00-Technician Test Flashcards by Dennis Dickenson

What term describes the number of times per second that an alternating current reverses direction?
A. Pulse rate
B. Speed
C. Wavelength
D. Frequency

D. Frequency

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What is the unit of frequency?
A. Hertz
B. Henry
C. Farad
D. Tesla

A. Hertz

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What does the abbreviation “RF” refer to?
A. Radio frequency signals of all types
B. The resonant frequency of a tuned circuit
C. The real frequency transmitted as opposed to the apparent frequency
D. Reflective force in antenna transmission lines

A. Radio frequency signals of all types

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What are the frequency limits of the VHF spectrum?
A. 30 to 300 kHz
B. 30 to 300 MHz
C. 300 to 3000 kHz
D. 300 to 3000 MHz

B. 30 to 300 MHz

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What are the frequency limits of the UHF spectrum?
A. 30 to 300 kHz
B. 30 to 300 MHz
C. 300 to 3000 kHz
D. 300 to 3000 MHz

D. 300 to 3000 MHz

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What frequency range is referred to as HF?
A. 300 to 3000 MHz
B. 30 to 300 MHz
C. 3 to 30 MHz
D. 300 to 3000 kHz

C. 3 to 30 MHz

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What is the name for the distance a radio wave travels during one complete cycle?
A. Wave speed
B. Waveform
C. Wavelength
D. Wave spread

C. Wavelength

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How fast does a radio wave travel through free space?
A. At the speed of light
B. At the speed of sound
C. Its speed is inversely proportional to its wavelength
D. Its speed increases as the frequency increases

A. At the speed of light

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What is the approximate velocity of a radio wave as it travels through free space?
A. 3000 kilometers per second
B. 300,000,000 meters per second
C. 300,000 miles per hour
D. 186,000 miles per hour

B. 300,000,000 meters per second

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How does the wavelength of a radio wave relate to its frequency?
A. The wavelength gets longer as the frequency increases
B. The wavelength gets shorter as the frequency increases
C. There is no relationship between wavelength and frequency
D. The wavelength depends on the bandwidth of the signal

B. The wavelength gets shorter as the frequency increases

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What property of radio waves is often used to identify the different frequency bands?
A. The approximate wavelength
B. The magnetic intensity of waves
C. The time it takes for waves to travel one mile
D. The voltage standing wave ratio of waves

A. The approximate wavelength

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What is the formula for converting frequency to approximate wavelength in meters?
A. Wavelength in meters equals frequency in hertz multiplied by 300
B. Wavelength in meters equals frequency in hertz divided by 300
C. Wavelength in meters equals frequency in megahertz divided by 300
D. Wavelength in meters equals 300 divided by frequency in megahertz

D. Wavelength in meters equals 300 divided by frequency in megahertz

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Which of the following is a form of amplitude modulation?
A. Spread-spectrum
B. Packet radio
C. Single sideband
D. Phase shift keying

C. Single sideband

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What happens when the deviation of an FM transmitter is increased?
A. Its signal occupies more bandwidth
B. Its output power increases
C. Its output power and bandwidth increases
D. Asymmetric modulation occurs

A. Its signal occupies more bandwidth

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What could cause your FM signal to interfere with stations on nearby frequencies?
A. Microphone gain too high, causing over-deviation
B. SWR too high
C. Incorrect CTCSS Tone
D. All of these choices are correct

A. Microphone gain too high, causing over-deviation

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Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band?
A. To allow for calibration error in the transmitter frequency display
B. So that modulation sidebands do not extend beyond the band edge
C. To allow for transmitter frequency drift
D. All of these choices are correct

D. All of these choices are correct

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What determines the amount of deviation of an FM (as opposed to PM) signal?
A. Both the frequency and amplitude of the modulating signal
B. The frequency of the modulating signal
C. The amplitude of the modulating signal
D. The relative phase of the modulating signal and the carrier

C. The amplitude of the modulating signal

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What type of modulation is most commonly used for VHF packet radio transmissions?
A. FM
B. SSB
C. AM
D. Spread Spectrum

