FCC Novice Exam Question Pool. Subelement 2D. Amateur Radio Practice. 4 Questions. One (1) question must be from the following: ------------------------------------------------ 2D 1.1 B How can an Amateur Station be protected against being operated by unauthorized persons? A. Install a carrier operated relay in the main power line. B. Install a key operated ON/OFF switch in the main power line. C. Post a "Danger - High Voltage" sign in the station. D. Install AC line fuses in the main power line. 2D 2.1 D Why should all antenna and rotor cables be grounded when an Amateur Station is not in use? A. To lock the antenna system in one position. B. To avoid radio frequency interference. C. To save electricity. D. To protect the station and building from damage due to a nearby lightning strike. 2D 2.2 C How can an antenna system be protected from damage due to a nearby lightning strike? A. Install a balun at the antenna feed point. B. Install an RF choke in the feed line. C. Ground all antennas when not in use. D. Install a line fuse in the antenna wire. 2D 2.3 D How can Amateur Station equipment be protected from damage due to lightning striking the electrical wiring of the building? A. Use heavy insulation on the wiring. B. Keep th equipment ON constantly. C. Disconnect the ground system. D. Disconnect all equipment after use, either by unplugging or by using a main disconnect switch. 2D 3.1 B For proper protection from lightning strikes, what pieces of equipment should be grounded in an Amateur Station? A. The power supply primary. B. All station equipment. C. The feed line center conductors. D. The AC power mains. 2D 3.2 A What is a convenient indoor grounding point for an Amateur Station? A. A metallic cold water pipe. B. PVC plumbing. C. A window screen. D. A natural gas pipe. 2D 3.3 C To protect against electrical shock hazards, to what should the chassis of each piece of equipment in an Amateur Station be connected? A. Insulated shock mounts. B. The antenna. C. A good ground connection. D. A circuit breaker. 2D 4.1 D When climbing an antenna tower, what type of safety equipment should be worn? A. Grounding chain. B. A reflective vest. C. Long pants. D. A saftey belt. 2D 4.2 A For safety purposes, how high should all portions of a horizontal wire antenna be located? A. High enough so that a person can not touch them from the ground. B. Higher than chest level. C. Above knee level. D. Above electrical lines. 2D 4.3 D While assisting another person working on an antenna tower, what type of safety equipment should a person on the ground wear? A. A reflective vest. B. A safety belt. C. A grounding chain. D. A hard hat. One (1) question must be from the following: ------------------------------------------------ 2D 5.1 B What is a likely indication that radio frequency interference to a receiver is caused by Front-End Overload? A. A low pass filter at the transmitter reduces interference sharply. B. The interference is independent of frequency. C. A high pass filter at the receiver reduces interference little or not at all. D. Grounding the receiver makes the problem worse. 2D 5.2 C What is likely the problem when radio frequency interference occurs to a receiver regardless of frequency, while an Amateur Station is transmitting? A. Inadequate transmitter harmonic suppression. B. Receiver VR tube discharge. C. Receiver overload. D. Incorrect antenna length. 2D 5.3 B What type of filter should be installed on a TV receiver as the first step in preventing Overload from an Amateur Radio Station Transmission? A. Low Pass. B. High Pass. C. Band Pass. D. Notch. 2D 5.4 C What is meant by RECEIVER OVERLOAD? A. Interference caused by transmitter harmonics. B. Interference caused by overcrowded band conditions. C. Interference caused by strong signals from a nearby transmitter. D. Interference caused by turning the receiver volume too high. 2D 6.1 A What is meant by HARMONIC RADIATION? A. Transmission of signals at whole number multiples of the fundamental (desired) frequency. B. Transmission of signals that include a Superimposed 60 Hz. Hum. C. Transmission of signals caused by sympathetic vibrations from a nearby transmitter. D. Transmission of signals to produce a stimulated emission in the air to enhance skip propagation. 