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87 Cards in this Set
- Front
- Back
1-1. What unit of measurement is common to
both the English system and to the metric system? 1. Distance 2. Force 3. Mass 4. Time |
time
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1-2. What is the basis for metric units of
length? 1. The angstrom 2. The micron 3. The meter 4. The kilometer |
meter
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1-3. Refer to table 1-2 in your text. To
convert meters to millimeters, you should move the decimal point to the 1. right, six places 2. left, nine places 3. right, three places 4. left, six places |
right, 3 places
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1-4. The mil is a measure of length equal
to one one-thousandth of a/an 1. centimeter 2. inch 3. foot 4. yard |
2. inch
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1-5. What term defines the quantity of
matter that a body contains? 1. Volume 2. Height 3. Mass 4. Density |
3. Mass
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1-6. A given object will weigh the most
under which of the following conditions? 1. When compressed to a greater density and a smaller volume 2. When expanded to a greater volume and a lesser density 3. When located at one of the earth’s poles 4. When located on the equator |
3. When located at one of the
earth’s poles |
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1-7. Dynes and newtons are used in the
metric system as units of 1. work 2. force 3. pressure 4. mass |
force
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1-8. The knot is a derived unit that
combines the unit of distance with the unit of 1. power 2. work 3. time 4. acceleration |
time
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1-9. Under which of the following
conditions may the term velocity be used in place of speed? 1. Only if the unit of measurement is distance per second for a given length of time 2. Only if the unit of measurement is distance per hour for a given length of time 3. Only if the motion of the body is in a circular path following a given arc 4. Only if the motion of the body is in a straight path in a given direction |
4. Only if the motion of the body is
in a straight path in a given direction |
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1-10. To raise the temperature of 8 pounds
of water 5°F requires a heat energy of 1. 40 calories 2. 4 Btu 3. 252 calories 4. 777.8 foot-pounds |
40 calories
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1-11. What is the mechanical equivalent of
10 BTU of heat energy? 1. 1,356 foot-pounds 2. 2,520 foot-pounds 3. 7,460 foot-pounds 4. 7,778 foot-pounds |
4. 7,778 foot-pounds
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1-12. All units of power involve which of
the following measurements? 1. Force, distance, and time 2. Mass, velocity, and time 3. Work and distance 4. Mass and distance |
1. Force, distance, and time
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1-13. The power unit watt is not
restricted to electricity. It may be converted to horsepower for mechanical purposes. Therefore, 746 watts is the equivalent of what horsepower? 1. 1.0 hp 2. 2.0 hp 3. 0.5 hp 4. 2.5 hp |
1. 1.0 hp
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1-14. All matter, regardless of its form,
has mass and which of the following characteristics? 1. It has a constant weight 2. It occupies space 3. It is measured in newtons 4. It weighs more at the equator than at the North Pole |
2. It occupies space
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1–15. Matter exists in three natural
states. Of the following lists, which one contains the states of matter? 1. Physical, chemical, and nuclear 2. Electron, proton, and neutron 3. Solid, liquid, and gas 4. Fluid, porous, and vapor |
3. Solid, liquid, and gas
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1-16. Which of the following materials
possesses the property of porosity? 1. Liquids 2. Solids 3. Empty space 4. All of the above |
4. All of the above
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1-17. The reluctance of an object to
change its speed, direction, or position of rest is known as 1. cohesion 2. density 3. inertia 4. weight |
3. inertia
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1-18. What term describes the quantitative
measure of inertia? 1. Acceleration 2. Density 3. Weight 4. Mass |
4. Mass
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1-19. Acceleration does NOT occur in which
of the following circumstances? 1. A car traveling at 50 MPH turns a curve 2. A car traveling at 50 MPH in one direction for 2 minutes 3. A car starts from a stop and reaches 60 MPH in 18 seconds 4. A car slows from 60 MPH to 45 MPH in 12 seconds |
2. A car traveling at 50 MPH in one
direction for 2 minutes |
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1-20. What name is given to the space
through which action-at-a-distance forces are effective? 1. Weight 2. Gravity 3. Force field 4. Force space |
3. Force field
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1-21. A vector has which of the following
quantities? 1. Magnitude and direction only 2. Mass, magnitude, and direction only 3. Magnitude, space, and direction only 4. Mass, magnitude, space, and direction |
1. Magnitude and direction only
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1-22. The attractive force exerted on a
body by the earth is known as 1. velocity 2. inertia 3. gravity 4. acceleration |
3. gravity
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1-23. The weight of a body is determined
