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Transcript of Technician Licensing Class
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Technician Licensing Class
Picture This!Page 141 to 150
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2
Amateur Radio Technician ClassElement 2 Course Presentation
ELEMENT 2 SUB-ELEMENTS (Groupings)
• About Ham Radio• Call Signs• Control• Mind the Rules• Tech Frequencies• Your First Radio• Going On The Air!• Repeaters• Emergency!• Weak Signal Propagation
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3
Amateur Radio Technician ClassElement 2 Course Presentation
ELEMENT 2 SUB-ELEMENTS (Groupings)
• Talk to Outer Space!• Your Computer Goes Ham Digital!• Multi-Mode Radio Excitement• Run Some Interference Protection• Electrons – Go With the Flow!• It’s the Law, per Mr. Ohm!Picture This!• Antennas• Feed Me with Some Good Coax!• Safety First!
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Valid July 1, 2010
Through
June 30, 2014
Picture This!
Element 2 Technician Class Question Pool
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T6C01 What is the name for standardized representations of components in an electrical wiring diagram?
A. Electrical depictionsB. Grey sketchC. Schematic
symbolsD. Component
callouts
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T6C12 What do the symbols on an electrical circuit schematic diagram represent?
A. Electrical componentsB. Logic statesC. Digital
codesD. Traffic
nodes
CAPACITORCAPACITOR
RESISTORRESISTOR
DIODEDIODELEDLED
TRANSISTORTRANSISTOR
BATTERYBATTERY
ANTENNAANTENNA
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T6C13 Which of the following is accurately represented in electrical circuit schematic diagrams?
A. Wire lengthsB. Physical appearance of componentsC. The way components are interconnectedD. All of these choices
20m CW Transmitt
er by ON6M
U
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T6C10 What is component 3 in Figure T3?
A. ConnectorB. MeterC. Variable capacitorD. Variable inductor
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T6C11 What is component 4 in Figure T3?
A. AntennaB. TransmitterC. Dummy loadD. Ground
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T6D08 Which of the following is used together with an inductor to make a tuned circuit?
A. ResistorB. Zener diodeC. PotentiometerD. Capacitor
Tank Circuit or Tuned Circuit
VariableCapacitor
s
Inductor
Tank Circuit
Schematic
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T6C02 What is component 1 in Figure T1?
A. ResistorB. TransistorC. BatteryD. connector
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T6C03 What is component 2 in Figure T1?
A. ResistorB. TransistorC. Indicator lampD. Connector
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T6D10 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
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T6C04 What is component 3 in Figure T1?
A. ResistorB. TransistorC. LampD. Ground symbol
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T6C05 What is component 4 in Figure T1?
A. ResistorB. TransistorC. BatteryD. Ground symbol
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T6D03 What type of switch is represented by item 3 in Figure T2?
A. Single-pole single-throwB. Single-pole double-throwC. Double-pole single-throwD. Double-pole double-throw
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T6C09 What is component 4 in Figure T2?
A. Variable inductorB. Double-pole switchC. PotentiometerD. Transformer
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T6C06 What is component 6 in Figure T2?
A. ResistorB. CapacitorC. Regulator ICD. Transistor
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T6C07 What is component 8 in Figure T2?
A. ResistorB. InductorC. Regulator ICD. Light emitting diode
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T6C08 What is component 9 in Figure T2?
A. Variable capacitorB. Variable inductorC. Variable resistorD. Variable transformer
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T6D04 Which of the following can be used to display signal strength on a numeric scale?
A. PotentiometerB. TransistorC. MeterD. Relay
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T6D02 What best describes a relay?
A. A switch controlled by an electromagnetB. A current controlled amplifierC. An optical sensorD. A pass transistor
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T5B09 What is the approximate amount of change, measured in decibels (dB), of a power increase from 5 watts to 10 watts?
A. 2 dBB. 3 dBC. 5 dBD. 10 dB
3 dB6 dB9 dB
10 dB20 dB30 dB40 dB
2x4x8x
10x100x
1000x10,000x
dB Change
• 3 dB gain = a factor of 2.
• “twice as much” is +3 db
• “half as much” is –3 db
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T5B10 What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts?
A. 1 dBB. 3 dBC. 6 dBD. 9 dB
3 dB6 dB9 dB
10 dB20 dB30 dB40 dB
2x4x8x
10x100x
1000x10,000x
dB Change
• 3 dB gain = a factor of 2.
• “twice as much” is +3 db
• “half as much” is –3 db
12
3— = 4x 6 db
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T5B11 What is the approximate amount of change, measured in decibels (dB), of a power increase from 20 watts to 200 watts?
A. 10 dBB. 12 dBC. 18 dBD. 28 dB
3 dB6 dB9 dB
10 dB20 dB30 dB40 dB
2x4x8x
10x100x
1000x10,000x
dB Change
• 3 dB gain = a factor of 2.
• “twice as much” is +3 db
• “half as much” is –3 db
200
20— = 10x 10 db
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T6D05 What type of circuit controls the amount of voltage from a power supply?
A. RegulatorB. OscillatorC. FilterD. Phase inverter Voltage Regulator
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T6D06 What component is commonly used to change 120V AC house current to a lower AC voltage for other uses?