A. FM

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Which type of voice mode is most often used for long-distance (weak signal) contacts on the VHF and UHF bands?
A. FM
B. DRM
C. SSB
D. PM

C. SSB

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Which type of modulation is most commonly used for VHF and UHF voice repeaters?
A. AM
B. SSB
C. PSK
D. FM

D. FM

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Which of the following types of emission has the narrowest bandwidth?
A. FM voice
B. SSB voice
C. CW
D. Slow-scan TV

C. CW

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Which sideband is normally used for 10 meter HF, VHF and UHF single-sideband communications?
A. Upper sideband
B. Lower sideband
C. Suppressed sideband
D. Inverted sideband

A. Upper sideband

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What is the primary advantage of single sideband over FM for voice transmissions?
A. SSB signals are easier to tune
B. SSB signals are less susceptible to interference
C. SSB signals have narrower bandwidth
D. All of these choices are correct

C. SSB signals have narrower bandwidth

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What is the approximate bandwidth of a single sideband voice signal?
A. 1 kHz
B. 3 kHz
C. 6 kHz
D. 15 kHz

B. 3 kHz

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``` What is the approximate bandwidth of a VHF repeater FM phone signal? A. Less than 500 Hz B. About 150 kHz C. Between 10 and 15 kHz D. Between 50 and 125 kHz ~~ ```

C. Between 10 and 15 kHz

``` What is the typical bandwidth of analog fast-scan TV transmissions on the 70 cm band? A. More than 10 MHz B. About 6 MHz C. About 3 MHz D. About 1 MHz ```

B. About 6 MHz

``` What is the approximate maximum bandwidth required to transmit a CW signal? A. 2.4 kHz B. 150 Hz C. 1000 Hz D. 15 kHz ```

B. 150 Hz

``` What type of amateur station simultaneously retransmits the signal of another amateur station on a different channel or channels? A. Beacon station B. Earth station C. Repeater station D. Message forwarding station ```

C. Repeater station

What is a transceiver? A. A type of antenna switch B. A unit combining the functions of a transmitter and a receiver C. A component in a repeater which filters out unwanted interference D. A type of antenna matching network

B. A unit combining the functions of a transmitter and a receiver

``` Electrical current is measured in which of the following units? A. Volts B. Watts C. Ohms D. Amperes ```

D. Amperes

``` What is the name for the flow of electrons in an electric circuit? A. Voltage B. Resistance C. Capacitance D. Current ```

D. Current

``` What is the electrical term for the electromotive force (EMF) that causes electron flow? A. Voltage B. Ampere-hours C. Capacitance D. Inductance ```

A. Voltage

``` What is the basic unit of electromotive force? A. The volt B. The watt C. The ampere D. The ohm ```

A. The volt

``` Which instrument would you use to measure electric potential or electromotive force? A. An ammeter B. A voltmeter C. A wavemeter D. An ohmmeter ```

B. A voltmeter

``` What is the correct way to connect a voltmeter to a circuit? A. In series with the circuit B. In parallel with the circuit C. In quadrature with the circuit D. In phase with the circuit ```

B. In parallel with the circuit

``` How is an ammeter usually connected to a circuit? A. In series with the circuit B. In parallel with the circuit C. In quadrature with the circuit D. In phase with the circuit ```

A. In series with the circuit

``` Which instrument is used to measure electric current? A. An ohmmeter B. A wavemeter C. A voltmeter D. An ammeter ```

D. An ammeter

``` How many milliamperes is 1.5 amperes? A. 15 milliamperes B. 150 milliamperes C. 1,500 milliamperes D. 15,000 milliampere ```

C. 1,500 milliamperes

``` What is another way to specify a radio signal frequency of 1,500,000 hertz? A. 1500 kHz B. 1500 MHz C. 15 GHz D. 150 kHz ```

A. 1500 kHz

``` How many volts are equal to one kilovolt? A. One one-thousandth of a volt B. One hundred volts C. One thousand volts D. One million volts ```

C. One thousand volts

``` How many volts are equal to one microvolt? A. One one-millionth of a volt B. One million volts C. One thousand kilovolts D. One one-thousandth of a volt ```

A. One one-millionth of a volt

