ARRL Day 4.txt
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Which of the following is common practice during net operations to get the immediate attention of the net control station when reporting an emergency?
A. Repeat the words SOS three times followed by the call sign of the reporting station
B. Press the push-to-talk button three times
C. Begin your transmission with “Priority” or “Emergency” followed by your call sign
D. Play a pre-recorded emergency alert tone followed by your call sign
When may an amateur station use any means of radio communications at its disposal for essential communications in connection with immediate safety of human life and protection of property?
A. Only when FEMA authorizes it by declaring an emergency
B. When normal communications systems are not available
C. Only when RACES authorizes it by declaring an emergency
D. Only when authorized by the local MARS program director
What should you do to minimize disruptions to an emergency traffic net once you have checked in?
A. Whenever the net frequency is quiet, announce your call sign and location
B. Move 5 kHz away from the net's frequency and use high power to ask other hams to keep clear of the net frequency
C. Do not transmit on the net frequency until asked to do so by the net control station
D. Wait until the net frequency is quiet, then ask for any emergency traffic for your area
What set of rules applies to proper operation of your station when using amateur radio at the request of public service officials?
A. RACES Rules
B. ARES Rules
C. FCC Rules
D. FEMA Rules
What is the Radio Amateur Civil Emergency Service?
A. An emergency radio service organized by amateur operators
B. A radio service using amateur stations for emergency management or civil defense communications
C. A radio service organized to provide communications at civic events
D. A radio service organized by amateur operators to assist non-military persons
What do RACES and ARES have in common?
A. They represent the two largest ham clubs in the United States
B. Both organizations broadcast road and weather traffic information
C. Neither may handle emergency traffic supporting public service agencies
D. Both organizations may provide communications during emergencies
What is the preamble in a formal traffic message?
A. The first paragraph of the message text
B. The message number
C. The priority handling indicator for the message
D. The information needed to track the message as it passes through the amateur radio traffic handling system
What is usually considered to be the most important job of an amateur operator when handling emergency traffic messages?
A. Passing messages exactly as written, spoken or as received
B. Estimating the number of people affected by the disaster
C. Communicating messages to the news media for broadcast outside the disaster area
D. Broadcasting emergency information to the general public
What is meant by the term "check" in reference to a formal traffic message?
A. The check is a count of the number of words or word equivalents in the text portion of the message
B. The check is the value of a money order attached to the message
C. The check is a list of stations that have relayed the message
D. The check is a box on the message form that tells you the message was received
What is a usual name for electromagnetic waves that travel through space?
A. Gravity waves
B. Sound waves
C. Radio waves
D. Pressure waves
What is the radio horizon?
A. The distance at which radio signals between two points are effectively blocked by the curvature of the Earth
B. The distance from the ground to a horizontally mounted antenna
C. The farthest point you can see when standing at the base of your antenna tower
D. The shortest distance between two points on the Earth's surface
Why do VHF and UHF radio signals usually travel somewhat farther than the visual line of sight distance between two stations?
A. Radio signals move somewhat faster than the speed of light
B. Radio waves are not blocked by dust particles
C. The Earth seems less curved to radio waves than to light
D. Radio waves are blocked by dust particles
What is meant by the term "knife-edge" propagation?
A. Signals are reflected back toward the originating station at acute angles
B. Signals are sliced into several discrete beams and arrive via different paths
C. Signals are partially refracted around solid objects exhibiting sharp edges
D. Signals propagated close to the band edge exhibiting a sharp cutoff
What mode is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis?
A. Tropospheric scatter
B. D layer refraction
C. F2 layer refraction
D. Faraday rotation
What causes "tropospheric ducting"?
A. Discharges of lightning during electrical storms
B. Sunspots and solar flares
C. Updrafts from hurricanes and tornadoes
D. Temperature inversions in the atmosphere
What is a characteristic of VHF signals received via auroral reflection? . Signals from distances of 10,000 or more miles are common
B. The signals exhibit rapid fluctuations of strength and often sound distorted
C. These types of signals occur only during winter nighttime hours
D. These types of signals are generally strongest when your antenna is aimed to the south (for stations in the Northern Hemisphere)
What band is best suited to communicating via meteor scatter?
A. 10 meters
B. 6 meters
C. 2 meters
D. 70 cm
Which part of the atmosphere enables the propagation of radio signals around the world?
A. The stratosphere
B. The troposphere
C. The ionosphere
D. The magnetosphere
Which of the following might be happening when VHF signals are being received from long distances?
