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1991-11-22
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19KB
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504 lines
252E-8.2 A 3-10 Heat is a form of energy
What is converted to heat and light in an electric light bulb?
A. Electrical energy
B. Electrical voltage
C. Electrical power
D. Electrical current
*
253E-9-1.1 C 3-10 Power, P = I*E
What term is used to describe the rate of energy consumption?
A. Energy
B. Current
C. Power
D. Voltage
*
254E-9-1.2 C 3-10 Power is the term used to describe|the rate of energy consumption and|watts are the units of measurement
You have two lamps with different wattage light bulbs in them.
How can you determine which bulb uses electrical energy faster?
A. The bulb that operates from the higher voltage will consume
energy faster
B. The physically larger bulb will consume energy faster
C. The bulb with the higher wattage rating will consume energy
faster
D. The bulb with the lower wattage rating will consume energy
faster
*
255E-9-2.1 B 3-10 Power is the term used to describe|the rate of energy consumption and|watt is the basic unit
What is the basic unit of electrical power?
A. Ohm
B. Watt
C. Volt
D. Ampere
*
256E-10.1 C 3-9 Open circuit means there is no |connection and hence no current
What is the term for an electrical circuit in which there can
be no current?
A. A closed circuit
B. A short circuit
C. An open circuit
D. A hyper circuit
*
257E-11.1 D 3-9 Short circuit means that the current |is taking a "short" cut and excessive|current is the result
What is the term for a failure in an electrical circuit that
causes excessively high current?
A. An open circuit
B. A dead circuit
C. A closed circuit
D. A short circuit
*
258E-12-1.1B 3-12 DC is the common abbreviation|for direct current
What is the term used to describe a current that flows only
in one direction?
A. Alternating current
B. Direct current
C. Periodic current
D. Pulsating current
*
259E-12-2.1A 3-12 AC is the common abbreviation|for alternating current
What is the term used to describe a current that flows first in
one direction, then in the opposite direction, over and over?
A. Alternating current
B. Direct current
C. Negative current
D. Positive current
*
260E-12-3.1D 3-12 The term used for the number of|cycles per second is frequency |and the unit is Hertz
What is the term for the number of complete cycles of an
alternating waveform that occur in one second?
A. Pulse repetition rate
B. Hertz
C. Frequency per wavelength
D. Frequency
*
261E-12-3.2A 3-12 The term used for the number of|cycles per second is frequency
A certain ac signal makes 2000 complete cycles in one second.
What property of the signal does this number describe?
A. The frequency of the signal
B. The pulse repetition rate of the signal
C. The wavelength of the signal
D. The hertz per second of the signal
*
262E-12-3.3A 3-12 Hz is the common abbreviation|for Hertz, the term used now |for cycles per second
What is the basic unit of frequency?
A. The hertz
B. The cycle
C. The kilohertz
D. The megahertz
*
263E-12-4.1B 3-12 1 kHz is used as an an audio test tone
What range of frequencies are usually called audio
frequencies?
A. 0 to 20 Hz
B. 20 to 20,000 Hz
C. 200 to 200,000 Hz
D. 10,000 to 30,000 Hz
*
264E-12-4.2A 3-12 725 Hz is in the normal hearing|range and is an audio frequency
A signal at 725 Hz is in what frequency range?
A. Audio frequency
B. Intermediate frequency
C. Microwave frequency
D. Radio frequency
*
265E-12-4.3B 3-12 The ears respond to sounds in|the range of 20 to 20,000 Hz
Why do we call signals in the range 20 Hz to 20,000 Hz audio
frequencies?
A. Because the human ear rejects signals in this frequency range
B. Because the human ear responds to sounds in this frequency
range
C. Because frequencies in this range are too low for a radio to
detect
D. Because a radio converts signals in this range directly to
sounds the human ear responds to
*
266E-12-5.1C 3-12 20 kHz
Signals above what frequency are usually called radio-frequency
signals?
A. 20 Hz
B. 2000 Hz
C. 20,000 Hz
D. 1,000,000 Hz
*
267E-12-5.2B 3-12 RF is the common abbreviation|for radio frequency
A signal at 7125 kHz is in what frequency range?
A. Audio frequency
B. Radio frequency
C. Hyper-frequency
D. Super-high frequency
*
268E-13.1 C 3-12 Wavelength (Usually in meters)
What is the term for the distance an ac signal travels during
one complete cycle?
A. Wave velocity
B. Velocity factor
C. Wavelength
D. Wavelength per meter
*
269E-13.2 D 3-13 Wavelength
In the time it takes a certain radio signal to pass your
antenna, the leading edge of the wave travels 12 meters.
What property of the signal does this number refer to?
