Zu Test For South African Amateur Radio Licence

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| By Ggmeyer
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Quizzes Created: 1 | Total Attempts: 128
Questions: 16 | Attempts: 128

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Zu Test For South African Amateur Radio Licence - Quiz


Preperation ZU test for South African Amateur Radio Licence


Questions and Answers
  • 1. 

    The unit of measure for Inductance is?

    • A.

      Ohms

    • B.

      Meters

    • C.

      Volts

    • D.

      Henry

    Correct Answer
    D. Henry
    Explanation
    The unit of measure for inductance is Henry. Inductance is a property of an electrical circuit that opposes any change in current flow. It is represented by the symbol "H" and is named after Joseph Henry, an American scientist who made significant contributions to the field of electromagnetism. Ohms, meters, and volts are units of measure for resistance, length, and voltage, respectively, and are not applicable to inductance.

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  • 2. 

    Within what time period do you have to inform ICASA if you move to a new residence ?

    • A.

      15 days

    • B.

      30 days

    • C.

      14 days

    • D.

      22 days

    Correct Answer
    C. 14 days
    Explanation
    When moving to a new residence, it is necessary to inform ICASA within 14 days. This timeframe allows ICASA to update their records and ensure that the individual's communication services, such as phone lines or internet connections, can be transferred smoothly to the new address. Failing to inform ICASA within this period may lead to disruptions in service or delays in receiving important communications.

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  • 3. 

    The Q code QTH refers to ?

    • A.

      Location

    • B.

      Your signal strength

    • C.

      Your transmitted power

    • D.

      The quality of your signal

    Correct Answer
    A. Location
    Explanation
    The Q code QTH is used in amateur radio to inquire about the location of the station being contacted. It is a standard code that allows operators to quickly and efficiently exchange information during radio communication. Therefore, the correct answer is "Location."

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  • 4. 

    The word SOUTH in pHONETIC ALpHABET is?

    • A.

      Salt Old Uniform Too Hello

    • B.

      Sierra Oscor Uniform Tango Hotel

    • C.

      See Our United Take Hold

    • D.

      Sea Our Umbrella Taken Home

    Correct Answer
    B. Sierra Oscor Uniform Tango Hotel
    Explanation
    The correct answer is Sierra Oscor Uniform Tango Hotel. In the NATO phonetic alphabet, each letter is represented by a specific word to avoid confusion and miscommunication. The word "SOUTH" is spelled out using the phonetic words Sierra, Oscor, Uniform, Tango, and Hotel.

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  • 5. 

    A capacitor and inductor connected in parallel, form?

    • A.

      A circuit

    • B.

      A resonant circuit

    • C.

      A long wire

    • D.

      A battery

    Correct Answer
    B. A resonant circuit
    Explanation
    When a capacitor and an inductor are connected in parallel, they form a resonant circuit. A resonant circuit is a circuit that can store and release energy at a specific frequency. It consists of an inductor, which stores energy in its magnetic field, and a capacitor, which stores energy in its electric field. The combination of these two components allows the circuit to resonate at a specific frequency, resulting in a highly efficient transfer of energy between the capacitor and the inductor. This resonant behavior is commonly used in applications such as radio tuning circuits and power factor correction.

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  • 6. 

    What power are ZU licence holders permitted to transmit?

    • A.

      1 dBw

    • B.

      20 Watts

    • C.

      100 Watts

    • D.

      2 Watts

    Correct Answer
    B. 20 Watts
    Explanation
    ZU licence holders are permitted to transmit with a power of 20 Watts. This means that they can transmit signals with a maximum power output of 20 Watts.

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  • 7. 

    When normal communications systems are not available, what bands may an amateur station use to provide essential communications when there is an immediate threat to the safety of human life or the protection of property?

    • A.

      Use the cell phone

    • B.

      Any band

    • C.

      Only use the bands that the station is licensed for.

    • D.

      Only use morse code

    Correct Answer
    B. Any band
    Explanation
    In emergency situations where regular communication systems are down, an amateur station may use any band to provide essential communications for the safety of human life or property protection. This allows for flexibility and the ability to utilize any available frequency to establish vital communication links during emergencies when immediate action is required.

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  • 8. 

    To measure the voltage present at a component in a circuit the voltmeter must be placed...

    • A.

      In series with the component to be tested

    • B.

      In parallel with component the circuit

    • C.

      On the table next to the circuit

    • D.

      In parallel with the power supply

    Correct Answer
    B. In parallel with component the circuit
    Explanation
    The voltmeter must be placed in parallel with the component in the circuit in order to measure the voltage. Placing it in parallel allows the voltmeter to measure the potential difference across the component. If it were placed in series with the component, it would disrupt the flow of current and give an inaccurate reading.

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  • 9. 

    Capacitance is measured in

    • A.

