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55 Cards in this Set

  • Front
  • Back
What is the major advantage of the
telegraph over earlier methods of
communication?
1. Range
2. Speed
3. Security
4. Reliabilityrd
2. Speed
The spreading out of radio waves is
referred to as propagation and is used in
which of the following Navy equipment?
1. Detection
2. Communication
3. Radar and navigation
4. Each of the above
4. Each of the above
Radio-frequency waves CANNOT be
seen for which of the following reasons?
1. Because radio-frequency energy is
low powered
2. Because radio-frequency waves are
below the sensitivity range of the
human eye
3. Because the human eye detects only
magnetic energy
4. Because radio-frequency waves are
above the sensitivity range of the
human eye
2. Because radio-frequency waves are
below the sensitivity range of the
human eye
Radio waves travel at what speed?
1. Speed of sound
2. Speed of light
3. Speed of the Earth's rotation
4. Speed of the Earth's orbit around the
sun
2. Speed of light
Which of the following types of energy
CANNOT be seen, heard, or felt?
1. Radio waves
2. Sound waves
3. Heat waves
4. Light waves
1. Radio waves
A stone dropped into water creates a
series of expanding circles on the surface
of the water. This is an example of which
of the following types of wave motion?
1. Transverse
2. Concentric
3. Longitudinal
4. Compression0
1. Transverse
A sound wave that moves back and forth
in the direction of propagation is an
example of which of the following types
of wave motion?
1. Composite
2. Concentric
3. Transverse
4. Longitudinale
4. Longitudinal
Which of the following terms is used for
the vehicle through which a wave travels
from point to point?
1. Medium
2. Source
3. Detector
4. Receivershockwav
1. Medium
Which of the following is NOT an
element necessary to propagate sound?
1. Medium
2. Source
3. Detector
4. Reference
4. Reference
If a wave has a velocity of 4,800 feet per
second and a wave-length of 5 feet, what
is the frequency of the wave?
1. 9.6 Hz
2. 96 Hz
3. 960 Hz
4. 9,600 Hz
3. 960 Hz

f = v/wavelength
f = 4800/5 = 960Hz
Which of the following statements about
a wave is the law of reflection?
1. The angle of incidence is equal to the
refracted wave
2. The angle of incidence is not equal to
the refracted wave
3. The angle of incidence is equal to the
angle of reflection
4. The angle of incidence is not equal to
the angle of reflection
1. The angle of incidence is equal to the
refracted wave
The reception of an AM-band radio
signal over mountains can be explained
by which of the following principles of
wave propagation?
1. Reflection
2. Refraction
3. Diffraction
4. Doppler effect
3. Diffraction
What wave propagation principle
accounts for the apparent increase in
frequency as a train whistle approaches
and the apparent decrease in frequency as
it moves away?
1. Refraction
2. Reflection
3. Diffraction
4. Doppler effect
4. Doppler effect‚
What are the three audible frequency
ranges?
1. Subsonic, sonic, and supersonic
2. Infrasonic, sonic, and ultrasonic
3. Infrasonic, subsonic, and ultrasonic
4. Infrasonic, subsonic, and supersonic
2. Infrasonic, sonic, and ultrasonic
If a bell is placed in a jar and the air in
the jar is replaced with a gas of a higher
density, what is the effect, if any, on the
speed of the sound when the bell is rung?
1. The sound stops
2. The sound travels faster
3. The sound travels slower
4. The sound is not affected
3. The sound travels slower
Varying which of the following wave
characteristics will cause the length of
sound waves to vary?
1. Phase
2. Quality
3. Amplitude
4. Frequency
4. Frequency
What are the three basic characteristics
of sound?
1. Amplitude, intensity, and quality
2. Amplitude, pitch, and tone
3. Pitch, intensity, and quality
4. Pitch, frequency, and quality
3. Pitch, intensity, and quality
If several musical instruments are
playing the same note, you should be
able to distinguish one instrument from
another because of which of the
following characteristics of sound?
1. Quality
2. Overtones
3. Frequency
4. Intensity
1. Quality
Through which of the following
mediums will sound travel fastest, at the
indicated temperature?
1. Air at 68º F
2. Lead at 20º C
3. Steel at 32º F
4. Steel at 20º C
4. Steel at 20º C
In sound terminology, which of the
following terms is the same as a wave
reflection?
1. Echo
2. Image
3. Acoustics
4. Refractionrd
1. Echo
Multiple reflections of sound waves are
referred to as
1. noise
2. acoustics
3. interference
4. reverberation9
4. reverberation
Two out-of-phase waves of the same
frequency that are moving through the
same medium are said to present which
of the following types of interference?
1. Additive
2. Constructive
3. Both 1 and 2 above
4. Subtractivei
4. Subtractive
A cavity that vibrates at its own natural
frequency and produces a sound that is
louder than at other frequencies is
demonstrating which of the following
sound characteristics?
1. Noise
2. Quality
3. Resonance
4. Reverberation
3. Resonance
Energy in the form of light can be
produced through which of the following
means?
1. Chemical
2. Electrical
3. Mechanical
4. Each of the abovey
4. Each of the above
The scientist, J. C. Maxwell, developed
the theory that small packets of
electromagnetic energy called photons
produce
1. sound
2. noise
3. echoes
4. light>
4. light
Varying which of the following wave
characteristics will cause the length of
sound waves to vary?
1. Phase
2. Quality
3. Amplitude
4. Frequency
4. Frequency
What are the three basic characteristics
of sound?