by calculating the 1. sum of the body mass and acceleration 2. gravitational pull on the body minus the associated frictional forces 3. gravitational pull between 1 cubic inch of the body and the earth’s surface 4. force on the body exerted by gravity |
4. force on the body exerted by
gravity |
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1-24. What mathematical calculation should
you use to determine the specific gravity of a substance? 1. Divide the volume of the substance by its weight 2. Divide the weight of the substance by the weight of an equal volume of water 3. Divide the volume of the substance by the volume of an equal weight of water 4. Take the reciprocal of the substance’s density |
2. Divide the weight of the
substance by the weight of an equal volume of water |
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1-25. Over a given surface under pressure,
what is the relationship between force per unit area and pressure? 1. Force is constant regardless of pressure changes 2. Force is directly proportional to pressure 3. Force is equal to pressure divided by unit area 4. Force is equal to unit area divided by pressure |
1. Force is constant regardless of
pressure changes |
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1-26. A mass in motion is stopped. What
happens to its kinetic energy? 1. It is converted to other forms of energy 2. It is returned to the source that produced it 3. It is increased by the amount necessary to stop the mass 4. It is destroyed |
1. It is converted to other forms of
energy |
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1-27. Which of the following statements
describes an ion? 1. An atom that does not have protons in its nucleus 2. An atom that does not attract other atoms 3. An atom with an overall neutral electrical charge 4. An atom with an unequal number of electrons and protons |
3. An atom with an overall neutral
electrical charge |
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1-28. The mass, and consequently the
weight, of an atom is contained almost entirely in the 1. nucleus 2. orbiting electrons 3. neutrons 4. electrons in the nucleus |
1. nucleus
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l-29. What is indicated by the atomic
number assigned to an element? 1. The number of protons in its nucleus 2. The number of atoms that give the element its distinguishing characteristics 3. The total mass of one of its atoms 4, The chronological order in which the element was discovered |
1. The number of protons in its
nucleus |
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1-30. By what means can you determine the
total number of protons and neutrons in an atom? 1. By the number of electrons it contains 2. By squaring its atomic number 3. By halving its atomic weight 4. By its atomic weight |
4. By its atomic weight
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1-31. Which of the following
characteristics indicates that an element is inert? 1. The outer electron shell of each atom is completely filled 2. The outer electron shell of each atom is balanced with the nucleus 3. It attracts free electrons 4. It repels free electrons |
1. The outer electron shell of each
atom is completely filled |
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1-32. Valence bonds hold ions together and
form them into molecules. This action results from interaction between 1. protons 2. nuclei 3. inner-shell electrons 4. outer-shell electrons |
4. outer-shell electrons
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1-33. What is the result of elements
physically combining without undergoing a chemical change? 1. A compound 2. A mixture 3. A valence bind 4. A loss of their chemical identities |
2. A mixture
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1-34. Molecules are constantly in motion
in which of the following substances? 1. Gases only 2. Solids and liquids only 3. Liquids only 4. Gases, solids, and liquids |
4. Gases, solids, and liquids
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1-35. Which of the following metals has the
highest property of elasticity? 1. Lead 2. Bronze 3. Tin 4. Aluminum |
2. Bronze
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1-36. Which of the following substances
possesses the property of elasticity of compression? 1. Liquids 2. Solids 3. Gases 4. All of the above |
4. All of the above
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1-37. Which of the following statements is
correct concerning the mechanical nature of liquids? 1. Hydraulic machinery permits liquids to be used to maintain input forces, which limits the advantages gained in mechanics 2, Uniform action is obtained without vibration, making the operation of the system largely affected only by vibrations in loads 3. Liquids can transmit energy around bends by using gears and levers, making remote location of system components possible 4. Energy can be transmitted through liquids instantaneously and equally in all directions |
1. Hydraulic machinery permits
liquids to be used to maintain input forces, which limits the advantages gained in mechanics |
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1-38. The accepted theory of gases assumes
that gas molecules possess which of the following properties? 1. High cohesion 2. High elasticity 3. In an unpressurized enclosed container, they exert pressure on the bottom and sides only 4. They exert equal pressure at all points on enclosing surfaces |
4. They exert equal pressure at all
points on enclosing surfaces |
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1-39. According to the kinetic theory,