``` Which of the following is equivalent to 500 milliwatts? A. 0.02 watts B. 0.5 watts C. 5 watts D. 50 watts ```

B. 0.5 watts

``` If an ammeter calibrated 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 ```

C. 3 amperes

``` If a frequency readout calibrated in megahertz shows a reading of 3.525 MHz, what would it show if it were calibrated in kilohertz? A. 0.003525 kHz B. 35.25 kHz C. 3525 kHz D. 3,525,000 kHz ```

C. 3525 kHz

``` How many microfarads are 1,000,000 picofarads? A. 0.001 microfarads B. 1 microfarad C. 1000 microfarads D. 1,000,000,000 microfarads ```

B. 1 microfarad

``` Which of the following frequencies is equal to 28,400 kHz? A. 28.400 MHz B. 2.800 MHz C. 284.00 MHz D. 28.400 kHz ```

A. 28.400 MHz

``` If a frequency readout shows a reading of 2425 MHz, what frequency is that in GHz? A. 0.002425 GHZ B. 24.25 GHz C. 2.425 GHz D. 2425 GHz ```

C. 2.425 GHz

Which of the following might damage a multimeter? A. Measuring a voltage too small for the chosen scale B. Leaving the meter in the milliamps position overnight C. Attempting to measure voltage when using the resistance setting D. Not allowing it to warm up properly

C. Attempting to measure voltage when using the resistance setting

``` Which of the following measurements are commonly made using a multimeter? A. SWR and RF power B. Signal strength and noise C. Impedance and reactance D. Voltage and resistance ```

D. Voltage and resistance

What is probably happening when an ohmmeter, connected across an unpowered circuit, initially indicates a low resistance and then shows increasing resistance with time? A. The ohmmeter is defective B. The circuit contains a large capacitor C. The circuit contains a large inductor D. The circuit is a relaxation oscillator

B. The circuit contains a large capacitor

Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter? A. Ensure that the applied voltages are correct B. Ensure that the circuit is not powered C. Ensure that the circuit is grounded D. Ensure that the circuit is operating at the correct frequency

B. Ensure that the circuit is not powered

Which of the following precautions should be taken when measuring high voltages with a voltmeter? A. Ensure that the voltmeter has very low impedance B. Ensure that the voltmeter and leads are rated for use at the voltages to be measured C. Ensure that the circuit is grounded through the voltmeter D. Ensure that the voltmeter is set to the correct frequency

B. Ensure that the voltmeter and leads are rated for use at the voltages to be measured

``` What instrument is used to measure resistance? A. An oscilloscope B. A spectrum analyzer C. A noise bridge D. An ohmmeter ```

D. An ohmmeter

``` Which of the following is a good electrical conductor? A. Glass B. Wood C. Copper D. Rubber ~~ ```

C. Copper

``` Which of the following is a good electrical insulator? A. Copper B. Glass C. Aluminum D. Mercury ```

B. Glass

What formula is used to calculate current in a circuit? A. Current (I) equals voltage (E) multiplied by resistance (R) B. Current (I) equals voltage (E) divided by resistance (R) C. Current (I) equals voltage (E) added to resistance (R) D. Current (I) equals voltage (E) minus resistance (R) ~~

B. Current (I) equals voltage (E) divided by resistance (R)

What formula is used to calculate voltage in a circuit? A. Voltage (E) equals current (I) multiplied by resistance (R) B. Voltage (E) equals current (I) divided by resistance (R) C. Voltage (E) equals current (I) added to resistance (R) D. Voltage (E) equals current (I) minus resistance (R)

A. Voltage (E) equals current (I) multiplied by resistance (R)

What formula is used to calculate resistance in a circuit? A. Resistance (R) equals voltage (E) multiplied by current (I) B. Resistance (R) equals voltage (E) divided by current (I) C. Resistance (R) equals voltage (E) added to current (I) D. Resistance (R) equals voltage (E) minus current (I)

B. Resistance (R) equals voltage (E) divided by current (I)

``` What is the resistance of a circuit in which a current of 3 amperes flows through a resistor connected to 90 volts? A. 3 ohms B. 30 ohms C. 93 ohms D. 270 ohms ```