2D 6.2 A Why is harmonic radiation by an Amateur Station undesirable? A. It will cause interference to other stations and may result in Out-Of-Band radiation. B. It uses large amounts of electric power. C. It will cause sympathetic vibrations in nearby transmitters. D. It will produce stimulated emission in the air above the transmitter, thus causing Aurora. 2D 6.3 A What type of interference may radiate from a multiband antenna connected to an improperly tuned transmitter? A. Harmonic radiation. B. Auroral distortion. C. Parasitic radiation. D. Intermodulation. 2D 6.4 C What is the purpose of shielding in a transmitter? A. It give the Low Pass filter structural stability. B. It enhances the microphonic tendencies of radiotelephone transmitters. C. It prevents unwanted RF radiation. D. It helps maintain a sufficiently high operating temperature in circuit components. 2D 6.5 D What is the likely problem when interference is observed on only one or two channels of a TV receiver while an Amateur Station is transmitting? A. Excessive Low Pass filtering. B. Sporadic E Deionization. C. Receiver Front End Overload. D. Harmonic Radiation. 2D 6.6 B What type of filter should be installed on an Amateur Transmitter as the first step in reducing harmonic radiation? A. Key Click filter. B. Low Pass filter. C. High Pass filter. D. CW filter. One (1) question must be from the following: ------------------------------------------------ 2D 7.1 B Why should the impedance of a transmitter final amplifier curcuit match the impedance of the antenna or feed line? A. To prevent sympathetic vibrations in nearby radio equipment. B. To obtain maximum power transfer to the antenna. C. To help maintain sufficiently high operating temperature in circuit components. D. To create the maximum number of standing waves on the feed line. 2D 7.2 C What is the term for the measurement of the impedance match between a transmitter final amplifier circuit and the antenna or feed line? A. Voltage Flyback ratio. B. Impedance Sine ratio. C. Standing Wave ratio. D. Current Overfeed ratio. 2D 7.3 A What accessory is used to measure RF power being reflected back down the feed line from the transmitter to the antenna? A. SWR Meter. B. RF Tuner C. S Meter. D. Field Strength Meter 2D 7.4 C What accessory is often used to measure voltage standing wave ratio? A. Ohmmeter. B. Ammeter. C. SWR Bridge. D. Current Bridge. 2D 7.5 D Where should a Standing Wave Ratio Bridge be connected to indicate the impedance match of a transmiter and an antenna? A. Between the antenna and matchbox. B. Between the key and transmitter. C. Between the mike and transmitter. D. Between the transmitter and matchbox. 2D 7.6 B Coaxial Feed Line should be operated with what kind of Standing Wave Ratio? A. As high as possible. B. As low as possible. C. Standing Wave Ratio is not important. D. Standing Wave Ratio cannot be measured in a Coaxial Cable. 2D 7.7 D If the Standing Wave Ratio Bridge reading is higher at 3700 kHz. than at 3750 kHz., what does this indicate about the antenna? A. Too long for optimal operation at 3700 kHz. B. Broadbanded. C. Good only for 37 meter operation. D. Too short for optimal operation at 3700 kHz. 2D 7.8 A If the Standing Wave Ratio Bridge reading is lower at 3700 kHz. than at 3750 kHz., what does this indicate about the antenna? A. Too long for optimal operation at 3700 kHz. B. Broadbanded. C. Good only for 37 meter operation. D. Too short for optimal operation at 3700 kHz. 2D 8.1 A What kind of Standing Wave Ratio Bridge reading may indicate poor electrical contact between parts of an antenna system? A. An erratic reading. B. An unusually low reading. C. No reading at all. D. A negative reading. 2D 8.2 A High Standing Wave Ratio Bridge reaings measured from a Half-Wave Dipole antenna being feed by Coaxial Cable can be lowered by doing what to the antenna? A. Change the electrical length of the antenna. B. Reduce the diameter of the antenna's radiating element. C. Connect a short jumper wire across the antenna's center insulator. D. Use a feed line having less loss per foot. One (1) question must be from the following: ------------------------------------------------ 2D 9.1 B What precautions should you take when working with a 1270 MHz. Waveguide? A. Make sure that the RF Leakage Filters are installed at both ends of the waveguide. B. Never look into the open end of the waveguide when RF is applied. C. Minimize the Standing Wave Ratio before you test the waveguide. D. Never have both ends of the waveguide open at once when RF is applied. 