which of the following statements is correct concerning gases when absolute zero temperature is reached? 1. It is the temperature at which no heat remains in the gas, but not the lowest temperature obtainable 2. It has been obtained only once, at which time the absolute zero point of -273.16°C was determined 3. It is the temperature at which all molecular activity stops 4. It is the temperature to which liquids, solids, and gases can be reduced and at which most molecular activity ceases |
3. It is the temperature at which
all molecular activity stops |
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1-40. In an experiment, it was observed
that the pressure of the gas in a sealed container could be increased. What other assumption could be made? 1. The temperature of the gas could be increased 2. The temperature of the gas could be decreased 3. The kinetic energy of the gas could be decreased 4. The molecules of the gas gained energy from each other |
4. The molecules of the gas gained
energy from each other |
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1-41. Under some conditions, it is
possible for the center of gravity to revolve around the center of 1. rotation 2. a tangent 3. revolution 4. levity |
1. rotation
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1 -42. In the study of masses in motion,
which of the following is a description of the term acceleration? 1. An act or process of changing place or position 2. A change in the body’s speed or direction of travel 3. A natural tendency of a body in motion to continue moving in a straight line 4. An opposition of a body to having its state of motion change |
2. A change in the body’s speed or
direction of travel |
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1-43. The equations F = ma and a = F÷m
given in the text are mathematical forms of Newton’s second law of motion. What do they indicate? 1. A force acting on a body is dependent upon the mass of that body 2. An acceleration of a body is dependent upon the force acting on that body 3. The mass of a body is dependent upon the force acting on it 4. The mass of a body is dependent upon the acceleration it is giv |
4. The mass of a body is dependent
upon the acceleration it is give |
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1-44. An automobile of a given mass
traveling 60 MPH has the same momentum as one having twice that mass and traveling at what velocity? 1. 10 MPH 2. 20 MPH 3. 30 MPH 4. 40 MPH |
3. 30 MPH
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1-45. Which of the following statements is
correct concerning work done by a person who lifts a 50-pound weight 6 feet and holds it there for 1 minute? 1. Work is done both in lifting the weight and holding it steady 2. Work is done in lifting the weight but not in holding it steady 3. No work is done because the person does not move 4. No work is done because there is no translational force present |
1. Work is done both in lifting the
weight and holding it steady |
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1-46. For a body to possess kinetic
energy, it must be in which of the following conditions? 1. Elevated from a position to which it can return 2. Compressed or stretched from its natural condition 3. At rest after working against a restoring force 4. In motion |
4. In motion
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1-47. An automobile weighs 3,200 pounds
and is traveling 30 mph. A truck weighs 6,400 pounds and is traveling 15 mph. How much kinetic energy does each vehicle have? Automobile Truck 1. 96,800 ft-lb 48,400 ft-lb 2. 48,400 ft-lb 96,800 ft-lb 3. 96,800 ft-lb 96,800 ft-lb 4. 48,400 ft-lb 48,400 ft-lb |
4. 48,400 ft-lb 48,400 ft-lb
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1-48. Which of the following is an
illustration of friction? 1. The contact of an airborne aircraft with the air 2. The use of brakes on a landing aircraft 3. The action of skates against ice 4. Each of the above |
4. Each of the above
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1-49. Increasing the mechanical advantage
of force in a system affects the applied force by 1. increasing it by the same ratio as the mechanical advantage 2. acting over a greater distance to do the same work 3. requiring less total energy to do the same work 4. causing the load to move a greater distance |
3. requiring less total energy to do
the same work |
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1-50. Relative to the center of revolution,
the direction of (a) centrifugal force and (b) centripetal force is in what direction? 1. (a) Away from (b) toward 2. (a) Toward (b) away from 3. (a) Away from (b) away from 4. (a} Toward (b) toward |
2. (a) Toward (b) away from
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1-51. Refer to the force formula given in
your textbook on rotational motion. Which of the following statements is correct concerning centripetal and centrifugal forces as shown by this formula? 1. The forces involved are inversely proportional to mass and velocity, and are directly proportional to radius 2. The forces involved are directly proportional to mass and independent of radius 3. The smaller the radius or the greater the mass, the smaller the forces involved 4. The smaller the radius or the greater the mass, the larger the forces involved |
4. The smaller the radius or the
greater the mass, the larger the forces involved |
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1-52. The velocity of a wave depends on
which of the following factors? 1. Frequency of the wave 2. Amplitude of the disturbance within the wave 3. The distance between the crests of two adjacent waves 4. The type of wave and the medium through which it travels |
4. The type of wave and the medium
through which it travels |
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1-53. A single disturbance induced into a