B. 30 ohms

``` What is the resistance in a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes? A. 18 ohms B. 0.125 ohms C. 8 ohms D. 13.5 ohms ```

C. 8 ohms

``` What is the resistance of a circuit that draws 4 amperes from a 12-volt source? A. 3 ohms B. 16 ohms C. 48 ohms D. 8 Ohms ```

A. 3 ohms

``` What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms? A. 9600 amperes B. 200 amperes C. 0.667 amperes D. 1.5 amperes ```

D. 1.5 amperes

``` What is the current flowing through a 100-ohm resistor connected across 200 volts? A. 20,000 amperes B. 0.5 amperes C. 2 amperes D. 100 amperes ```

C. 2 amperes

``` What is the current flowing through a 24-ohm resistor connected across 240 volts? A. 24,000 amperes B. 0.1 amperes C. 10 amperes D. 216 amperes ```

C. 10 amperes

``` What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it? A. 1 volt B. 0.25 volts C. 2.5 volts D. 1.5 volts ~~ ```

A. 1 volt

``` What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it? A. 1 volt B. 10 volts C. 11 volts D. 9 volts ```

B. 10 volts

``` What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it? A. 8 volts B. 0.2 volts C. 12 volts D. 20 volts ```

D. 20 volts

``` Electrical power is measured in which of the following units? A. Volts B. Watts C. Ohms D. Amperes ```

B. Watts

``` What is the name for a current that flows only in one direction? A. Alternating current B. Direct current C. Normal current D. Smooth current ```

B. Direct current

``` What is the name for a current that reverses direction on a regular basis? A. Alternating current B. Direct current C. Circular current D. Vertical current ```

A. Alternating current

``` Which term describes the rate at which electrical energy is used? A. Resistance B. Current C. Power D. Voltage ~~ ```

C. Power

What is the formula used to calculate electrical power in a DC circuit? A. Power (P) equals voltage (E) multiplied by current (I) B. Power (P) equals voltage (E) divided by current (I) C. Power (P) equals voltage (E) minus current (I) D. Power (P) equals voltage (E) plus current (I) ~~

A. Power (P) equals voltage (E) multiplied by current (I)

``` How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes? A. 138 watts B. 0.7 watts C. 23.8 watts D. 3.8 watts ```

A. 138 watts

``` How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes? A. 4.8 watts B. 30 watts C. 14.5 watts D. 0.208 watts ```

B. 30 watts

``` How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts? A. 0.1 amperes B. 10 amperes C. 12 amperes D. 132 amperes ```

B. 10 amperes

``` What is the ability to store energy in an electric field called? A. Inductance B. Resistance C. Tolerance D. Capacitance ```

D. Capacitance

``` What is the basic unit of capacitance? A. The farad B. The ohm C. The volt D. The henry ```

A. The farad

``` What is the ability to store energy in a magnetic field called? A. Admittance B. Capacitance C. Resistance D. Inductance ```

D. Inductance

``` What is the basic unit of inductance? A. The coulomb B. The farad C. The henry D. The ohm ```

C. The henry

``` What electrical component is used to oppose the flow of current in a DC circuit? A. Inductor B. Resistor C. Voltmeter D. Transformer ```

B. Resistor

``` What type of component is often used as an adjustable volume control? A. Fixed resistor B. Power resistor C. Potentiometer D. Transformer ```

C. Potentiometer

``` What electrical parameter is controlled by a potentiometer? A. Inductance B. Resistance C. Capacitance D. Field strength ```

B. Resistance

``` What electrical component stores energy in an electric field? A. Resistor B. Capacitor C. Inductor D. Diode ```

B. Capacitor

``` What type of electrical component consists of two or more conductive surfaces separated by an insulator? A. Resistor B. Potentiometer C. Oscillator D. Capacitor ```

D. Capacitor

``` What type of electrical component stores energy in a magnetic field? A. Resistor B. Capacitor C. Inductor D. Diode ```

C. Inductor

``` What electrical component is usually composed of a coil of wire? A. Switch B. Capacitor C. Diode D. Inductor ```