2D 9.2 A What precautions should you take when you mount a VHF or UHF antenna in a permanent location? A. Make sure that no one can be near the antenna when you are transmitting. B. Make sure the RF shield screens are in place. C. Make sure the antenna is near the ground to maximize the directional effects. D. Make sure you install an RF Leakage Filter at the antenna feed point. 2D 9.3 C What precautions should you take before removing the shielding on a VHF or UHF Power Amplifier? A. Make sure all RF screens are in place at the antenna. B. Make sure the feedline is properly grounded. C. Make sure the amplifier cannot be accidentally energized. D. Make sure that the RF Leakage Filters are connected. 2D 9.4 A Why should you use only good quality, well constructed Coaxial Cable and connectors for a VHF or UHF antenna system? A. To minimize RF Leakage. B. To reduce Parasitic Oscillations. C. To maximize the directional characteristics of your antenna. D. To maximize the Standing Wave Ratio of the antenna system. 2D 9.5 B Why should you be careful to position the antenna of your 220 MHz. Hand Held Transciever away from your head when you are transmitting? A. To take advantage of the directional effect. B. To minimize RF exposure. C. To use your body to reflect the signal, improving the directional characteristics of the antenna. D. To minimize static discharges. 2D 9.6 D How can you minimize RF Exposure when you are operating your 220 MHz. Hand Held Transciever. A. Position the antenna near the ground. B. Use a shielded RF screen around your antenna. C. Use a special short STUBBY DUCK antenna. D. Position the antenna away from your head. 2D 9.7 D Why should you be careful to position the antenna of your 1270 MHz. Hand Held Transciever away from your head when you are transmitting? A. To take advantage of the directional effect. B. To use your body to reflect the signal, improving the directional characteristics of the antenna. C. To minimize static discharges. D. To minimize RF exposure. 2D 9.8 D How can you minimize RF Exposure when you are operating your 1270 MHz. Hand Held Transciever. A. Position the antenna near the ground. B. Use a shielded RF screen around your antenna. C. Use a special short STUBBY DUCK antenna. D. Position the antenna away from your head. 2D 9.9 B How can you minimize RF Leakage from your VHF or UHF antenna system? A. Use open wire line for the antenna feed line. B. Use only good quality, well constructed Coaxial Cable and connectors. C. Use special shielded AC line cords with all your equipment. D. Use an RF Leakage Filter on the antenna feed line. 2D 9.10 B Why should you make sure your VHF or UHF amplifier cannot be energized before you open the amplifier enclosure. A. To minimize static discharge when you open the enclosure. B. To minimize RF Exposure and prevent electrical shock. C. To minimize the effectd of hand capacitance. D. To prevent prevent exposure to Cerenkov Radiation from the amplifier. 2D 9.11 B Why should you never look into a VHF or UHF waveguide when RF is applied? A. Because the fluorescent coating inside the waveguide gets very bright. B. Because exposure to VHF or UHF RF Energy can be harmful to your eyes. C. Because the waveguide might not be properly grounded. D. Because the Cerenkov Effect may scatter RF energy. 2D 9.12 B Why should you be sure that your transmitter cannot be energized before you work on your VHF or UHF antennas? A. Because operating the transmitter when the antennas are disconnected might harm the transmitter. B. Because exposure to VHF or UHF RF Energy can be harmful. C. Because if the transmitter is operated while you are touching the antenna, the radiated energy might be out of the Amateur Band. D. Because accidental operation might blow a fuse. ------------------------------------------------ End of Subelement 2D.