QRZ! Ham Radio 1

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Received: from port6.hartford.pub-ip.psi.net by uu2.psi.com (5.65b/4.0.071791-PSI/PSINet) via SMTP; id AA18541 for senk@hpb.cis.pitt.edu; Wed, 14 Jul 93 11:02:14 -0400 Received: from efh by mgate with SMTP id AA218924 ; Wed, 14 Jul 93 08:34:35 EST Date: Wed, 14 Jul 93 09:21:57 GMT Message-Id: <97166@efh> From: info-serv@arrl.org (ARRL HQ INFORMATION MAIL SERVER) Reply-To: info-serv@arrl.org To: senk@hpb.cis.pitt.edu Subject: INFO response: POOL-NOV-2-NEW *************************************************************************** *** Note: A graphics sheet must be used with this question pool. *** *** It can be obtained from the ARRL/VEC (225 Main St, *** *** Newington CT 06111) for an SASE. *** *************************************************************************** Continued from file NOVICE-1.NEW... SUBELEMENT N4 - AMATEUR RADIO PRACTICES [4 exam questions - 4 groups] N4A Unauthorized use prevention, lightning protection, and station grounding. N4A01 (B) How could you best keep unauthorized persons from using your amateur station at home? A. Use a carrier-operated relay in the main power line B. Use a key-operated on/off switch in the main power line C. Put a "Danger - High Voltage" sign in the station D. Put fuses in the main power line N4A02 (A) How could you best keep unauthorized persons from using a mobile amateur station in your car? A. Disconnect the microphone when you are not using it B. Put a "do not touch" sign on the radio C. Turn the radio off when you are not using it D. Tune the radio to an unused frequency when you are done using it N4A03 (A) Why would you use a key-operated on/off switch in the main power line of your station? A. To keep unauthorized persons from using your station B. For safety, in case the main fuses fail C. To keep the power company from turning off your electricity during an emergency D. For safety, to turn off the station in the event of an emergency N4A04 (D) Why should you ground all antenna and rotator cables when your 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 lightning damage N4A05 (C) How can an antenna system best be protected from lightning damage? A. Install a balun at the antenna feed point B. Install an RF choke in the antenna feed line C. Ground all antennas when they are not in use D. Install a fuse in the antenna feed line N4A06 (D) How can amateur station equipment best be protected from lightning damage? A. Use heavy insulation on the wiring B. Never turn off the equipment C. Disconnect the ground system from all radios D. Disconnect all equipment from the power lines and antenna cables N4A07 (B) For best protection from electrical shock, what should be grounded in an amateur station? A. The power supply primary B. All station equipment C. The antenna feed line D. The AC power mains N4A08 (A) What is usually a good indoor grounding point for an amateur station? A. A metallic cold water pipe B. A plastic cold water pipe C. A window screen D. A metallic natural gas pipe N4A09 (C) Where should you connect the chassis of each piece of your station equipment to best protect against electrical shock? A. To insulated shock mounts B. To the antenna C. To a good ground connection D. To a circuit breaker N4A10 (B) Which of these materials is best for a ground rod driven into the earth? A. Hard plastic B. Copper or copper-clad steel C. Iron or steel D. Fiberglass N4A11 (C) If you ground your station equipment to a ground rod driven into the earth, what is the shortest length the rod should be? A. 4 feet B. 6 feet C. 8 feet D. 10 feet N4B Radio frequency safety precautions, safety interlocks, antenna installation safety procedures. N4B01 (B) What should you do for safety when operating at 1270 MHz? A. Make sure that an RF leakage filter is installed at the antenna feed point B. Keep antenna away from your eyes when RF is applied C. Make sure the standing wave ratio is low before you conduct a test D. Never use a shielded horizontally polarized antenna N4B02 (A) What should you do for safety if you put up a UHF transmitting antenna? A. Make sure the antenna will be in a place where no one can get near it when you are transmitting B. Make sure that RF field screens are in place C. Make sure the antenna is near the ground to keep its RF energy pointing in the correct direction D. Make sure you connect an RF leakage filter at the antenna feed point N4B03 (C) What should you do for safety before removing the shielding on a UHF power amplifier? A. Make sure all RF screens are in place at the antenna feed line B. Make sure the antenna feed line is properly grounded C. Make sure the amplifier cannot accidentally be turned on D. Make sure that RF leakage filters are connected N4B04 (A) Why should you use only good quality coaxial cable and connectors for a UHF antenna system? A. To keep RF loss low B. To keep television interference high C. To keep the power going to your antenna system from getting too high D. To keep the standing wave ratio of your antenna system high N4B05 (B) Why should you make sure the antenna of a hand-held transceiver is not close to your head when transmitting? A. To help the antenna radiate energy equally in all directions B. To reduce your exposure to the radio-frequency energy C. To use your body to reflect the signal in one direction D. To keep static charges from