      Ohms

    • B.

      Volts

    • C.

      Farad

    • D.

      Henry

    Correct Answer
    C. Farad
    Explanation
    Capacitance is a measure of an object's ability to store electrical charge. It is the ratio of the amount of charge stored on an object to the potential difference (voltage) across the object. The unit of capacitance is the farad, which is equal to one coulomb per volt. Therefore, the correct answer is Farad.

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  • 10. 

    If the VSWR of an antenna is measured and found to be 1:3 at the frquency you wish to transmit at , what needs to be done in order to match the antenna better?

    • A.

      Stop transmitting

    • B.

      Work on the antenna

    • C.

      Increase the power

    • D.

      Decreas the voltage

    Correct Answer
    B. Work on the antenna
    Explanation
    To match the antenna better, working on the antenna is necessary. The VSWR (Voltage Standing Wave Ratio) of 1:3 indicates that there is a mismatch between the antenna and the transmission line. This can lead to poor signal transmission and potential damage to the transmitter. By working on the antenna, adjustments can be made to improve its impedance match with the transmission line, resulting in better signal transmission efficiency.

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  • 11. 

    Which wire in a 3-conductor power cord should be attached to the earth in a device operated from a 220-VAC single-phase source?

    • A.

      Blue wire

    • B.

      Green/ Yellow wire

    • C.

      Brown wire

    • D.

      White wire

    Correct Answer
    B. Green/ Yellow wire
    Explanation
    The green/yellow wire in a 3-conductor power cord should be attached to the earth in a device operated from a 220-VAC single-phase source. This wire is commonly known as the ground wire and is responsible for providing a safe path for electrical current to flow in case of a fault or short circuit. By connecting the device's metal casing to the ground wire, any excess electrical current will be safely directed to the ground, preventing the risk of electric shock to the user.

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  • 12. 

    What must you transmit to identify your amateur station?

    • A.

      Your full name

    • B.

      Your first name and location?

    • C.

      Your call sign

    • D.

      Your ID number

    Correct Answer
    C. Your call sign
    Explanation
    To identify your amateur station, you must transmit your call sign. A call sign is a unique combination of letters and numbers assigned to each amateur radio operator. It serves as a form of identification and is used to differentiate between different stations during communication. Transmitting your call sign allows other operators to identify you and establish contact.

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  • 13. 

    Which of the following should you do when selecting a frequency on which to transmit?

    • A.

      Call CQ to see if anyone is listening.

    • B.

      Listen to determine if the frequency is busy.

    • C.

      Check for maximum power output.

    • D.

      Talk loudly until other transmissions stop

    Correct Answer
    B. Listen to determine if the frequency is busy.
    Explanation
    When selecting a frequency to transmit on, it is important to listen first to determine if the frequency is already being used by someone else. This is done to avoid interference and ensure efficient communication. By listening, you can ensure that the frequency is not busy and choose a clear channel to transmit on.

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  • 14. 

    What formula is used to calculate current in a circuit?

    • A.

      Current (I) equals voltage (V) multiplied by resistance (R).

    • B.

      Current (I) equals voltage (V) divided by resistance (R).

    • C.

      Current (I) equals voltage (V) added to resistance (R).

    • D.

      Current (I) equals voltage (V) minus resistance (R).

    Correct Answer
    B. Current (I) equals voltage (V) divided by resistance (R).
    Explanation
    The formula used to calculate current in a circuit is I = V/R, where I represents current, V represents voltage, and R represents resistance. This formula states that current is equal to voltage divided by resistance.

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  • 15. 

    What frequencies can be used on the 2 Meter band

    • A.

      From 144 Mhz to 146Mhz

    • B.

      From 144.5Mhz to 145.5 Mhz

    • C.

      From 3.5Mhz to 3.8Mhz

    • D.

      From 28.8Mhz to 29.9Mhz

    Correct Answer
    A. From 144 Mhz to 146Mhz
    Explanation
    The correct answer is "From 144 Mhz to 146Mhz." This is because the 2 Meter band is allocated for amateur radio use in the frequency range of 144 MHz to 148 MHz. Therefore, any frequencies within this range can be used on the 2 Meter band.

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  • 16. 

    What is the resistance of a circuit when a current of 3 amperes flows through a resistor connected to 90 volts?

    • A.

      3 ohms

    • B.

      30 ohms

    • C.

      25 ohms

    • D.

      90 ohms

    Correct Answer
    B. 30 ohms
    Explanation
    The resistance of a circuit can be calculated using Ohm's Law, which states that resistance is equal to voltage divided by current. In this case, the voltage is given as 90 volts and the current is given as 3 amperes. By dividing 90 volts by 3 amperes, we get a resistance of 30 ohms.

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  • Current Version
  • Apr 24, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 28, 2009
    Quiz Created by
    Ggmeyer
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