A. Signals are being reflected from outer space
B. Signals are arriving by sub-surface ducting
C. Signals are being reflected by lightning storms in your area
D. Signals are being refracted from a sporadic E layer
What is generally the best time for long-distance 10 meter band propagation?
A. During daylight hours
B. During nighttime hours
C. When there are coronal mass ejections
D. Whenever the solar flux is low
Which of the following is a common effect of "skip" reflections between the Earth and the ionosphere?
A. The sidebands become reversed at each reflection
B. The polarization of the original signal is randomized
C. The apparent frequency of the received signal is shifted by a random amount
D. Signals at frequencies above 30 MHz become stronger with each reflection
Which of the following propagation types is most commonly associated with occasional strong over-the-horizon signals on the 10, 6, and 2 meter bands?
B. Sporadic E
C. D layer absorption
D. Gray-line propagation
Why are "direct" (not via a repeater) UHF signals rarely heard from stations outside your local coverage area?
A. They are too weak to go very far
B. FCC regulations prohibit them from going more than 50 miles
C. UHF signals are usually not reflected by the ionosphere
D. They collide with trees and shrubbery and fade out
What is the cause of irregular fading of signals from distant stations during times of generally good reception?
A. Absorption of signals by the "D" layer of the ionosphere
B. Absorption of signals by the "E" layer of the ionosphere
C. Random combining of signals arriving via different path lengths
D. Intermodulation distortion in the local receiver
What is the FCC Part 97 definition of a space station?
A. Any multi-stage satellite
B. An Earth satellite that carries one of more amateur operators
C. An amateur station located less than 25 km above the Earth's surface
D. An amateur station located more than 50 km above the Earth's surface
Which amateur stations may make contact with an amateur station on the International Space Station using 2 meter and 70 cm band amateur radio frequencies?
A. Only members of amateur radio clubs at NASA facilities
B. Any amateur holding a Technician or higher class license
C. Only the astronaut's family members who are hams
D. You cannot talk to the ISS on amateur radio frequencies
Which of the following can be done using an amateur radio satellite?
A. Talk to amateur radio operators in other countries
B. Get global positioning information
C. Make telephone calls
D. All of these choices are correct
What do the initials LEO tell you about an amateur satellite?
A. The satellite battery is in Low Energy Operation mode
B. The satellite is performing a Lunar Ejection Orbit maneuver
C. The satellite is in a Low Earth Orbit
D. The satellite uses Light Emitting Optics
What can be used to determine the time period during which an amateur satellite or space station can be accessed?
A. A GPS receiver
B. A field strength meter
C. A telescope
D. A satellite tracking program
What is a satellite beacon?
A. The primary transmit antenna on the satellite
B. An indicator light that that shows where to point your antenna
C. A reflective surface on the satellite
D. A transmission from a space station that contains information about a satellite
What causes "spin fading" when referring to satellite signals?
A. Circular polarized noise interference radiated from the sun
B. Rotation of the satellite and its antennas
C. Doppler shift of the received signal
D. Interfering signals within the satellite uplink band
With regard to satellite communications, what is Doppler shift?
A. A change in the satellite orbit
B. A mode where the satellite receives signals on one band and transmits on another
C. An observed change in signal frequency caused by relative motion between the satellite and the earth station
D. A special digital communications mode for some satellites
What is meant by the statement that a satellite is operating in "mode U/V"?
A. The satellite uplink is in the 15 meter band and the downlink is in the 10 meter band
B. The satellite uplink is in the 70 cm band and the downlink is in the 2 meter band
C. The satellite operates using ultraviolet frequencies
D. The satellite frequencies are usually variable
How much transmitter power should be used on the uplink frequency of an amateur satellite or space station?
A. The maximum power of your transmitter
B. The minimum amount of power needed to complete the contact
C. No more than half the rating of your linear amplifier
D. Never more than 1 watt
What is the FCC Part 97 definition of telemetry?
A. An information bulletin issued by the FCC
B. A one-way transmission to initiate, modify or terminate functions of a device at a distance
C. A one-way transmission of measurements at a distance from the measuring instrument
D. An information bulletin from a VEC
What is the FCC Part 97 definition of telecommand?
A. An instruction bulletin issued by the FCC
B. A one-way radio transmission of measurements at a distance from the measuring instrument
C. A one-way transmission to initiate, modify or terminate functions of a device at a distance
D. An instruction from a VEC
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