building up N4B06 (D) Microwave oven radiation is similar to what type of amateur station RF radiation? A. Signals in the 3.5 MHz range B. Signals in the 21 MHz range C. Signals in the 50 MHz range D. Signals in the 1270 MHz range N4B07 (D) Why would there be a switch in a high-voltage power supply to turn off the power if its cabinet is opened? A. To keep dangerous RF radiation from leaking out through an open cabinet B. To keep dangerous RF radiation from coming in through an open cabinet C. To turn the power supply off when it is not being used D. To keep anyone opening the cabinet from getting shocked by dangerous high voltages N4B08 (D) What kind of safety equipment should you wear if you are working on an antenna tower? A. A grounding chain B. A reflective vest of approved color C. A flashing red, yellow or white light D. A carefully inspected safety belt, hard hat and safety glasses N4B09 (D) Why should you wear a safety belt if you are working on an antenna tower? A. To safely hold your tools so they don't fall and injure someone on the ground B. To keep the tower from becoming unbalanced while you are working C. To safely bring any tools you might use up and down the tower D. To prevent you from accidentally falling N4B10 (A) For safety, how high should you place a horizontal wire antenna? A. High enough so that no one can touch any part of it from the ground B. As close to the ground as possible C. Just high enough so you can easily reach it for adjustments or repairs D. Above high-voltage electrical lines N4B11 (C) Why should you wear a hard hat if you are on the ground helping someone work on an antenna tower? A. So you won't be hurt if the tower should accidentally fall B. To keep RF energy away from your head during antenna testing C. To protect your head from something dropped from the tower D. So someone passing by will know that work is being done on the tower and will stay away N4C SWR meaning and measurements. N4C01 (C) What instrument is used to measure standing wave ratio? A. An ohmmeter B. An ammeter C. An SWR meter D. A current bridge N4C02 (D) What instrument is used to measure the relative impedance match between an antenna and its feed line? A. An ammeter B. An ohmmeter C. A voltmeter D. An SWR meter N4C03 (A) Where would you connect an SWR meter to measure standing wave ratio? A. Between the feed line and the antenna B. Between the transmitter and the power supply C. Between the transmitter and the receiver D. Between the transmitter and the ground N4C04 (B) What does an SWR reading of 1:1 mean? A. An antenna for another frequency band is probably connected B. The best impedance match has been attained C. No power is going to the antenna D. The SWR meter is broken N4C05 (C) What does an SWR reading of less than 1.5:1 mean? A. An impedance match which is too low B. An impedance mismatch; something may be wrong with the antenna system C. A fairly good impedance match D. An antenna gain of 1.5 N4C06 (D) What does an SWR reading of 4:1 mean? A. An impedance match which is too low B. An impedance match which is good, but not the best C. An antenna gain of 4 D. An impedance mismatch; something may be wrong with the antenna system N4C07 (A) What kind of SWR reading may mean poor electrical contact between parts of an antenna system? A. A jumpy reading B. A very low reading C. No reading at all D. A negative reading N4C08 (A) What does a very high SWR reading mean? A. The antenna is the wrong length, or there may be an open or shorted connection somewhere in the feed line B. The signals coming from the antenna are unusually strong, which means very good radio conditions C. The transmitter is putting out more power than normal, showing that it is about to go bad D. There is a large amount of solar radiation, which means very poor radio conditions N4C09 (B) If an SWR reading at the low frequency end of an amateur band is 2.5:1, and is 5:1 at the high frequency end of the same band, what does this tell you about your 1/2-wavelength dipole antenna? A. The antenna is broadbanded B. The antenna is too long for operation on the band C. The antenna is too short for operation on the band D. The antenna is just right for operation on the band N4C10 (C) If an SWR reading at the low frequency end of an amateur band is 5:1, and 2.5:1 at the high frequency end of the same band, what does this tell you about your 1/2-wavelength dipole antenna? A. The antenna is broadbanded B. The antenna is too long for operation on the band C. The antenna is too short for operation on the band D. The antenna is just right for operation on the band N4C11 (A) If you use a 3-30 MHz RF-power meter at UHF frequencies, how accurate will its readings be? A. They may not be accurate at all B. They will be accurate enough to get by C. They will be accurate but the readings must be divided by two D. They will be accurate but the readings must be multiplied by two N4D RFI and its complications. N4D01 (C) What is meant by receiver overload? A. Too much voltage from the power supply B. Too much current from the power supply C. Interference caused by strong signals from a nearby transmitter D. Interference caused by turning the volume up too high N4D02 (B) What is one way to tell if radio-frequency interference to a receiver is caused by front-end overload? A. If connecting a low-pass filter to the transmitter greatly cuts down the interference