1. Amplitude, intensity, and quality
2. Amplitude, pitch, and tone
3. Pitch, intensity, and quality
4. Pitch, frequency, and quality
3. Pitch, intensity, and quality
If several musical instruments are
playing the same note, you should be
able to distinguish one instrument from
another because of which of the
following characteristics of sound?
1. Quality
2. Overtones
3. Frequency
4. Intensity
1. Quality
Through which of the following
mediums will sound travel fastest, at the
indicated temperature?
1. Air at 68º F
2. Lead at 20º C
3. Steel at 32º F
4. Steel at 20º C
4. Steel at 20º C
In sound terminology, which of the
following terms is the same as a wave
reflection?
1. Echo
2. Image
3. Acoustics
4. Refractionrd
1. Echo
Multiple reflections of sound waves are
referred to as
1. noise
2. acoustics
3. interference
4. reverberation9
4. reverberation
Two out-of-phase waves of the same
frequency that are moving through the
same medium are said to present which
of the following types of interference?
1. Additive
2. Constructive
3. Both 1 and 2 above
4. Subtractivei
4. Subtractive
A cavity that vibrates at its own natural
frequency and produces a sound that is
louder than at other frequencies is
demonstrating which of the following
sound characteristics?
1. Noise
2. Quality
3. Resonance
4. Reverberation
3. Resonance
Energy in the form of light can be
produced through which of the following
means?
1. Chemical
2. Electrical
3. Mechanical
4. Each of the abovey
4. Each of the above
The scientist, J. C. Maxwell, developed
the theory that small packets of
electromagnetic energy called photons
produce
1. sound
2. noise
3. echoes
4. light>
4. light
What is the major advantage of the
telegraph over earlier methods of
communication?
1. Range
2. Speed
3. Security
4. Reliabilityrd
2. Speed
The spreading out of radio waves is
referred to as propagation and is used in
which of the following Navy equipment?
1. Detection
2. Communication
3. Radar and navigation
4. Each of the above
4. Each of the above
Radio-frequency waves CANNOT be
seen for which of the following reasons?
1. Because radio-frequency energy is
low powered
2. Because radio-frequency waves are
below the sensitivity range of the
human eye
3. Because the human eye detects only
magnetic energy
4. Because radio-frequency waves are
above the sensitivity range of the
human eye
2. Because radio-frequency waves are
below the sensitivity range of the
human eye
Radio waves travel at what speed?
1. Speed of sound
2. Speed of light
3. Speed of the Earth's rotation
4. Speed of the Earth's orbit around the
sun
2. Speed of light
Which of the following types of energy
CANNOT be seen, heard, or felt?
1. Radio waves
2. Sound waves
3. Heat waves
4. Light waves
1. Radio waves
What causes sunlight to separate into
different wavelengths and display a
rainbow of colors when passed through a
prism?
1. Refraction
2. Reflection
3. Dispersion
4. Diffraction
3. Dispersion
The sun, gas flames, and electric light
filaments are visible because they are
1. opaque
2. transparent
3. nonluminous
4. self-luminous
4. self-luminous
Substances that transmit almost all of the
light waves falling upon them possess
which of the following properties?
1. Opaqueness
2. Transparence
3. Translucence
4. Self-luminationu/imag
2. Transparence
Some substances are able to transmit
light waves but objects cannot be seen
through them. Which of the following
properties does this statement describe?
1. Opaqueness
2. Transparence
3. Translucence
4. Self-lumination
2. Transparence
The speed of light depends on the
medium through which light travels. For
which of the following reasons does light
travel through empty space faster than
through an object such as glass?
1. Space is less dense than glass
2. Space is more dense than glass
3. Glass reflects the light back to the
source
4. Glass refracts the light, causing
1. Space is less dense than glass
If a light wave strikes a sheet of glass at a
perpendicular angle, what is the effect, if
any, on the light wave?
1. The wave is completely absorbed
2. The wave is reflected back toward the
source
3. The wave is refracted as it passes
through the glass
4. The wave is unchanged and continues
in a straight line
4. The wave is unchanged and continues
in a straight line
The amount of absorption of the light
that strikes an object is determined by the
object’s
1. color
2. purity
3. density
4. complexity
1. color
In a comparison of waves of light and
sound as they travel from an air into
water, how is the speed of (a) light waves
and (b) sound waves affected?
1. (a) Increased (b) increased
2. (a) Increased (b) decreased
3. (a) Decreased (b) decreased
4. (a) Decreased (b) increased
4. (a) Decreased (b) increased
Which of the following waves are NOT a
form of electromagnetic energy?
1. Heat waves
2. Sound waves
3. Light waves
4. Radio wavesrd
2. Sound waves
The electromagnetic spectrum represents
the entire range of electromagnetic waves
arranged in the order of their
1. color
2. frequency
3. visibility
4. applica
2. frequency
Which of the following portions of the
frequency spectrum contains the highest
frequency?
1. X-ray
2. Radar
3. Light
4. Cosmic
4. Cosmic
Which of the following electronic
devices is used to radiate and/or collect
electromagnetic waves?
1. Antenna
2. Receiver
3. Transmitter
4. Transmission line Keep
1. Antenna
The electric field and magnetic field
combine to form which of the following
types of waves?
1. Spherical
2. Elliptical
3. Electromagnetic
4. Each of the abovesh,
3. Electromagnetic
The magnetic field radiated from an
antenna is produced by what electrical
property?
1. Voltage
2. Current
3. Reactance
4. Resistancey
2. Current
The electric field radiated from an
antenna is produced by what electrical
property?
1. Voltage
2. Current
3. Reactance
4. Resistancey
1. Voltage