medium is known as a 1. pulse train 2. wave pulse 3. wave train 4. wave |
2. wave pulse
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1-54. Which of the following terms defines
a wave as having the disturbance take place at right angles to the direction of wave travel? 1. Periodic 2. Compressional 3. Transverse 4. Longitudinal |
3. Transverse
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1-55. Which of the following is an example
of waves that are both transverse and longitudinal? 1. Water waves 2. Sound waves 3. Light waves 4. Electromagnetic waves |
1. Water waves
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1-56. When a wave strikes a flat reflecting
surface, the angle of incidence is the angle between the path of the arriving wave and 1. an imaginary line perpendicular to the reflecting surface at the point of impact 2. an imaginary line perpendicular to the path of the reflected wave 3. the reflecting surface at the point of impact 4. the path of the reflected wa |
1. an imaginary line perpendicular
to the reflecting surface at the point of impact |
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1-57. Which of the following is a
requirement for total reflection to take place? 1. A zero angle of incidence 2 The angle of incidence is smaller than the critical angle 3. The angle of incidence is equal to the critical angle 4. The angle of incidence is larger than the critical angle |
4. The angle of incidence is larger
than the critical angle |
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1-58. The most diffraction will occur when
sound is at which of the following frequencies? 1. 100 Hz 2. 1000 Hz 3. 4444 Hz 4, 8888 Hz |
1. 100 Hz
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1-59. Doppler is the effect on waves
produced by 1. Loss of energy within the wave due to absorption by the medium 2. successive media having different velocities of propagation 3. relative motion between the wave source and the detector 4. interaction between two waves at the same frequency traveling in opposite directions in the same medium |
3. relative motion between the wave
source and the detector |
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1-60. The theory of radiation of energy
treats radio, radar, and heat waves as belonging to the same general form of energy. What is the principle difference between these waves? 1. Phase 2. Polarity 3. Frequency 4. Magnitude |
3. Frequency
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1-61. Which of the following is a
description of the transfer of heat by convection? 1. Electromagnetic wave travel 2 Heating a substance that flows when heated 3. Molecular action whereby molecules transfer heat to adjacent molecules by collision |
2 Heating a substance that flows
when heated |
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1-62. Consideration of the heat transfer
principle of radiation reveals that radiant heat has which of the following characteristics? 1. It moves at the speed of light 2. It always travels in a straight line 3. It may pass through a medium without heating it 4. Each of the above |
4. Each of the above
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1-63. At what temperature does the
Fahrenheit and Celsius scales coincide? 1. Boiling 2. Freezing 3. Zero 4. 40° below zero |
4. 40° below zero
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1-64. What two temperature scales have
their zero points corresponding to absolute zero? 1. Kelvin and Rankine 2. Celsius and Kelvin 3. Fahrenheit and Rankine 4. Celsius and Fahrenheit |
1. Kelvin and Rankine
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1-65. Copper wires are not used for
conductors through the glass envelopes of electron tubes for which of the following reasons? 1. Copper and glass have the same expansion rate 2. Copper and glass do not have the same expansion rate 3. Copper has a positive coefficient of expansion while glass has a negative coefficient 4. Copper has a negative coefficient of expansion while glass has a positive coefficient |
2. Copper and glass do not have the
same expansion rate |
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1-66. The total increase in size of an
object when heated depends on the amount of temperature change and which of the following factors? 1. Its original size 2. Its coefficient of expansion 3. Both 2 and 3 above 4. Its average weight |
2. Its coefficient of expansion
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1-67. A steel plate 1 foot square has a
inch diameter hole through its center. What, if anything, happens to the area of the hole as the plate is heated? 1. It decreases at approximately same rate as the expanding steel 2. It decreases slightly, but the amount is not predictable 3. It Increases at approximately same rate as the expanding steel 4. Nothing; it remains the same since it cannot be heated |
3. It Increases at approximately the
same rate as the expanding steel |
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1-68. For some uses, solid thermometers
are more suitable than liquid-filled thermometers for which of the following reasons? 1. Liquid thermometers have a limited temperature range 2. The vapor pressure of liquid is not sufficient at high temperatures 3. Atmospheric pressure changes affect the reading of liquid thermometers 4. The freezing point of most liquids is too low |
1. Liquid thermometers have a
limited temperature range |
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1-69. For each Btu of heat added to 1
pound of water, the temperature will increase by what number of degrees? 1. 0.252°F 2. 1°F 3. 1°C 4. 252°C |
2. 1°F
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1-70. Refer to table l-6 in your text.