A. The signal frequency
B. The wave velocity
C. The velocity factor
D. The signal wavelength
*
270F-1.1 B 4-2 Not D, that is an inductor
What is the symbol used on schematic diagrams to represent
a resistor?
|
A. B.
───│── ──/\/\/\/\/\/\──
C. ┌─┐ D.
───┤ ├─── ┌─┬─┬─┬─┬─┬─┬─┐
└─┘ │ │ │ │ │ │ │ │
*
271F-1.2 C 4-2 Not A, that is an LED
What is the symbol used on schematic diagrams to represent
a variable resistor or potentiometer?
|
A. ─┐ ─┐ B. ─┐
/ / ┌─┬─┬─┬─┬─/─┬─┐
──│─── │ │ │ │ / │ │ │
/
C. ┌─ D. ─┐
\ │ │/
──/\/\/\/\/\/\─ ───┤/├───
\ /│ │
*
272F-1.3 C 4-2 A (1) is a switch
In diagram 2F-1, which component is a resistor?
A. 1
B. 2
C. 3
D. 4
| / 2
/ ┌┬───┬┐ 3
┌──O O────┤│ │├────/\/\/\/\/\/\───┐
│ 1 └┴───┴┘ │
│ │
│ 4 │
│ │ │
└────────────────┤ ├───────────────────┘
── │ ─┼─ Figure 2F-1
*
273F-2.1 A 4-2 Not B, that is a Zener diode
What is the symbol used on schematic diagrams to represent
a single-throw switch?
|
/
A. / B. ─┐
O O ──│───
└─
O ┌───
C. / D.
/ O────
O O
└───
*
274F-2.2 A 4-2 Try A
What is the symbol used on schematic diagrams to represent
a single-pole, double-throw switch?
|
O
/
A. / B. O────
O O
└───
C. / D. ┬
/ ─┴────O──
O O ───
*
275F-2.3 B 4-2 Try B
What is the symbol used on schematic diagrams to represent
a double-pole, double-throw switch?
|
O
/ O O──┬──O
A. / B. |
O O O O──┴──O
┌───
C. O──── D.
O────
└───
└───
*
276F-2.4 D 4-2 Not B, it is a tube drawing
What is the symbol used on schematic diagrams to represent
a single-pole, 5-position switch?
| │
───┴───
O O O O O ─ ─ ─ ─
A. ├ ─ ┼ ─ ┼ ─ ┼ ─ ┤ B. ─ ─ ─ ─
O O O O O ─ ─ ─ ─
┌─────┐
│
O O
C. O │ O D. O O
\ /
O────O────O O O────O
*
277F-2.5 A 4-2 C (3) is a resistor
In diagram 2F-2, which component is a switch?
A. 1
B. 2
C. 3
D. 4
| / 2
/ ┌┬───┬┐ 3
┌──O O────┤│ │├────/\/\/\/\/\/\───┐
│ 1 └┴───┴┘ │
│ │
│ 4 │
│ │ │
└────────────────┤ ├───────────────────┘
── │ ─┼─ Figure 2F-2
*
278F-3.1 C 4-3 Not A
What is the symbol used on schematic diagrams to represent
a fuse?
┌─┐
┌─┐ ││ ││
A. ──┤ ├── B. ───┤│ │├───
└─┘ ││ ││
└─┘
┌┬───┬┐ │
C. ─┤│ │├─ D. ┌──┴──┐
└┴───┴┘ └──┬──┘
│
*
279F-4.1 C 4-4 Not A, the polarity is reversed
What is the symbol used on schematic diagrams to represent
a single-cell battery?
── │ ─┼─ ── ┌─┐ ─┼─
A. ───┤├─── B. ──┤ ├──
│ └─┘
─┼─ │ ── ─┼─ ┌┬───┬┐ ──
C. ───┤├─── D. ─┤│ │├─
│ └┴───┴┘
*
280F-4.2 B 4-4 Not D, the polarity is reversed
What is the symbol used on schematic diagrams to represent
a multi-cell battery?
── ┌─┐ ┌─┐ ┌─┐ ─┼─ ─┼─ │ │ ──
A. ──┤ ├──┤ ├──┤ ├── B. ───┤││├───
└─┘ └─┘ └─┘ │ │
─┼─ │ | | | ┌ ── │ │ ─┼─
C. ───┤ | | | │ ── D. ───┤││├───
│ | | | └───── │ │
*
281F-5.1 D 4-4 B is a chassis ground connection
What is the symbol normally used to represent an earth-ground
connection on schematic diagrams?
│ │
A. /│\ B. __│___
/ │ \ / / /
│
C. _│_│_ D. ───┴───
/_____\ ─────
───
*
282F-5.2 B 4-4 C is an earth ground connection
What is the symbol normally used to represent an chassis-ground
connection on schematic diagrams?
