* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Amateur Radio Technician Class Element 2 Course Presentation
Electronic engineering wikipedia , lookup
Power engineering wikipedia , lookup
Spark-gap transmitter wikipedia , lookup
Voltage optimisation wikipedia , lookup
History of electric power transmission wikipedia , lookup
Stray voltage wikipedia , lookup
Ground (electricity) wikipedia , lookup
Printed circuit board wikipedia , lookup
Electrical substation wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Earthing system wikipedia , lookup
Potentiometer wikipedia , lookup
Alternating current wikipedia , lookup
Fault tolerance wikipedia , lookup
Current source wikipedia , lookup
Two-port network wikipedia , lookup
Mains electricity wikipedia , lookup
Rectiverter wikipedia , lookup
Surge protector wikipedia , lookup
Electrical ballast wikipedia , lookup
Opto-isolator wikipedia , lookup
Power MOSFET wikipedia , lookup
Regenerative circuit wikipedia , lookup
Switched-mode power supply wikipedia , lookup
History of the transistor wikipedia , lookup
RLC circuit wikipedia , lookup
Current mirror wikipedia , lookup
Network analysis (electrical circuits) wikipedia , lookup
Technician Licensing Class Picture This! Page 141 to 150 Amateur Radio Technician Class Element 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 2 Amateur Radio Technician Class Element 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! 3 Element 2 Technician Class Question Pool Picture This! Valid July 1, 2010 Through June 30, 2014 What is the name for standardized representations of components in an electrical wiring diagram? T6C01 A. Electrical depictions B. Grey sketch C. Schematic symbols D. Component callouts What do the symbols on an electrical circuit schematic diagram represent? T6C12 A. Electrical components B. Logic states CAPACITOR C. Digital codes RESISTOR TRANSISTOR D. Traffic DIODE nodes LED BATTERY ANTENNA Which of the following is accurately represented in electrical circuit schematic diagrams? T6C13 A. B. C. D. Wire lengths Physical appearance of components The way components are interconnected All of these choices 20m CW Transmitt er by ON6M U T6C10 A. B. C. D. What is component 3 in Figure T3? Connector Meter Variable capacitor Variable inductor “coil” T6C11 A. B. C. D. What is component 4 in Figure T3? Antenna Transmitter Dummy load Ground T6D08 Which of the following is used together with an inductor to make a tuned circuit? A. B. C. D. Resistor Zener diode Potentiometer Capacitor Tank Circuit Schematic Variable Capacitors Inductor Tank Circuit or Tuned Circuit T6C02 A. B. C. D. What is component 1 in Figure T1? Resistor Transistor Battery connector Resistors “slow down” the current. See that effect in the symbol? T6C03 A. B. C. D. What is component 2 in Figure T1? Resistor Transistor Indicator lamp Connector Transistors have Three wires. 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 T6C04 A. B. C. D. What is component 3 in Figure T1? Resistor Transistor Lamp Ground symbol T6C05 A. B. C. D. What is component 4 in Figure T1? Resistor Transistor Battery Ground symbol T6D03 A. B. C. D. What type of switch is represented by item 3 in Figure T2? Single-pole single-throw Single-pole double-throw Double-pole single-throw Double-pole double-throw T6C09 A. B. C. D. What is component 4 in Figure T2? Variable inductor Double-pole switch Potentiometer Transformer T6C06 A. B. C. D. What is component 6 in Figure T2? Resistor Capacitor Regulator IC Transistor T6C07 A. B. C. D. What is component 8 in Figure T2? Resistor Inductor Regulator IC Light emitting diode L E D T6C08 A. B. C. D. What is component 9 in Figure T2? Variable Variable Variable Variable capacitor inductor resistor transformer Which of the following can be used to display signal strength on a numeric scale? T6D04 A. B. C. D. Potentiometer Transistor Meter Relay T6D02 A. B. C. D. What best describes a relay? A switch controlled by an electromagnet A current controlled amplifier An optical sensor A pass transistor What is the approximate amount of change, measured in decibels (dB), of a power increase from 5 watts to 10 watts? T5B09 A. B. C. D. 2 dB 3 dB 5 dB 10 dB dB Change 2x 3 dB 4x 6 dB 8x 9 dB 10x 10 dB 100x 20 dB 1000x 30 dB 40 dB 10,000x • 3 dB gain = a factor of 2. • “twice as much” is +3 db • “half as much” is –3 db What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts? T5B10 A. B. C. D. 1 3 6 9 dB dB dB dB ¼ ½ =¼ From 12 to 3 is ½ × –3 db + –3 db = –6 db dB Change 2x 3 dB 4x 6 dB 8x 9 dB 10x 10 dB 100x 20 dB 1000x 30 dB 40 dB 10,000x • 3 dB gain = a factor of 2. • “twice as much” is +3 db • “half as much” is – 3 db What is the approximate amount of change, measured in decibels (dB), of a power increase from 20 watts to 