A. Variable capacitorB. TransformerC. TransistorD. Diode Voltage
Transformer
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T6D09 What is the name of a device that combines several semiconductors and other components into one package?
A. TransducerB. Multi-pole relayC. Integrated circuitD. Transformer Integrated Circuit Chips
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T6B07 What does the abbreviation "LED" stand for?
A. Low Emission DiodeB. Light Emitting DiodeC. Liquid Emission DetectorD. Long Echo Delay
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T6D07 Which of the following is commonly used as a visual indicator?
A. LEDB. FETC. Zener diodeD. Bipolar transistor
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T5B02 What is another way to specify a radio signal frequency of 1,500,000 hertz?
A. 1500 kHzB. 1500 MHzC. 15 GHzD. 15 kHz
Metric Exponent English
Tera-
1012
Trillion Giga-
109
Billion Mega-
106
Million Kilo-
103
Thousand
Centi
10-2
Hundredth Milli-
10-3
Thousandth Micro-
10-6
Millionth Nano-
10-9
Billionth
Pico-
10-12
Trillionth
1500 kilo = 1500 x 1000 = 1,500,000
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T5B03 How many volts are equal to one kilovolt?
A. One one-thousandth of a voltB. One hundred voltsC. One thousand voltsD. One million volts
Metric Exponent English
Tera-
1012
Trillion Giga-
109
Billion Mega-
106
Million Kilo-
103
Thousand
Centi
10-2
Hundredth Milli-
10-3
Thousandth Micro-
10-6
Millionth Nano-
10-9
Billionth
Pico-
10-12
Trillionth
1 kilo = 1 x 1000 = 1,000
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T5B06 If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show?
A. 0.003 amperesB. 0.3 amperesC. 3 amperesD. 3,000,000 amperes
Metric Exponent English
Tera-
1012
Trillion Giga-
109
Billion Mega-
106
Million Kilo-
103
Thousand
Centi
10-2
Hundredth Milli-
10-3
Thousandth Micro-
10-6
Millionth Nano-
10-9
Billionth
Pico-
10-12
Trillionth
1 3000 milli- = 3000 x = 3 1000
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T5B05 Which of the following is equivalent to 500 milliwatts?
A. 0.02 wattsB. 0.5 wattsC. 5 wattsD. 50 watts
Metric Exponent English
Tera-
1012
Trillion Giga-
109
Billion Mega-
106
Million Kilo-
103
Thousand
Centi
10-2
Hundredth Milli-
10-3
Thousandth Micro-
10-6
Millionth Nano-
10-9
Billionth
Pico-
10-12
Trillionth
1500 milli- = 500 x = 0.5 1000
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T5B01 How many milliamperes is 1.5 amperes?
A. 15 milliamperesB. 150 milliamperesC. 1,500 milliamperesD. 15,000 milliamperes
Metric Exponent English
Tera-
1012
Trillion Giga-
109
Billion Mega-
106
Million Kilo-
103
Thousand
Centi
10-2
Hundredth Milli-
10-3
Thousandth Micro-
10-6
Millionth Nano-
10-9
Billionth
Pico-
10-12
Trillionth
11500 milli- = 1500 x = 1.5 1000
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T5B08 How many microfarads are 1,000,000 picofarads?
A. 0.001 microfaradsB. 1 microfaradC. 1000 microfaradsD. 1,000,000,000 microfarads
Metric Exponent English
Tera-
1012
Trillion Giga-
109
Billion Mega-
106
Million Kilo-
103
Thousand
Centi
10-2
Hundredth Milli-
10-3
Thousandth Micro-
10-6
Millionth Nano-
10-9
Billionth
Pico-
10-12
Trillionth
1,000,000 pico- = 106 x 10–12 = 106–12 = 10–6 = 1 micro-
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T5B04 How many volts are equal to one microvolt?
A. One one-millionth of a voltB. One million voltsC. One thousand kilovoltsD. One one-thousandth of a volt
Metric Exponent English
Tera-
1012
Trillion Giga-
109
Billion Mega-
106
Million Kilo-
103
Thousand
Centi
10-2
Hundredth Milli-
10-3
Thousandth Micro-
10-6
Millionth Nano-
10-9
Billionth
Pico-
10-12
Trillionth
1 micro- = 10–6 = 1 millionth
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T7D08 Which of the following types of solder is best for radio and electronic use?
A. Acid-core solderB. Silver solderC. Rosin-core solderD. Aluminum solder
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T7D09 What is the characteristic appearance of a "cold" solder joint?
A. Dark black spotsB. A bright or shiny surfaceC. A grainy or dull surfaceD. A greenish tint
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T7D07 Which of the following measurements are commonly made using a multimeter?
A. SWR and RF powerB. Signal strength and noiseC. Impedance and reactanceD. Voltage and resistance
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T7D11 Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter?
A. Ensure that the applied voltages are correctB. Ensure that the circuit is not poweredC. Ensure that the circuit is groundedD. Ensure that the circuit is operating at the
correct frequency
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T7D06 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
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T7D10 What is probably happening when an ohmmeter, connected across a circuit, initially indicates a low resist-ance and then shows increasing resistance with time?
A. The ohmmeter is defectiveB. The circuit contains a large capacitorC. The circuit contains a large inductorD. The circuit is a relaxation oscillator