B. If the interference is about the same no matter what frequency is used for the transmitter C. If connecting a low-pass filter to the receiver greatly cuts down the interference D. If grounding the receiver makes the problem worse N4D03 (C) If your neighbor reports television interference whenever you are transmitting from your amateur station, no matter what frequency band you use, what is probably the cause of the interference? A. Too little transmitter harmonic suppression B. Receiver VR tube discharge C. Receiver overload D. Incorrect antenna length N4D04 (D) If your neighbor reports television interference on one or two channels only when you are transmitting on the 15-meter band, what is probably the cause of the interference? A. Too much low-pass filtering on the transmitter B. De-ionization of the ionosphere near your neighbor's TV antenna C. TV receiver front-end overload D. Harmonic radiation from your transmitter N4D05 (B) What type of filter should be connected to a TV receiver as the first step in trying to prevent RF overload from an amateur HF station transmission? A. Low-pass B. High-pass C. Band pass D. Notch N4D06 (B) What type of filter might be connected to an amateur HF transmitter to cut down on harmonic radiation? A. A key-click filter B. A low-pass filter C. A high-pass filter D. A CW filter N4D07 (A) What is meant by harmonic radiation? A. Unwanted signals at frequencies which are multiples of the fundamental (chosen) frequency B. Unwanted signals that are combined with a 60-Hz hum C. Unwanted signals caused by sympathetic vibrations from a nearby transmitter D. Signals which cause skip propagation to occur N4D08 (A) Why is harmonic radiation from an amateur station not wanted? A. It may cause interference to other stations and may result in out-of-band signals B. It uses large amounts of electric power C. It may cause sympathetic vibrations in nearby transmitters D. It may cause auroras in the air N4D09 (A) What type of interference may come from a multi-band antenna connected to a poorly tuned transmitter? A. Harmonic radiation B. Auroral distortion C. Parasitic excitation D. Intermodulation N4D10 (C) What is the main purpose of shielding in a transmitter? A. It gives the low-pass filter a solid support B. It helps the sound quality of transmitters C. It prevents unwanted RF radiation D. It helps keep electronic parts warmer and more stable N4D11 (A) If you are told that your amateur station is causing television interference, what should you do? A. First make sure that your station is operating properly, and that it does not cause interference to your own television B. Immediately turn off your transmitter and contact the nearest FCC office for assistance C. Connect a high-pass filter to the transmitter output and a low-pass filter to the antenna-input terminals of the television D. Continue operating normally, because you have no reason to worry about the interference SUBELEMENT N5 - ELECTRICAL PRINCIPLES [4 exam questions - 4 groups] N5A Metric prefixes, ie pico, micro, milli, centi, kilo, mega, giga. N5A01 (B) If a dial marked in kilohertz shows a reading of 7125 kHz, what would it show if it were marked in megahertz? A. 0.007125 MHz B. 7.125 MHz C. 71.25 MHz D. 7,125,000 MHz N5A02 (C) If a dial marked in megahertz shows a reading of 3.525 MHz, what would it show if it were marked in kilohertz? A. 0.003525 kHz B. 35.25 kHz C. 3525 kHz D. 3,525,000 kHz N5A03 (D) If a dial marked in kilohertz shows a reading of 3725 kHz, what would it show if it were marked in hertz? A. 3,725 Hz B. 37.25 Hz C. 3,725 Hz D. 3,725,000 Hz N5A04 (B) How long is an antenna that is 400 centimeters long? A. 0.0004 meters B. 4 meters C. 40 meters D. 40,000 meters N5A05 (C) If an ammeter marked in amperes is used to measure a 3000- milliampere current, what reading would it show? A. 0.003 amperes B. 0.3 amperes C. 3 amperes D. 3,000,000 amperes N5A06 (B) If a voltmeter marked in volts is used to measure a 3500- millivolt potential, what reading would it show? A. 0.35 volts B. 3.5 volts C. 35 volts D. 350 volts N5A07 (B) How many farads is 500,000 microfarads? A. 0.0005 farads B. 0.5 farads C. 500 farads D. 500,000,000 farads N5A08 (B) How many microfarads is 1,000,000 picofarads? A. 0.001 microfarads B. 1 microfarad C. 1,000 microfarads D. 1,000,000,000 microfarads N5A09 (C) How many hertz are in a kilohertz? A. 10 B. 100 C. 1000 D. 1000000 N5A10 (C) How many kilohertz are in a megahertz? A. 10 B. 100 C. 1000 D. 1000000 N5A11 (B) If you have a hand-held transceiver which puts out 500 milliwatts, how many watts would this be? A. 0.02 B. 0.5 C. 5 D. 50 N5B Concepts of current, voltage, conductor, insulator, resistance, and the measurements thereof. N5B01 (D) What is the flow of electrons in an electric circuit called? A. Voltage B. Resistance C. Capacitance D. Current N5B02 (C) What is the basic unit of electric current? A. The volt B. The watt C. The ampere D. The ohm N5B03 (B) What is the pressure that forces electrons to flow through a circuit? A. Magnetomotive force, or inductance B. Electromotive force, or voltage C. Farad force, or capacitance D. Thermal force, or heat N5B04 (A) What is the basic unit of voltage? A. The volt B. The watt C. The ampere D. The ohm N5B05 (A) How much voltage does an automobile battery usually supply? A. About 12 volts B. About 30 volts C. About 120 volts D. About 240 volts N5B06 (C) How much voltage does a wall outlet usually supply (in the US)? A. About 12 volts B. About 30 volts C. About 120 volts D. About 480 volts N5B07 (C) What are three good electrical conductors? A. Copper, gold, mica B. Gold, silver, wood C. Gold, silver, aluminum D. Copper, aluminum, paper N5B08 (A) What are four good electrical insulators? A. Glass, air, plastic, porcelain B. Glass, wood, copper, porcelain C. Paper, glass, air, aluminum D. Plastic, rubber, wood, carbon N5B09 (B) What does an electrical insulator do? A. It lets electricity flow through it in one direction B. It does not let electricity flow through it C. It lets electricity flow through it when light shines on it D. It lets electricity flow through it N5B10 (D) What limits the amount of current that flows through a circuit if the voltage stays the same? A. Reliance B. Reactance C. Saturation D. Resistance N5B11 (D) What is the basic unit of resistance? A. The volt B. The watt C. The ampere D. The ohm N5C Ohm's Law (any calculations will be kept to a very low level - no fractions or decimals) and the concepts of energy and power, and open and short circuits. N5C01 (A) What formula shows how voltage, current and resistance relate to each other in an electric circuit? A. Ohm's Law B. Kirchhoff's Law C. Ampere's Law D. Tesla's Law N5C02 (C) If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor? A. 25 volts B. 52 volts C. 100 volts D. 200 volts N5C03 (B) If a 100-ohm resistor is connected to 200 volts, what is the current through the resistor? A. 1/2 ampere B. 2 amperes C. 300 amperes D. 20000 amperes N5C04 (A) If a current of 3 amperes flows through a resistor connected to 90 volts, what is the resistance? A. 30 ohms B. 93 ohms C. 270 ohms D. 1/30 ohm N5C05 (C) What is the word used to describe how fast electrical energy is used? A. Resistance B. Current C. Power D. Voltage N5C06 (C) If you have light bulbs marked 60 watts, 75 watts and 100 watts, which one will use electrical energy the fastest? A. The 60 watt bulb B. The 75 watt bulb C. The 100 watt bulb D. They will all be the same N5C07 (B) What is the basic unit of electrical power? A. The ohm B. The watt C. The volt D. The ampere N5C08 (C) Which electrical circuit can have no current? A. A closed circuit B. A short circuit C. An open circuit D. A complete circuit N5C09 (D) Which electrical circuit uses too much current? A. An open circuit B. A dead circuit C. A closed circuit D. A short circuit N5C10 (B) What is the name of a current that flows only in one direction? A. An alternating current B. A direct current C. A normal current D. A smooth current N5C11 (A) What is the name of a current that flows back and forth, first in one direction, then in the opposite direction? A. An alternating current B. A direct current C. A rough current D. A reversing current N5D Concepts of frequency, including AC vs DC, frequency units, AF vs RF and wavelength. N5D01 (D) What term means the number of times per second that an alternating current flows back and forth? A. Pulse rate B. Speed C. Wavelength D. Frequency N5D02 (A) What is the basic unit of frequency? A. The hertz B. The watt C. The ampere D. The ohm N5D03 (B) What frequency can humans hear? A. 0 - 20 Hz B. 20 - 20,000 Hz C. 200 - 200,000 Hz D. 10,000 - 30,000 Hz N5D04 (B) Why do we call signals in the range 20 Hz to 20,000 Hz audio frequencies? A. Because the human ear cannot sense anything in this range B. Because the human ear can sense sounds in this range C. Because this range is too low for radio energy D. Because the human ear can sense radio waves in this range N5D05 (C) What is the lowest frequency of electrical energy that is usually known as a radio frequency? A. 20 Hz B. 2,000 Hz C. 20,000 Hz D. 1,000,000 Hz N5D06 (B) Electrical energy at a frequency of 7125 kHz is in what frequency range? A. Audio B. Radio C. Hyper D. Super-high N5D07 (C) If a radio wave makes 3,725,000 cycles in one second, what does this mean? A. The radio wave's voltage is 3,725 kilovolts B. The radio wave's wavelength is 3,725 kilometers C. The radio wave's frequency is 3,725 kilohertz D. The radio wave's speed is 3,725 kilometers per second N5D08 (C) What is the name for the distance an AC signal travels during one complete cycle? A. Wave speed B. Waveform C. Wavelength D. Wave spread N5D09 (A) What happens to a signal's wavelength as its frequency increases? A. It gets shorter B. It gets longer C. It stays the same D. It disappears N5D10 (A) What happens to a signal's frequency as its wavelength gets longer? A. It goes down B. It goes up C. It stays the same D. It disappears N5D11 (B) What does 60 hertz (Hz) mean? A. 6000 cycles per second B. 60 cycles per second C. 6000 meters per second D. 60 meters per second SUBELEMENT N6 - CIRCUIT COMPONENTS [2 exam questions - 2 groups] N6A Electrical function and/or schematic representation of resistor, switch, fuse, or battery. N6A01 (B) What can a single-pole, double-throw switch do? A. It can switch one input to one output B. It can switch one input to either of two outputs C. It can switch two inputs at the same time, one input to either of two outputs, and the other input to either of two outputs D. It can switch two inputs at the same time, one input to one output, and the other input to another output N6A02 (D) What can a double-pole, single-throw switch do? A. It can switch one input to one output B. It can switch one input to either of two outputs C. It can switch two inputs at the same time, one input to either of two outputs, and the other input to either of two outputs D. It can switch two inputs at the same time, one input to one output, and the other input to the other output N6A03 (A) Which component has a positive and a negative side? A. A battery B. A potentiometer C. A fuse D. A resistor N6A04 (B) Which component has a value that can be changed? A. A single-cell battery B. A potentiometer C. A fuse D. A resistor N6A05 (B) In Figure N6-1 which symbol represents a variable resistor or potentiometer? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6A06 (C) In Figure N6-1 which symbol represents a fixed resistor? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6A07 (A) In Figure N6-1 which symbol represents a fuse? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6A08 (D) In Figure N6-1 which symbol represents a single-cell battery? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6A09 (A) In Figure N6-2 which symbol represents a single-pole, single- throw switch? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6A10 (D) In Figure N6-2 which symbol represents a single-pole, double- throw switch? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6A11 (C) In Figure N6-2 which symbol represents a double-pole, single- throw switch? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6A12 (B) In Figure N6-2 which symbol represents a double-pole, double- throw switch? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6B Electrical function and/or schematic representation of a ground, antenna, transistor, or a triode vacuum tube. N6B01 (A) Which component can amplify a small signal using low voltages? A. A PNP transistor B. A variable resistor C. An electrolytic capacitor D. A multiple-cell battery N6B02 (B) Which component conducts electricity from a negative emitter to a positive collector when its base voltage is made positive? A. A variable resistor B. An NPN transistor C. A triode vacuum tube D. A multiple-cell battery N6B03 (A) Which component is used to radiate radio energy? A. An antenna B. An earth ground C. A chassis ground D. A potentiometer N6B04 (D) In Figure N6-3 which symbol represents an earth ground? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6B05 (A) In Figure N6-3 which symbol represents a chassis ground? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6B06 (C) In Figure N6-3 which symbol represents an antenna? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6B07 (D) In Figure N6-4 which symbol represents an NPN transistor? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6B08 (A) In Figure N6-4 which symbol represents a PNP transistor? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6B09 (B) In Figure N6-4 which symbol represents a triode vacuum tube? A. Symbol 1 B. Symbol 2 C. Symbol 3 D. Symbol 4 N6B10 (A) What is one reason a triode vacuum tube might be used instead of a transistor in a circuit? A. It handles higher power B. It uses lower voltages C. It uses less current D. It is much smaller N6B11 (C) Which component can amplify a small signal but must use high voltages? A. A transistor B. An electrolytic capacitor C. A vacuum tube D. A multiple-cell battery SUBELEMENT N7 - PRACTICAL CIRCUITS [2 exam questions - 2 groups] N7A Functional layout of transmitter, transceiver, receiver, power supply, antenna, antenna switch, antenna feed line, impedance-matching device, SWR meter. N7A01 (B) What would you connect to your transceiver if you wanted to switch it between more than one type of antenna? A. A terminal-node switch B. An antenna switch C. A telegraph key switch D. A high-pass filter N7A02 (C) What device might allow use of an antenna on a band it was not designed for? A. An SWR meter B. A low-pass filter C. An antenna tuner D. A high-pass filter N7A03 (D) What connects your transceiver to your antenna? A. A dummy load B. A ground wire C. The power cord D. A feed line N7A04 (B) What might you connect between your transceiver and an antenna switch connected to several types of antennas? A. A high-pass filter B. An SWR meter C. A key-click filter D. A mixer N7A05 (D) If your SWR meter is connected to an antenna tuner on one side, what would you connect to the other side of it? A. A power supply B. An antenna C. An antenna switch D. A transceiver N7A06 (D) Which of these should never be connected to the output of a transceiver? A. An antenna switch B. An SWR meter C. An antenna D. A receiver N7A07 (A) If your mobile transceiver works in your car but not in your home, what should you check first? A. The power supply B. The speaker C. The microphone D. The SWR meter N7A08 (A) What does an antenna tuner do? A. It matches a transceiver to a mismatched antenna system B. It helps a receiver automatically tune in stations that are far away C. It switches an antenna system to a transceiver when sending, and to a receiver when listening D. It switches a transceiver between different kinds of antennas connected to one feed line N7A09 (B) In Figure N7-1, if block 1 is a transceiver and block 3 is a dummy antenna what is block 2? A. A terminal-node switch B. An antenna switch C. A telegraph key switch D. A high-pass filter N7A10 (A) In Figure N7-2, if block 2 is an SWR meter and block 3 is an antenna switch, what is block 1? A. A transceiver B. A high-pass filter C. An