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ARSGDAT.3BC
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1992-10-04
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6KB
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246 lines
;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\:
; :
; AMATEUR RADIO STUDY GUIDE v1.00 :
; :
; Copyright (c) 1992 David Drzyzga - All Rights Reserved :
; :
; Based on a program coded in BASIC by Russ Revels :
; :
;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\:
;
; You can include comments an the file anywhere you want
; just like these comments. You cannot put a comment in
; the middle of a line though.
;
; When modifying this file, there are several things you
; must be aware of:
;
; -> Any line of text in this file cannot exceed 65 characters!
; this is the 65th character^
;
; No harm will be done, but nothing over 65 characters will
; be read by the program.
;
; -> Do not make questions more than 20 lines long, or you
; will receive an 'out of memory' error when you execute
; the program.
;
; -> You can add or delete questions as you please, just be
; sure to follow the format of the existing questions.
;
;
;
(3BC-1.6)
What is the maximum distance along the earth's surface that can
normally be covered in one hop using the F2 layer?
C. Approximately 2500 miles
*
(3BC-1.7)
What is the maximum distance along the earth's surface that can
be covered in one hop using the E layer?
B. Approximately 1200 miles
*
(3BC-1.9)
What is the average height of maximum ionization of the E layer?
B. 70 miles
*
(3BC-1.10)
During what part of the day, and in what season of the year can
the F2 layer be expected to reach its maximum height?
A. At noon during the summer
*
(3BC-1.13)
What is the critical angle, as used in radio wave propagation?
D. The highest take off angle that will return a radio wave to
earth during specific ionospheric conditions
*
(3BC-2.3)
What is the main reason that the 160, 80, and 40 meter amateur
bands tend to be useful for only short-distance communications
during daylight hours?
C. Because of D-layer absorption
*
(3BC-2.4)
What is the principal reason the 160 meter through 40 meter
bands are useful for only short-distance radiocommunications
during daylight hours?
C. D-layer absorption
*
(3BC-3.3)
If the maximum usable frequency on the path from Minnesota to
Africa is 22-MHz, which band should offer the best chance for a
successful QSO?
B. 15 meters
*
(3BC-3.4)
If the maximum usable frequency on the path from Ohio to West
Germany is 17-MHz, which band should offer the best chance for a
successful QSO?
C. 20 meters
*
(3BC-5.1)
Over what periods of time do sudden ionospheric disturbances
normally last?
B. A few minutes to a few hours
*
(3BC-5.2)
What can be done at an amateur station to continue
radiocommunications during a sudden ionospheric disturbance?
A. Try a higher frequency
*
(3BC-5.3)
What effect does a sudden ionospheric disturbance have on the
daylight ionospheric propagation of HF radio waves?
B. Disrupts transmissions on lower frequencies more than those
on higher frequencies
*
(3BC-5.4)
How long does it take a solar disturbance that increases the
sun's ultraviolet radiation to cause ionospheric disturbances on
earth?
C. 8 minutes
*
(3BC-5.5)
Sudden ionospheric disturbances cause increased radio wave
absorption in which layer of the ionosphere?
A. D layer
*
(3BC-6.2)
What is a characteristic of backscatter signals?
B. A wavering sound
*
(3BC-6.4)
What makes backscatter signals often sound distorted?
D. The small part of the signal's energy scattered back to the
transmitter skip zone through several radio-wave paths
*
(3BC-6.5)
What is the radio wave propagation phenomenon that allows a
signal to be detected at a distance too far for ground wave
propagation but too near for normal sky wave propagation?
B. Scatter
*
(3BC-6.6)
When does ionospheric scatter propagation on the HF bands most
often occur?
A. When the sunspot cycle is at a minimum
*
(3BC-7.1)
What is solar flux?
B. The radio energy emitted by the sun
*
(3BC-7.2)
What is the solar-flux index?
D. A measure of solar activity that is taken daily
*
(3BC-7.3)
What is a timely indicator of solar activity?
A. The 2800-MHz solar flux index
*
(3BC-7.4)
What type of propagation conditions on the 15 meter band are
indicated by a solar-flux index value of 60 to 70?
D. Poor ionospheric propagation
*
(3BC-7.5)
A solar flux index in the range of 90 to 110 indicates what type
of propagation conditions on the 15 meter band?
D. Good ionospheric propagation
*
(3BC-7.6)
A solar flux index of greater than 120 would indicate what type
of propagation conditions on the 10 meter band?
A. Good ionospheric propagation
*
(3BC-7.7)
For widespread long distance openings on the 6 meter band, what
solar-flux index values would be required?
D. Greater than 250
*
(3BC-7.8)
If the MUF is high and HF radiocommunications are generally good
for several days, a similar condition can usually be expected
how many days later?
C. 28 days
*
(3BC-10.1)
What is a geomagnetic disturbance?
D. A dramatic change in the earth's magnetic field over a short
period of time
*
(3BC-10.2)
Which latitude paths are more susceptible to geomagnetic
disturbances?
A. Those greater than 45 degrees latitude
*
(3BC-10.3)
What can be the effect of a major geomagnetic storm on
radiocommunications?
B. Degraded high-latitude HF communications
*
(3BC-10.4)
How long does it take a solar disturbance that increases the
sun's radiation of charged particles to affect radio wave
propagation on earth?
D. 20 to 40 hours
*