When equal amounts of heat are applied to equal masses of the following materials, which of them will have the greatest increase in temperature? 1. Copper 2. Glass 3. Silver 4. Water |
4. Water
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1-71. The heat required to change a solid
into a liquid with no change in temperature is known as the heat of 1. fusion 2. combustion 3. condensation 4. vaporization |
1. fusion
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1-73 Some substances characteristically transmit almost all the light striking them,others transmit only part of it,and still others transmit none. Substances that exhibit these characteristics are known, respectiviely, as being
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1. gaseous, fluid, solid
2. absorbent, passive, clear 3. transparent, translucent, opaque 4. luminous, reflective, cloudy |
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IN ANSWERING QUESTIONS 2-1 THROUGH 2-3,
SELECT FROM COLUMN B THE MEASUREMENT WHICH MAY BE EXPRESSED BY EACH OF THE UNITS LISTED IN COLUMN A. ALL ANSWERS ARE NOT USED. 2-1. Candlepower |
2. Luminous
intensity |
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2-2. Footcandle,
lux, phot |
4. Illumination
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2-3. Lambert, footlambert
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1. Luminance
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2-4. Of several transparent substances,
which one has the largest index of refraction? 1. The one with the greatest thickness 2. The one with the most curvature of its surface 3. The one in which light travels the slowest 4. The one that the light strikes nearest the perpendicular to its surface |
1. The one with the greatest
thickness |
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2-5. A simple lens that is thicker in the
center than at the edges is known as a 1. positive or convergent lens 2. positive or divergent lens 3. negative or convergent lens 4. negative or divergent lens |
1. positive or convergent lens
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2-6. In a given medium, the color of a
light wave is determined by which of the following factors? 1. The wavelength only 2. The frequency only 3. The speed of travel and the frequency 4. The speed of travel and the wavelength |
2. The frequency only
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2-7. Of the several factors affecting
sound velocity in any medium, which ones have the greatest effect? 1. Pressure and temperature of the medium 2. Density and elasticity of the medium 3. Frequency and amplitude of the sound waves 4. Intensity and pitch of the sound wave |
2. Density and elasticity of the
medium |
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2-8. What is the minimum change in the
sound level that the human ear can detect? 1. 0.1 dB 2. 1.0 dB 3. 1.0 bel 4. 10.0 bels |
2. 1.0 dB
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2-9. When using the following formula:
dB = 10 X log (P2 ÷ P1), your result is a negative decibel value. What does the negative value indicate? 1. The values used for P2 and P1 were transposed 2. P1 is less than P2 3. A loss in power 4. A gain in power |
3. A loss in power
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2-10. The audio power output from a speaker
would double if the sound intensity were increased by what amount? 1. 1 dB 2. 10 dB 3. 3 dB 4. 30 dB |
3. 3 dB
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2-11. What does a vu meter indicate?
1. The number of decibels above or below the input reference volume level 2. The amount of deviation in decibels from 1 milliwatt of power 3. The amount of power dissipated in a load resistance of 660 ohms 4. The multiple of 0.7746 X 600 variation above or below 1 milliwatt |
1. The number of decibels above or
below the input reference volume level |
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2-12 Sound waves striking a highly reflective surface
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2. Echo
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2-13. Multiple
reflections of sound waves between several reflective surfaces |
4. Reverberation
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2-14. Two sound waves of slightly
different frequency moving in the same direction |
1. Beat note
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2-15. A vibrating force applied to an
object at the object’s natural vibrating frequency |
3. Resonance
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