antenna tuner D. A modem N7A11 (B) In Figure N7-3, if block 1 is a transceiver and block 2 is an SWR meter, what is block 3? A. An antenna switch B. An antenna tuner C. A key-click filter D. A terminal-node controller N7A12 (C) What device converts household current to 12 VDC? A. A catalytic converter B. A low-pass filter C. A power supply D. An RS-232 interface N7A13 (C) Which of these usually needs a heavy-duty power supply? A. An SWR meter B. A receiver C. A transceiver D. An antenna switch N7B Station layout and accessories for telegraphy, radiotelephone, radioteleprinter or packet N7B01 (B) What would you connect to a transceiver to send Morse code? A. A terminal-node controller B. A telegraph key C. An SWR meter D. An antenna switch N7B02 (C) Where would you connect a telegraph key to send Morse code? A. To a power supply B. To an antenna switch C. To a transceiver D. To an antenna N7B03 (B) What do many amateurs use to help form good Morse code characters? A. A key-operated on/off switch B. An electronic keyer C. A key-click filter D. A DTMF keypad N7B04 (C) Where would you connect a microphone for voice operation? A. To a power supply B. To an antenna switch C. To a transceiver D. To an antenna N7B05 (D) What would you connect to a transceiver for voice operation? A. A splatter filter B. A terminal-voice controller C. A receiver audio filter D. A microphone N7B06 (A) What would you connect to a transceiver for RTTY operation? A. A modem and a teleprinter or computer system B. A computer, a printer and a RTTY refresh unit C. A terminal voice controller D. A modem, a monitor and a DTMF keypad N7B07 (C) What would you connect between a transceiver and a computer system or teleprinter for RTTY operation? A. An RS-232 interface B. A DTMF keypad C. A modem D. A terminal-network controller N7B08 (A) What would you connect between a computer system and a transceiver for packet-radio operation? A. A terminal-node controller B. A DTMF keypad C. An SWR bridge D. An antenna tuner N7B09 (C) Where would you connect a terminal-node controller for packet- radio operation? A. Between your antenna and transceiver B. Between your computer and monitor C. Between your computer and transceiver D. Between your keyboard and computer N7B10 (D) In RTTY operation, what equipment connects to a modem? A. A DTMF keypad, a monitor and a transceiver B. A DTMF microphone, a monitor and a transceiver C. A transceiver and a terminal-network controller D. A transceiver and a teleprinter or computer system N7B11 (B) In packet-radio operation, what equipment connects to a terminal- node controller? A. A transceiver and a modem B. A transceiver and a terminal or computer system C. A DTMF keypad, a monitor and a transceiver D. A DTMF microphone, a monitor and a transceiver SUBELEMENT N8 - SIGNALS AND EMISSIONS [2 exam questions - 2 groups] N8A Emission types, key clicks, chirps or superimposed hum. N8A01 (B) How is CW usually transmitted? A. By frequency-shift keying an RF signal B. By on/off keying an RF signal C. By audio-frequency-shift keying an oscillator tone D. By on/off keying an audio-frequency signal N8A02 (A) How is RTTY usually transmitted? A. By frequency-shift keying an RF signal B. By on/off keying an RF signal C. By digital pulse-code keying of an unmodulated carrier D. By on/off keying an audio-frequency signal N8A03 (C) What is the name for international Morse code emissions? A. RTTY B. Data C. CW D. Phone N8A04 (A) What is the name for narrow-band direct-printing telegraphy emissions? A. RTTY B. Data C. CW D. Phone N8A05 (B) What is the name for packet-radio emissions? A. RTTY B. Data C. CW D. Phone N8A06 (D) What is the name for voice emissions? A. RTTY B. Data C. CW D. Phone N8A07 (D) How can you prevent key clicks? A. By sending CW more slowly B. By increasing power C. By using a better power supply D. By using a key-click filter N8A08 (C) What does chirp mean? A. An overload in a receiver's audio circuit whenever CW is received B. A high-pitched tone which is received along with a CW signal C. A small change in a transmitter's frequency each time it is keyed D. A slow change in transmitter frequency as the circuit warms up N8A09 (D) What can be done to keep a CW transmitter from chirping? A. Add a low-pass filter B. Use an RF amplifier C. Keep the power supply current very steady D. Keep the power supply voltages very steady N8A10 (D) What may cause a buzzing or hum in the signal of an HF transmitter? A. Using an antenna which is the wrong length B. Energy from another transmitter C. Bad design of the transmitter's RF power output circuit D. A bad filter capacitor in the transmitter's power supply N8A11 (A) Which sideband is commonly used for 10-meter phone operation? A. Upper-sideband B. Lower-sideband C. Amplitude-compandored sideband D. Double-sideband N8B Harmonics and unwanted signals, equipment and adjustments to help reduce interference to others. N8B01 (C) How does the frequency of a harmonic compare to the desired transmitting frequency? A. It is slightly more than the desired frequency B. It is slightly less than the desired frequency C. It is exactly two, or three, or more times the desired frequency D. It is much less than the desired frequency N8B02 (A) What is the fourth harmonic of a 7160-kHz signal? A. 28,640 kHz B. 35,800 kHz C. 28,160 kHz D. 1790 kHz N8B03 (C) If you are told your station was heard on 21,375 