Exam Primer

Overview
1. Regulations and Policies
  • Authority and Regulations
  • Licence
  • License Penalties
  • Certificate
  • Operation, Repair
  • Content Restrictions
  • Operating Restrictions
  • Interference
  • Emergencies
  • Non-remuneration, Privacy
  • Call Signs
  • Other Countries
  • Frequency Bands
  • Power Allowed
  • unmodulated carriers, retransmission
  • amplitude modulation, frequency stability, me
  • International Telecommunication Union (ITU)
  • Exams
  • Antenna Structures
  • RF Field Strength
  • Resolving Complaints
  • 2. Operating and Procedures
  • VHF/UHF Repeaters - Voice
  • Phonetic Alphabet
  • Voice Operating Procedures
  • tuning, testing and dummy loads
  • Morse Code (CW) procedures
  • RST signal reporting, S meter
  • Q Signals
  • Emergency Operating Procedures
  • Record Keeping, Antenna Orientation and Maps
  • 3. Station Assembly, Practice and Safety
  • Layout of HF Stations
  • Layout of FM Transmitters
  • Layout of FM Receivers
  • Layout of CW Transmitters
  • Layout of SSB/CW receivers
  • Layout of SSB Transmitters
  • Layout of Digital Systems
  • Layout of Regulated Power Supplies
  • Layout of Yagi-Uda Antennas
  • Receiver Fundamentals
  • Transmitter, carrier, keying, AM
  • Carrier Suppression, SSB
  • Frequency and Phase Modulation
  • Station Accessories
  • Digital Modes
  • Batteries
  • Power Supplies
  • Electrical Safety
  • Antenna and Tower Safety
  • RF Exposure Safety
  • 4. Circuit Components
  • Amplifier Fundamentals
  • Diodes
  • Bipolar Transistors
  • Field-effect Transistors
  • Tiode Vacuum Tubes
  • Resister Color Codes
  • 5. Basic Electronics and Theory
  • Metric Prefixes
  • Basic Concepts
  • Circuits
  • Ohm's law
  • Series and Parallel Resistors
  • Power law, Resister Power Disipation
  • AC and frequency
  • Ratios, Logarithms and Decibels
  • Inductance and Capacitance
  • Reactance and Impedance
  • Magnetica and Transformers
  • Resonance and Tuned Circuits
  • Meters and Measurements
  • 6. Feedlines and Antenna Systems
  • Impedance and Feedlines
  • Balanced and Unbalanced feedlines
  • Feedlines and Connectors
  • Line Losses
  • Standing Wave Ratio
  • Impedance Matching
  • Isotropic Sources, Polarization
  • Wavelength vs Physical Length
  • Antenna Radiation Patterns
  • Vertical Antennas
  • Yagi Antennas
  • Wire Antennas
  • Quad/loop Antennas
  • 7. Radio Wave Propagation
  • Propogation Types
  • Ionospheric Regions
  • Hops and Skips
  • Ionosphere Issues
  • Solar Activity
  • MF and HF and Skywaves
  • VHF and UHF, Sporadic-E, Aurira, Ducting
  • Scatter - HF, VHF, UHF
  • 8. Interference and Suppression
  • Front-end overload
  • Audio Rectification, Bypass Capacitors, Ferri
  • Intermodulation, Spurious, Key-clicks
  • Harmonics, Splatter, Transmitter Adjustments
  • Filters
  • 3.18 Electrical Safety

    Practice


    B-003-18-01
    How could you best keep unauthorized persons from using your amateur station at home?
    Use a key-operated on/off switch in the main power line
    Use a carrier-operated relay in the main power line
    Put a "Danger High Voltage" sign in the station
    Put fuses in the main power line

    B-003-18-02
    How could you best keep unauthorized persons from using a mobile amateur station in your car?
    Tune the radio to an unused frequency when you are done using it
    Turn the radio off when you are not using it
    Disconnect the microphone when you are not using it
    Put a "Do not touch" sign on the radio

    B-003-18-03
    Why would you use a key- operated on/off switch in the main power line of your station?
    For safety, in case the main fuses fail
    To keep the power company from turning off your electricity during an emergency
    For safety, to turn off the station in the event of an emergency
    To keep unauthorized persons from using your station