D. Inductor

``` What component is commonly used to change 120V AC house current to a lower AC voltage for other uses? A. Variable capacitor B. Transformer C. Transistor D. Diode ```

B. Transformer

What is meant by the term impedance? A. It is a measure of the opposition to AC current flow in a circuit B. It is the inverse of resistance C. It is a measure of the Q or Quality Factor of a component D. It is a measure of the power handling capability of a component ~~

A. It is a measure of the opposition to AC current flow in a circuit

``` What are the units of impedance? A. Volts B. Amperes C. Coulombs D. Ohms ```

D. Ohms

``` Which of the following is used together with an inductor to make a tuned circuit? A. Resistor B. Zener diode C. Potentiometer D. Capacitor ```

D. Capacitor

What is a simple resonant or tuned circuit? A. An inductor and a capacitor connected in series or parallel to form a filter B. A type of voltage regulator C. A resistor circuit used for reducing standing wave ratio D. A circuit designed to provide high fidelity audio

A. An inductor and a capacitor connected in series or parallel to form a filter

``` What electrical component is used to connect or disconnect electrical circuits? A. Magnetron B. Switch C. Thermistor D. All of these choices are correct ```

B. Switch

``` What electrical component is used to protect other circuit components from current overloads? A. Fuse B. Capacitor C. Inductor D. All of these choices are correct ```

A. Fuse

``` What best describes a relay? A. A switch controlled by an electromagnet B. A current controlled amplifier C. An optical sensor D. A pass transistor ```

A. A switch controlled by an electromagnet

``` What type of switch is represented by component 3 in figure T2? A. Single-pole single-throw B. Single-pole double-throw C. Double-pole single-throw D. Double-pole double-throw ```

A. Single-pole single-throw

``` Which of the following can be used to display signal strength on a numeric scale? A. Potentiometer B. Transistor C. Meter D. Relay ```

C. Meter

What is the purpose of a fuse in an electrical circuit? A. To prevent power supply ripple from damaging a circuit B. To interrupt power in case of overload C. To limit current to prevent shocks D. All of these choices are correct ~~

B. To interrupt power in case of overload

Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse? A. The larger fuse would be likely to blow because it is rated for higher current B. The power supply ripple would greatly increase C. Excessive current could cause a fire D. All of these choices are correct ~~

C. Excessive current could cause a fire

``` What class of electronic components is capable of using a voltage or current signal to control current flow? A. Capacitors B. Inductors C. Resistors D. Transistors ```

D. Transistors

``` What electronic component allows current to flow in only one direction? A. Resistor B. Fuse C. Diode D. Driven Element ```

C. Diode

``` Which of these components can be used as an electronic switch or amplifier? A. Oscillator B. Potentiometer C. Transistor D. Voltmeter ```

C. Transistor

``` Which of the following components can be made of three layers of semiconductor material? A. Alternator B. Transistor C. Triode D. Pentagrid converter ```

B. Transistor

``` Which of the following electronic components can amplify signals? A. Transistor B. Variable resistor C. Electrolytic capacitor D. Multi-cell battery ```

A. Transistor

``` How is the cathode lead of a semiconductor diode usually identified? A. With the word cathode B. With a stripe C. With the letter C D. All of these choices are correct ~~ ```

B. With a stripe

``` What does the abbreviation LED stand for? A. Low Emission Diode B. Light Emitting Diode C. Liquid Emission Detector D. Long Echo Delay ```

B. Light Emitting Diode

``` What does the abbreviation FET stand for? A. Field Effect Transistor B. Fast Electron Transistor C. Free Electron Transition D. Field Emission Thickness ```

A. Field Effect Transistor

``` What are the names of the two electrodes of a diode? A. Plus and minus B. Source and drain C. Anode and cathode D. Gate and base ```

C. Anode and cathode

``` What are the three electrodes of a PNP or NPN transistor? A. Emitter, base, and collector B. Source, gate, and drain C. Cathode, grid, and plate D. Cathode, drift cavity, and collector ```

