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ELE2C
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1992-01-26
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FCC NOVICE Exam Question Pool. Subelement 2C.
Radio Wave Propagation. 1 Question.
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2C 1.1 A
What type of radio-wave propagation occurs when the signal
travels in a straight line from the transmitting antenna to
the receiving antenna?
A. Line-of-sight propagation
B. Straight-line propagation
C. Knife-edge diffraction
D. Tunnel propagation
2C 1.2 B
What path do radio waves usually follow from a transmitting
antenna to a receiving antenna at VHF and higher frequencies?
A. A bent path through the ionosphere
B. A straight line
C. A great circle path over either the north or south pole
D. A circular path going either east or west from the transmitter
2C 2.1 D
What type of propagation involves radio signals that travel
along the surface of the Earth?
A. Sky-wave propagation
B. Knife-edge diffraction
C. E-layer propagation
D. Ground-wave propagation
2C 2.2 B
What is the meaning of the term ground-wave propagation?
A. Signals that travel along seismic fault lines
B. Signals that travel along the surface of the earth
C. Signals that are radiated from a ground-plane antenna
D. Signals that are radiated from a ground station to a satellite
2C 2.3 B
Two amateur stations a few miles apart and separated by a low hill
blocking their line-of-sight path are communicating on 3.725 MHz.
What type of propagation is probably being used?
A. Tropospheric ducting
B. Ground wave
C. Meteor scatter
D. Sporadic E
2C 2.4 A
When compared to sky-wave propagation, what is the usual
effective range of ground-wave propagation?
A. Much smaller
B. Much greater
C. The same
D. Dependent on the weather
2C 3.1 A
What type of propagation uses radio signals refracted back
to earth by the ionosphere?
A. Sky wave
B. Earth-moon-earth
C. Ground wave
D. Tropospheric
2C 3.2 B
What is the meaning of the term sky-wave propagation?
A. Signals reflected from the moon
B. Signals refracted by the ionosphere
C. Signals refracted by water-dense cloud formations
D. Signals retransmitted by a repeater
2C 3.3 D
What does the term skip mean?
A. Signals are reflected from the moon
B. Signals are refracted by water-dense cloud formations
C. Signals are retransmitted by repeaters
D. Signals are refracted by the ionosphere
2C 3.4 A
What is the area of weak signals between the ranges of
ground waves and the first hop called?
A. The skip zone
B. The hysteresis zone
C. The monitor zone
D. The transequatorial zone
2C 3.5 C
What is the meaning of the term skip zone?
A. An area covered by skip propagation
B. The area where a satellite comes close to the earth, and
skips off the ionosphere
C. An area that is too far for ground-wave propagation, but
too close for skip propagation
D. The area in the atmosphere that causes skip propagation
2C 3.6 D
What type of radio-wave propagation makes it possible for
amateur stations to communicate long distances?
A. Direct-inductive propagation
B. Knife-edge diffraction
C. Ground-wave propagation
D. Sky-wave propagation
2C 4.1 C
How long is an average sunspot cycle?
A. 2 years
B. 5 years
C. 11 years
D. 17 years
2C 4.2 D
What is the term used to describe the long-term variation
in the number of visible sunspots?
A. The 11-year cycle
B. The Solar magnetic flux cycle
C. The hysteresis count
D. The sunspot cycle
2C 5.1 A
What affect does the number of sunspots have on the maximum
usable frequency (MUF)?
A. The more sunspots there are the higher the MUF will be
B. The more sunspots there are, the lower the MUF will be
C. The MUF is equal to the square of the number of sunspots
D. The number of sunspots effects the lowest usable frequency
(LUF) but not the MUF
2C 5.2 B
What affect does the number of sunspots have on the ionization
level in the atmosphere?
A. The more sunspots there are, the lower the ionization level
will be
B. The more sunspots there are, the higher the ionization level
will be
C. The ionization level of the ionosphere is equal to the square
root of the number of sunspots
D. The ionization level of the ionosphere is equal to the square
of the number of sunspots
2C 6.1 C
Why can a VHF or UHF radio signal that is transmitted toward a
mountain often be received at some distant point in a different
direction?
A. You can never tell what direction a radio wave is traveling in
B. These radio signals are easily bent by the ionosphere
C. These radio signals are easily reflected by objects in their
path
D. These radio signals are sometimes scattered in the ectosphere
2C 6.2 C
Why can the direction that a VHF or UHF radio signal is traveling
be changed if there is a tall building in the way?
A. You can never tell what direction a radio wave is traveling in
B. These radio signals are easily bent by the ionosphere
C. These radio signals are easily reflected by objects in their
path
D. These radio signals are sometimes scattered in the ectosphere
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End of Subelement 2C.