    B-003-18-04
    Why would there be a switch in a highvoltage power supply to turn off the power if its cabinet is opened?
    To keep anyone opening the cabinet from getting shocked by dangerous high voltages
    To keep dangerous RF radiation from leaking out through an open cabinet
    To keep dangerous RF radiation from coming in through an open cabinet
    To turn the power supply off when it is not being used

    B-003-18-05
    How little electrical current flowing through the human body can be fatal?
    Approximately 10 amperes
    More than 20 amperes
    Current flow through the human body is never fatal
    As little as 1/10 of an ampere

    B-003-18-06
    Which body organ can be fatally affected by a very small amount of electrical current?
    The heart
    The brain
    The liver
    The lungs

    B-003-18-07
    What is the minimum voltage which is usually dangerous to humans?
    100 volts
    1000 volts
    2000 volts
    30 volts

    B-003-18-08
    What should you do if you discover someone who is being burned by high voltage?
    Wait for a few minutes to see if the person can get away from the high voltage on their own, then try to help
    Immediately drag the person away from the high voltage
    Turn off the power, call for emergency help and give CPR if needed
    Run from the area so you won't be burned too

    B-003-18-09
    What is the safest method to remove an unconscious person from contact with a high voltage source?
    Turn off the high voltage switch beforere moving the person from contact with the source
    Wrap the person in a blanket and pull him to a safe area
    Call an electrician
    Remove the person by pulling an arm or a leg

    B-003-18-10
    Before checking a fault in a mains operated power supply unit, it would be safest to First:
    turn off the power and remove power plug
    short out leads of filter capacitor
    check action of capacitor bleeder resistance
    remove and check fuse from power supply

    B-003-18-11
    Fault finding in a power supply of an amateur transmitter while the supply is operating is not a recommended technique because of the risk of:
    electric shock
    damaging the transmitter
    overmodulation
    blowing the fuse

    B-003-19-01
    For best protection from electrical shock, what should be grounded in an amateur station?
    The antenna feed line
    All station equipment
    The AC power line
    The power supply primary

    B-003-19-02
    If a separate ground system is not possible for your amateur station, an alternative indoor grounding point could be:
    a metallic cold water pipe
    a plastic cold water pipe
    a window screen
    a metallic natural gas pipe

    B-003-19-03
    To protect you against electrical shock, the chassis of each piece of your station equipment should be connected to:
    a good ground connection
    a dummy load
    insulated shock mounts
    the antenna

    B-003-19-04
    Which of these materials is best for a ground rod driven into the earth?
    Hard plastic
    Iron or steel
    Fiberglass
    Copper-clad steel

    B-003-19-06
    Where should the green wire in a threewire AC line cord be connected in a power supply?
    To the white wire
    To the "hot" side of the power switch
    To the chassis
    To the fuse

    B-003-19-07
    If your third-floor amateur station has a ground wire running 10.05 metres (33 feet) down to a ground rod, why might you get an RF burn if you touch the front panel of your HF transceiver?
    Because of a bad antenna connection, allowing the RF energy to take an easier path out of the transceiver through you
    Because the transceiver's heat-sensing circuit is not working to start the cooling fan
    Because the ground wire is a resonant length on several HF bands and acts more like an antenna than an RF ground connection
    Because the ground rod is not making good contact with moist earth

    B-003-19-08
    What is one good way to avoid stray RF energy in your amateur station?
    Make a couple of loops in the ground wire where it connects to your station
    Drive the ground rod at least 420 cm (14 feet) into the ground
    Keep the station's ground wire as short as possible
    Use a beryllium ground wire for best conductivity

    B-003-19-09
    Which statement about station grounding is true?
    A ground loop is an effective way to ground station equipment
    If the chassis of all station equipment is connected with a good conductor, there is no need to tie them to an earth ground
    RF hot spots can occur in a station located above the ground floor if the equipment is grounded by a long ground wire
    The chassis of each piece of station equipment should be tied together with high- impedance conductors

    B-003-19-10
    On mains operated power supplies, the ground wire should be connected to the metal chassis of the power supply. This ensures, in case there is a fault in the power supply, that the chassis:
    does not become conductive to prevent electric shock
    becomes conductive to prevent electric shock
    develops a high voltage compared to the ground
    does not develop a high voltage with respect to the ground

    B-003-19-11
    The purpose of using a three- wire power cord and plug on amateur radio equipment is to:
    prevent the plug from being reversed in the wall outlet
    prevent the chassis from becoming live in case of an internal short to the chassis
    prevent short circuits
    make it inconvenient to use