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- 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.
-