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

    • 5.4 Ohm's law

    VIR

    Practice


    B-005-04-01
    If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor?
    48 volts
    52 volts
    100 volts
    25 volts

    B-005-04-02
    How is the current in a DC circuit calculated when the voltage and resistance are known?
    Current equals voltage divided by resistance
    Current equals resistance multiplied by voltage
    Current equals resistance divided by voltage
    Current equals power divided by voltage

    B-005-04-03
    How is the resistance in a DC circuit calculated when the voltage and current are known?
    Resistance equals current multiplied by voltage
    Resistance equals voltage divided by current
    Resistance equals power divided by voltage
    Resistance equals current divided by voltage

    B-005-04-04
    How is the voltage in a DC circuit calculated when the current and resistance are known?
    Voltage equals current divided by resistance
    Voltage equals resistance divided by current
    Voltage equals power divided by current
    Voltage equals current multiplied by resistance

    B-005-04-05
    If a 12-volt battery supplies 0.25 ampere to a circuit, what is the circuit's resistance?
    3 ohms
    48 ohms
    12 ohms
    0.25 ohm

    B-005-04-06
    Calculate the value of resistance necessary to drop 100 volts with current flow of .8 milliamperes:
    125 kilohms
    125 ohms
    1250 ohms
    1.25 kilohms

    B-005-04-07
    The voltage required to force a current of 4.4 amperes through a resistance of 50 ohms is:
    220 volts
    2220 volts
    22.0 volts
    0.220 volt

    B-005-04-08
    A lamp has a resistance of 30 ohms and a 6 volt battery is connected. The current flow will be:
    2 amperes
    0.5 ampere
    0.005 ampere
    0.2 ampere

    B-005-04-09
    What voltage would be needed to supply a current of 200 mA, to operate an electric lamp which has a resistance of 25 ohms?
    5 volts
    8 volts
    175 volts
    225 volts

    B-005-04-10
    The resistance of a circuit can be found by using one of the following:
    R = E/I
    R = I/E
    R = E/R
    R = E X I

    B-005-04-11
    If a 3 volt battery supplies 300 mA to a circuit, the circuit resistance is:
    10 ohms
    9 ohms
    5 ohms
    3 ohms