A. Emitter, base, and collector

``` What at are the three electrodes of a field effect transistor? A. Emitter, base, and collector B. Source, gate, and drain C. Cathode, grid, and plate D. Cathode, gate, and anode ```

B. Source, gate, and drain

``` What is the term that describes a transistor's ability to amplify a signal? A. Gain B. Forward resistance C. Forward voltage drop D. On resistance ```

A. Gain

``` Which of the following devices or circuits changes an alternating current into a varying direct current signal? A. Transformer B. Rectifier C. Amplifier D. Reflector ```

B. Rectifier

``` Which of the following is commonly used as a visual indicator? A. LED B. FET C. Zener diode D. Bipolar transistor ```

A. LED

``` What is the name of a device that combines several semiconductors and other components into one package? A. Transducer B. Multi-pole relay C. Integrated circuit D. Transformer ```

C. Integrated circuit

What is the function of component 2 in Figure T1? A. Give off light when current flows through it B. Supply electrical energy C. Control the flow of current D. Convert electrical energy into radio waves ~~

C. Control the flow of current

``` What is the name for standardized representations of components in an electrical wiring diagram? A. Electrical depictions B. Grey sketch C. Schematic symbols D. Component callouts ```

C. Schematic symbols

``` What is component 1 in figure T1? A. Resistor B. Transistor C. Battery D. Connector ```

A. Resistor

``` What is component 2 in figure T1? A. Resistor B. Transistor C. Indicator lamp D. Connector ```

B. Transistor

``` What is component 3 in figure T1? A. Resistor B. Transistor C. Lamp D. Ground symbol ```

C. Lamp

``` What is component 4 in figure T1? A. Resistor B. Transistor C. Battery D. Ground symbol ```

C. Battery

``` What is component 6 in figure T2? A. Resistor B. Capacitor C. Regulator IC D. Transistor ```

B. Capacitor

``` What is component 8 in figure T2? A. Resistor B. Inductor C. Regulator IC D. Light emitting diode ```

D. Light emitting diode

``` What is component 9 in figure T2? A. Variable capacitor B. Variable inductor C. Variable resistor D. Variable transformer ```

C. Variable resistor

``` What is component 4 in figure T2? A. Variable inductor B. Double-pole switch C. Potentiometer D. Transformer ```

D. Transformer

``` What is component 3 in figure T3? A. Connector B. Meter C. Variable capacitor D. Variable inductor ```

D. Variable inductor

``` What is component 4 in figure T3? A. Antenna B. Transmitter C. Dummy load D. Ground ```

A. Antenna

``` What do the symbols on an electrical circuit schematic diagram represent? A. Electrical components B. Logic states C. Digital codes D. Traffic nodes ```

A. Electrical components

``` Which of the following is accurately represented in electrical circuit schematic diagrams? A. Wire lengths B. Physical appearance of components C. The way components are interconnected D. All of these choices are correct ```

C. The way components are interconnected

``` Which of the following is used to convert a radio signal from one frequency to another? A. Phase splitter B. Mixer C. Inverter D. Amplifier ~~ ```

B. Mixer

``` What is the name of a circuit that generates a signal of a desired frequency? A. Reactance modulator B. Product detector C. Low-pass filter D. Oscillator ```

D. Oscillator | ~~

``` Which of the following describes combining speech with an RF carrier signal?- A. Impedance matching B. Oscillation C. Modulation D. Low-pass filtering ~~ ```

C. Modulation

``` Which term describes the ability of a receiver to detect the presence of a signal? A. Linearity B. Sensitivity C. Selectivity D. Total Harmonic Distortion ```

B. Sensitivity

``` Which term describes the ability of a receiver to discriminate between multiple signals? A. Discrimination ratio B. Sensitivity C. Selectivity D. Harmonic Distortion ```

. Selectivity

``` What device takes the output of a low-powered 28 MHz SSB exciter and produces a 222 MHz output signal? A. High-pass filter B. Low-pass filter C. Transverter D. Phase converter ```

C. Transverter

Where is an RF preamplifier installed? A. Between the antenna and receiver B. At the output of the transmitter's power amplifier C. Between a transmitter and antenna tuner D. At the receiver's audio output

A. Between the antenna and receiver