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Sound sensors rely on ____ to convert sound to electrical energy.
A. | temperature change | B. | the piezoelectric effect | C. | current
flow | D. | light frequencies |
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10.
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A(n) ____ sensor produces a change in electrical output due to a fluctuation in
temperature.
A. | opto-electronic | B. | magnetic field | C. | thermoelectric | D. | infrared |
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11.
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The rotary motion of shafts, gears, and pulleys is measured by ____
sensors.
A. | temperature | B. | proximity | C. | mechanical
movement | D. | speed |
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12.
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Mechanical movement can be sensed using a ____.
A. | strain gauge | B. | proximity sensor | C. | tactile
sensor | D. | laser interferometric |
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13.
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A(n) ____ proximity sensor produces a magnetic field, which changes in intensity
when an object enters the field.
A. | optical | B. | eddy current | C. | acoustical | D. | touch-sensitive |
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14.
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A ____ device emits electrons in the presence of light.
A. | photoconductive | B. | photovoltaic | C. | photoemissive | D. | thermistor |
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15.
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The different types of radiation differ only in frequency or ____.
A. | temperature | B. | wavelength | C. | color | D. | strength |
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True/False
Indicate whether the
statement is true or false.
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16.
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Sensors help robots respond to changes and determine a course of action.
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17.
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Capacitance can be increased by reducing the thickness of insulation.
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18.
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In ac circuits, resistance opposes changes in current and increases as frequency
increases.
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19.
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Visible light is only a narrow band of frequencies within the electromagnetic
spectrum.
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20.
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An angstrom is one-tenth of a nanometer.
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21.
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Photoconductive devices convert light energy into electrical energy.
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22.
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All objects emit infrared thermal radiation.
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23.
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Light travels through optical fibers regardless of how the material is bent or
shaped.
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24.
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The tightly-focused beam of a laser can travel long distances with relatively
little spreading.
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25.
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Sound sensors detect spatial relationships and provide depth information.
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26.
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The resistance of a thermistor decreases as temperature increases.
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27.
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Magnetic field sensors identify a change in a magnetic field without making
physical contact with objects in the environment.
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28.
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A strain gauge is a type of proximity sensor.
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29.
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LEDs are not sensitive to shock and vibration.
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Completion
Complete each
statement.
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30.
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When current is flowing in an electrical circuit, ______________________________
opposes changes in current.
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31.
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Wavelengths of light are measured in ______________________________, which is
one billionth of a meter.
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32.
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A solar cell is an example of a(n) ______________________________ device.
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33.
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To produce a ruby laser beam, ______________________________ travel along the
axis of the ruby rod and are reflected by mirrors on each end, which amplifies the light.
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34.
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The ______________________________ in an X-ray tube is constructed of a heavy
metal.
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35.
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A(n) ______________________________ sensor provides depth information using
stadimetry and triangulation.
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36.
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Measuring angles and the base line of a triangle to determine an object’s
position is called ______________________________.
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37.
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The ______________________________ output generated by a dc tachometer is
translated into speed readings.
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38.
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Acoustical proximity sensors react to ______________________________.
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39.
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A(n) ______________________________ sensor determines the precise distance from
the sensor to an object.
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Matching
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Match the following terms with the appropriate definition. A. | capacitance | B. | triangulation | C. | piezoelectric
effect | D. | nanometer | E. | angstrom | F. | inductance | G. | stadimetry |
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40.
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Property of electrical circuits caused by the magnetic field surrounding a coil
when current is flowing.
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41.
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One billionth of a meter.
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42.
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Measuring angles and the baseline of a triangle to determine the position of an
object.
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43.
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Ability of a material to hold an electrical charge.
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44.
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Characteristic of crystals to develop an electrical potential when subjected to
mechanical stress.
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45.
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Determining depth based on the apparent size of the camera image.
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46.
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One-tenth of a nanometer.
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