kHz, but at the time you were operating on 7125 kHz, what is one reason this could happen? A. Your transmitter's power-supply filter capacitor was bad B. You were sending CW too fast C. Your transmitter was radiating harmonic signals D. Your transmitter's power-supply filter choke was bad N8B04 (D) If someone tells you that signals from your hand-held transceiver are interfering with other signals on a frequency near yours, what may be the cause? A. You may need a power amplifier for your hand-held B. Your hand-held may have chirp from weak batteries C. You may need to turn the volume up on your hand-held D. Your hand-held may be transmitting spurious emissions N8B05 (D) If your transmitter sends signals outside the band where it is transmitting, what is this called? A. Off-frequency emissions B. Transmitter chirping C. Side tones D. Spurious emissions N8B06 (A) What problem may occur if your transmitter is operated without the cover and other shielding in place? A. It may transmit spurious emissions B. It may transmit a chirpy signal C. It may transmit a weak signal D. It may interfere with other stations operating near its frequency N8B07 (B) What may happen if an SSB transmitter is operated with the microphone gain set too high? A. It may cause digital interference to computer equipment B. It may cause splatter interference to other stations operating near its frequency C. It may cause atmospheric interference in the air around the antenna D. It may cause interference to other stations operating on a higher frequency band N8B08 (B) What may happen if an SSB transmitter is operated with too much speech processing? A. It may cause digital interference to computer equipment B. It may cause splatter interference to other stations operating near its frequency C. It may cause atmospheric interference in the air around the antenna D. It may cause interference to other stations operating on a higher frequency band N8B09 (B) What may happen if an FM transmitter is operated with the microphone gain or deviation control set too high? A. It may cause digital interference to computer equipment B. It may cause interference to other stations operating near its frequency C. It may cause atmospheric interference in the air around the antenna D. It may cause interference to other stations operating on a higher frequency band N8B10 (B) What may your FM hand-held or mobile transceiver do if you shout into its microphone? A. It may cause digital interference to computer equipment B. It may cause interference to other stations operating near its frequency C. It may cause atmospheric interference in the air around the antenna D. It may cause interference to other stations operating on a higher frequency band N8B11 (D) What can you do if you are told your FM hand-held or mobile transceiver is over deviating? A. Talk louder into the microphone B. Let the transceiver cool off C. Change to a higher power level D. Talk farther away from the microphone SUBELEMENT N9 - ANTENNAS AND FEED LINES [3 exam questions - 3 groups] N9A Wavelength vs antenna length. N9A01 (D) How do you calculate the length (in feet) of a half-wavelength dipole antenna? A. Divide 150 by the antenna's operating frequency (in MHz) [150/f(in MHz)] B. Divide 234 by the antenna's operating frequency (in MHz) [234/f (in MHz)] C. Divide 300 by the antenna's operating frequency (in MHz) [300/f (in MHz)] D. Divide 468 by the antenna's operating frequency (in MHz) [468/f (in MHz)] N9A02 (B) How do you calculate the length (in feet) of a quarter-wavelength vertical antenna? A. Divide 150 by the antenna's operating frequency (in MHz) [150/f (in MHz)] B. Divide 234 by the antenna's operating frequency (in MHz) [234/f (in MHz)] C. Divide 300 by the antenna's operating frequency (in MHz) [300/f (in MHz)] D. Divide 468 by the antenna's operating frequency (in MHz) [468/f (in MHz)] N9A03 (A) If you made a half-wavelength dipole antenna for 3725 kHz, how long would it be (to the nearest foot)? A. 126 ft B. 81 ft C. 63 ft D. 40 ft N9A04 (C) If you made a half-wavelength dipole antenna for 28.150 MHz, how long would it be (to the nearest foot)? A. 22 ft B. 11 ft C. 17 ft D. 34 ft N9A05 (D) If you made a quarter-wavelength vertical antenna for 7125 kHz, how long would it be (to the nearest foot)? A. 11 ft B. 16 ft C. 21 ft D. 33 ft N9A06 (B) If you made a quarter-wavelength vertical antenna for 21.125 MHz, how long would it be (to the nearest foot)? A. 7 ft B. 11 ft C. 14 ft D. 22 ft N9A07 (C) If you made a half-wavelength vertical antenna for 223 MHz, how long would it be (to the nearest inch)? A. 112 inches B. 50 inches C. 25 inches D. 12 inches N9A08 (A) If an antenna is made longer, what happens to its resonant frequency? A. It decreases B. It increases C. It stays the same D. It disappears N9A09 (B) If an antenna is made shorter, what happens to its resonant frequency? A. It decreases B. It increases C. It stays the same D. It disappears N9A10 (A) How could you lower the resonant frequency of a dipole antenna? A. Lengthen the antenna B. Shorten the antenna C. Use less feed line D. Use a smaller size feed line N9A11 (B) How could you raise the resonant frequency of a dipole antenna? A. Lengthen the antenna B. Shorten the antenna C. Use more feed line D. Use a larger size feed line N9B Yagi parts, concept of directional antennas, and safety near antennas. N9B01 (B) In what direction