200 watts? T5B11 A. B. C. D. 10 12 18 28 dB Change 2x 3 dB 4x 6 dB 8x 9 dB 10x 10 dB 100x 20 dB 1000x 30 dB 40 dB 10,000x dB dB dB dB From 20 to 200 is 10x 10 db • • • • 3 dB gain = a factor of 2. “twice as much” is +3 db “half as much” is –3 db “10 times” is +10 db What type of circuit controls the amount of voltage from a power supply? T6D05 A. B. C. D. Regulator Oscillator Filter Phase inverter Voltage Regulator What component is commonly used to change 120V AC house current to a lower AC voltage for other uses? T6D06 A. B. C. D. Variable capacitor Transformer Transistor Diode Voltage Transformer T6D09 What is the name of a device that combines several semiconductors and other components into one package? A. B. C. D. Transducer Multi-pole relay Integrated circuit Transformer I C Integrated Circuit Chips T6B07 A. B. C. D. What does the abbreviation "LED" stand for? Low Emission Diode Light Emitting Diode Liquid Emission Detector Long Echo Delay T6D07 A. B. C. D. Which of the following is commonly used as a visual indicator? LED FET Zener diode Bipolar transistor T5B02 What is another way to specify a radio signal frequency of 1,500,000 hertz? A. B. C. D. 1500 kHz 1500 MHz 15 GHz 15 kHz 1500 kilo = 1500 x 1000 = 1,500,000 Metric Exponent English TeraGigaMegaKilo- 1012 109 106 103 Trillion Billion Million Thousand Centi MilliMicroNanoPico- 10-2 10-3 10-6 10-9 10-12 Hundredth Thousandth Millionth Billionth Trillionth T5B03 A. B. C. D. How many volts are equal to one kilovolt? One One One One one-thousandth of a volt hundred volts thousand volts 1 kilo = 1 x 1000 = 1,000 million volts Metric Exponent English TeraGigaMegaKilo- 1012 109 106 103 Trillion Billion Million Thousand Centi MilliMicroNanoPico- 10-2 10-3 10-6 10-9 10-12 Hundredth Thousandth Millionth Billionth Trillionth If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show? T5B06 A. B. C. D. 0.003 amperes 0.3 amperes 1 3 amperes 3000 milli- = 3000 x = 3 1000 3,000,000 amperes Metric Exponent English TeraGigaMegaKilo- 1012 109 106 103 Trillion Billion Million Thousand Centi MilliMicroNanoPico- 10-2 10-3 10-6 10-9 10-12 Hundredth Thousandth Millionth Billionth Trillionth T5B05 A. B. C. D. Which of the following is equivalent to 500 milliwatts? 0.02 watts 0.5 watts 5 watts 50 watts 1 1000 500 milli- = 500 x = 0.5 Metric Exponent English TeraGigaMegaKilo- 1012 109 106 103 Trillion Billion Million Thousand Centi MilliMicroNanoPico- 10-2 10-3 10-6 10-9 10-12 Hundredth Thousandth Millionth Billionth Trillionth T5B01 A. B. C. D. How many milliamperes is 1.5 amperes? 15 milliamperes 150 milliamperes 1,500 milliamperes 15,000 milliamperes Metric Exponent English TeraGigaMegaKilo- 1012 109 106 103 Trillion Billion Million Thousand Centi MilliMicroNanoPico- 10-2 10-3 10-6 10-9 10-12 Hundredth Thousandth Millionth Billionth Trillionth 1 1000 1500 milli- = 1500 x = 1.5 T5B08 A. B. C. D. How many microfarads are 1,000,000 picofarads? Metric 0.001 microfarads 1 microfarad 1000 microfarads 1,000,000,000 microfarads Exponent English TeraGigaMegaKilo- 1012 109 106 103 Trillion Billion Million Thousand Centi MilliMicroNanoPico- 10-2 10-3 10-6 10-9 10-12 Hundredth Thousandth Millionth Billionth Trillionth 1,000,000 pico- = 106 x 10–12 = 106–12 = 10–6 = 1 micro- T5B04 A. B. C. D. How many volts are equal to one microvolt? One One One One one-millionth of a volt million volts thousand kilovolts one-thousandth of a volt Metric 1 micro- = 10–6 = 1 millionth Exponent English TeraGigaMegaKilo- 1012 109 106 103 Trillion Billion Million Thousand Centi MilliMicroNanoPico- 10-2 10-3 10-6 10-9 10-12 Hundredth Thousandth Millionth Billionth Trillionth Which of the following types of solder is best for radio and electronic use? T7D08 A. B. C. D. Acid-core solder Silver solder Rosin-core solder Aluminum solder What is the characteristic appearance of a "cold" solder joint? T7D09 A. B. C. D. Dark black spots A bright or shiny surface A grainy or dull surface A greenish tint Which of the following measurements are commonly made using a multimeter? T7D07 A. B. C. D. SWR and RF power Signal strength and noise Impedance and reactance Voltage and resistance Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter? T7D11 A. B. C. D. Ensure Ensure Ensure Ensure correct that the applied voltages are correct that the circuit is not powered that the circuit is grounded that the circuit is operating at the frequency 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 What is probably happening when an ohmmeter, connected across a circuit, initially indicates a low resistance and then shows increasing resistance with time? T7D10 A. B. C. D. The The The The ohmmeter is defective circuit contains a large capacitor circuit contains a large inductor circuit is a relaxation oscillator