Transcript Amateur Radio Technician Class Element 2 Course Presentation

Technician Licensing Class
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Amateur Radio Technician Class
Element 2 Course Presentation
 ELEMENT 2 SUB-ELEMENTS (Groupings)
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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