Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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T3A01 What should you do if another operator
reports that your station's 2 meter signals were strong just a moment ago, but now they are weak
or distorted?
a. | Change the batteries in your radio to a different
type | c. | Ask the other operator to adjust his squelch
control | b. | Turn on the CTCSS tone | d. | Try moving a few
feet or changing the direction of your antenna if possible, as reflections may be causing multi-path
distortion |
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2.
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T3A02 Why might the range of VHF and UHF
signals be greater in the winter?
a. | Less ionospheric absorption | c. | Less solar activity | b. | Less absorption by
vegetation | d. | Less tropospheric absorption |
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3.
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T3A03 What antenna
polarization is normally used for long-distance weaksignal CW and SSB contacts using the VHF and UHF
bands? a. | Right-hand circular | c. | Horizontal | b. | Left-hand
circular | d. | Vertical |
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4.
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T3A04 What can
happen if the antennas at opposite ends of a VHF or UHF line of sight radio link are not using the
same polarization? a. | The modulation sidebands might become
inverted | c. | Signals have an echo effect on
voices | b. | Signals could be significantly
weaker | d. | Nothing significant will happen |
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5.
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T3A05 When using a
directional antenna, how might your station be able to access a distant repeater if buildings or
obstructions are blocking the direct line of sight path? a. | Change from vertical to horizontal
polarization | c. | Try the long path | b. | Try to find a path that reflects signals to the
repeater | d. | Increase the antenna SWR |
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6.
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T3A06 What term is commonly used to describe
the rapid fluttering sound sometimes heard from mobile stations that are moving while
transmitting?
a. | Flip-flopping | c. | Frequency shifting | b. | Picket
fencing | d. | Pulsing |
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7.
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T3A07 What type of wave carries radio signals
between transmitting and receiving stations?
a. | Electromagnetic | c. | Surface acoustic | b. | Electrostatic | d. | Ferromagnetic |
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8.
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T3A08 Which of the following is a likely cause of
irregular fading of signals received by ionospheric reflection?
a. | Frequency shift due to Faraday
rotation | c. | Random combining of signals arriving via different
paths | b. | Interference from
thunderstorms | d. | Intermodulation distortion |
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9.
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T3A09 Which of the following results from the
fact that skip signals refracted from the ionosphere are elliptically polarized?
a. | Digital modes are unusable | c. | FM voice is unusable | b. | Either vertically
or horizontally polarized antennas may be used for transmission or
reception | d. | Both the transmitting and receiving antennas must be of the same
polarization |
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10.
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T3A10 What may occur if data signals arrive
via multiple paths?
a. | Transmission rates can be increased by a factor equal to
the number of separate paths observed | c. | No
significant changes will occur if the signals are transmitted using FM | b. | Transmission rates must be decreased by a factor equal to the number of
separate paths observed | d. | Error rates are likely to
increase |
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11.
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T3A11 Which part of the atmosphere enables
the propagation of radio signals around the world?
a. | The stratosphere | c. | The
ionosphere | b. | The
troposphere | d. | The magnetosphere |
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12.
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T3A12 How might fog and light rain affect
radio range on the 10 meter and 6 meter bands?
a. | Fog and rain absorb these wavelength
bands | c. | Fog and rain will deflect these
signals | b. | Fog and light rain will have little effect on these
bands | d. | Fog and rain will increase radio range |
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13.
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T3A13 What weather condition would decrease range
at microwave frequencies?
a. | High winds | c. | Precipitation | b. | Low barometric
pressure | d. | Colder temperatures |
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