Zu Test For South African Amateur Radio Licence

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.

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.

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.

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.

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.

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."

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.