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
  • 5.5 Series and Parallel Resistors

    Practice


    B-005-05-01
    In a parallel circuit with a voltage source and several branch resistors, how is the total current related to the current in the branch resistors?
    It equals the sum of the branch current through each resistor
    It equals the average of the branch current through each resistor
    It decreases as more parallel resistors are added to the circuit
    It is the sum of each resistor's voltage drop multiplied by the total number ofresistors

    B-005-05-02
    A 6 volt battery is connected across three resistances of connected in parallel.
    The current through the 10 ohms, 15 ohms and 20 ohms separate resistances, when added together, equals the total current drawn from the battery
    The current flowing through the 10 ohm resistance is less than that flowing through the 20 ohm resistance
    The voltage drop across each resistance added together equals 6 volts
    The voltage drop across the 20 ohm resistance is greater than the voltage across the 10 ohm resistance

    B-005-05-03
    Total resistance in a parallel circuit:
    is always less than the smallest resistance
    depends upon the IR drop across each branch
    could be equal to the resistance of one branch
    depends upon the applied voltage

    B-005-05-04
    Two resistors are connected in paralle and are connected across a 40 volt battery. If each resistor is 1000 ohms, the total current is:
    80 milliamperes
    40 milliamperes
    80 amperes
    40 amperes

    B-005-05-05
    The total resistance of resistors connected in series is:
    greater than the resistance of any one resistor
    less than the resistance of any one resistor
    equal to the highest resistance present
    equal to the lowest resistance present

    B-005-05-06
    Five 10 ohm resistors connected in series equals:
    50 ohms
    5 ohms
    10 ohms
    1 ohm

    B-005-05-07
    Which series combination of resistors would replace a single 120 ohm resistor?
    six 22 ohm
    two 62 ohm
    five 100 ohm
    five 24 ohm

    B-005-05-08
    If ten resistors of equal value were wired in parallel, the total resistance would be:
    10 / R
    R / 10
    10 x R
    10 + R

    B-005-05-09
    The total resistance of four 68 ohm resistors wired in parallel is:
    12 ohms
    34 ohms
    272 ohms
    17 ohms

    B-005-05-10
    Two resistors are in parallel. Resistor A carries twice the current of resistor B, which means that:
    the voltage across B is twice that across A
    the voltage across A is twice that across B
    A has half the resistance of B
    B has half the resistance of A

    B-005-05-11
    The total current in a parallel circuit is equal to the:
    source voltage divided by the value of one of the resistive elements
    sum of the currents through all the parallel branches
    source voltage divided by the sum of the resistive elements
    current in any one of the parallel branches