does a Yagi antenna send out radio energy? A. It goes out equally in all directions B. Most of it goes in one direction C. Most of it goes equally in two opposite directions D. Most of it is aimed high into the air N9B02 (C) About how long is the driven element of a Yagi antenna? A. 1/4 wavelength B. 1/3 wavelength C. 1/2 wavelength D. 1 wavelength N9B03 (D) In Diagram N9-1, what is the name of element 2 of the Yagi antenna? A. Director B. Reflector C. Boom D. Driven element N9B04 (A) In Diagram N9-1, what is the name of element 3 of the Yagi antenna? A. Director B. Reflector C. Boom D. Driven element N9B05 (B) In Diagram N9-1, what is the name of element 1 of the Yagi antenna? A. Director B. Reflector C. Boom D. Driven element N9B06 (B) Looking at the Yagi antenna in Diagram N9-1, in which direction on the page would it send most of its radio energy? A. Left B. Right C. Top D. Bottom N9B07 (B) Why is a 5/8-wavelength vertical antenna better than a 1/4- wavelength vertical antenna for VHF or UHF mobile operations? A. A 5/8-wavelength antenna can handle more power B. A 5/8-wavelength antenna has more gain C. A 5/8-wavelength antenna has less corona loss D. A 5/8-wavelength antenna is easier to install on a car N9B08 (C) In what direction does a vertical antenna send out radio energy? A. Most of it goes in two opposite directions B. Most of it goes high into the air C. Most of it goes equally in all horizontal directions D. Most of it goes in one direction N9B09 (C) If the ends of a half-wave dipole antenna point east and west, which way would the antenna send out radio energy? A. Equally in all directions B. Mostly up and down C. Mostly north and south D. Mostly east and west N9B10 (A) How should you hold the antenna of a hand-held transceiver while you are transmitting? A. Away from your head and away from others B. Pointed towards the station you are contacting C. Pointed away from the station you are contacting D. Pointed down to bounce the signal off the ground N9B11 (B) Why should your outside antennas be high enough so that no one can touch them while you are transmitting? A. Touching the antenna might cause television interference B. Touching the antenna might cause RF burns C. Touching the antenna might radiate harmonics D. Touching the antenna might reflect the signal back to the transmitter and cause damage N9C Feed lines, baluns and polarization via element orientation. N9C01 (D) What is a coaxial cable? A. Two wires side-by-side in a plastic ribbon B. Two wires side-by-side held apart by insulating rods C. Two wires twisted around each other in a spiral D. A center wire inside an insulating material covered by a metal sleeve or shield N9C02 (B) Why does coaxial cable make a good antenna feed line? A. You can make it at home, and its impedance matches most amateur antennas B. It is weatherproof, and its impedance matches most amateur antennas C. It is weatherproof, and its impedance is higher than that of most amateur antennas D. It can be used near metal objects, and its impedance is higher than that of most amateur antennas N9C03 (B) Which kind of antenna feed line can carry radio energy very well even if it is buried in the ground? A. Twin lead B. Coaxial cable C. Parallel conductor D. Twisted pair N9C04 (A) What is the best antenna feed line to use if it must be put near grounded metal objects? A. Coaxial cable B. Twin lead C. Twisted pair D. Ladder-line N9C05 (B) What is parallel-conductor feed line? A. Two wires twisted around each other in a spiral B. Two wires side-by-side held apart by insulating rods C. A center wire inside an insulating material which is covered by a metal sleeve or shield D. A metal pipe which is as wide or slightly wider than a wavelength of the signal it carries N9C06 (D) What are some reasons to use parallel-conductor feed line? A. It has low impedance, and will operate with a high SWR B. It will operate with a high SWR, and it works well when tied down to metal objects C. It has a low impedance, and has less loss than coaxial cable D. It will operate with a high SWR, and has less loss than coaxial cable N9C07 (A) What are some reasons not to use parallel-conductor feed line? A. It does not work well when tied down to metal objects, and you must use an impedance-matching device with your transceiver B. It is difficult to make at home, and it does not work very well with a high SWR C. It does not work well when tied down to metal objects, and it cannot operate under high power D. You must use an impedance-matching device with your transceiver, and it does not work very well with a high SWR N9C08 (B) What kind of antenna feed line is made of two conductors held apart by insulated rods? A. Coaxial cable B. Open-conductor ladder line C. Twin lead in a plastic ribbon D. Twisted pair N9C09 (C) What would you use to connect a coaxial cable of 50-ohms impedance to an antenna of 35-ohms impedance? A. A terminating resistor B. An SWR meter C. An impedance-matching device D. A low-pass filter N9C10 (D) What does balun mean? A. Balanced antenna network B. Balanced unloader C. Balanced unmodulator D. Balanced to unbalanced N9C11 (A) Where would you install a balun to feed a dipole antenna with 50- ohm coaxial cable? A. Between the coaxial cable and the antenna B. Between the transmitter and the coaxial cable C. Between the antenna and the ground D. Between the coaxial cable and the ground