│ │
A. /│\ B. __│___
/ │ \ / / /
│
C. ───┴─── D. _│_│
───── /_____\
───
*
283F-5.3 A 4-4 B (2) is an NPN transistor
In diagram 2F-5, which symbol represents a chassis ground connection?
|
A. 1
B. 2 Figure 2F-5
C. 3
D. 4 O
│ ┌──────────────┐
/ │ /
│ / │ │ /
┌──/\/\/\/\/\/\────┤\ │ O────┤\
│ │ > │ │ <
│ 2 \ │ 3 \
│ └──┘ │ 4
│ 1 ───┴───
__│___ ─────
/ / / ───
*
284F-5.4 D 4-4 C (3) is an PNP transistor
In diagram 2F-5, which symbol represents an earth ground connection?
|
A. 1
B. 2 Figure 2F-5
C. 3
D. 4 O
│ ┌──────────────┐
/ │ /
│ / │ │ /
┌──/\/\/\/\/\/\────┤\ │ O────┤\
│ │ > │ │ <
│ 2 \ │ 3 \
│ └──┘ │ 4
│ 1 ───┴───
__│___ ─────
/ / / ───
*
285F-6.1 D 4-4 Not B, that is a speaker|drawing turned sideways
What is the symbol normally used to represent an antenna
on schematic diagrams?
|
─── ___________
───── \ /
A. ───┬─── B. \─────/
│ └─┬─┬─┘
/__/__/ \ │ /
C. │ D. \│/
│ │
*
286F-7.1 C 4-5 Bipolar transistors have a Base,|an Emitter and a Collector.|Not-Pointing-iN
What is the symbol used to represent an NPN bipolar transistor
on schematic diagrams?
|
/──── C
│ / E \ ├────── B2
A. B ────┤\ B. > │
│ < \│
\──── E ├────── B1
/──── C
C. │ / D. E \ ├────── B2
B ────┤\ < │
│ > \│
\──── E ├────── B1
*
287F-7.2 A 4-5 In a PNP the arrows points in|Pointing-iN-Part
What is the symbol used to represent a PNP bipolar transistor
on schematic diagrams?
|
/──── C
│ / E \ ├────── B2
A. B ────┤\ B. > │
│ < \│
\──── E ├────── B1
/──── C
C. │ / D. E \ ├────── B2
B ────┤\ < │
│ > \│
\──── E ├────── B1
*
288F-7.3 C 4-5 Pointing-iN-Part
In diagram 2F-7, which symbol represents a PNP bipolar transistor?
|
A. 1
B. 2 Figure 2F-7
C. 3
D. 4 O
│ ┌──────────────┐
/ │ /
│ / │ │ /
┌──/\/\/\/\/\/\────┤\ │ O────┤\
│ │ > │ │ <
│ 2 \ │ 3 \
│ └──┘ │ 4
│ 1 ───┴───
__│___ ─────
/ / / ───
*
289F-7.4 B 4-5 Not-Pointing-iN
In diagram 2F-7, which symbol represents a NPN bipolar transistor?
|
A. 1
B. 2 Figure 2F-7
C. 3
D. 4 O
│ ┌──────────────┐
/ │ /
│ / │ │ /
┌──/\/\/\/\/\/\────┤\ │ O────┤\
│ │ > │ │ <
│ 2 \ │ 3 \
│ └──┘ │ 4
│ 1 ───┴───
__│___ ─────
/ / / ───
*
290F-8.1 A 4-6 Tri means three, a triode has 3 |elements and the grid is usually|drawn with a single dotted line
What is the symbol used to represent a triode vacuum tube on
schematic diagrams?
| │ PLATE
│ PLATE ───┴───
A. ───┴─── B. ─ ─ ─ ─ ┐
GRID ─ ─ ─ ─ ─ ─ ─ ─ │GRID
┌─────┐ ─ ─ ─ ─ ┘
│ /\ CATHODE ┌─────┐
│ ││ CATHODE │ /\
PLATE PLATE
C. │ D. │
O GRID ▀▀▀
■ GRID ────▄
O ▄▄▄▄▄
CATHODE │ CATHODE │
*
291G-1-1.1 B 5-2 An antenna switch used to select|the antenna or the dummy load
What is the unlabeled block (?) in this diagram?
ANTENNA
\│/
FEED LINE─│
┌─────────────┐ ┌────┴────┐ ┌───────┐
│ TRANSMITTER ├─────┤ ? ├─────┤ DUMMY │
│ │ │ │ │ LOAD │
└──────┬──────┘ └─────────┘ └───────┘
│
┌────┴────┐ A. A terminal-node controller
│ POWER │ B. An antenna switch
│ SUPPLY │ C. A telegraph key
└─────────┘ D. A TR switch
*
292G-1-1.2 C 5-2 A TR switch is a Transmit-Receive |switch used to connect the receiver|or transmitter to the antenna
What is the unlabeled block (?) in this diagram?
ANTENNA
\│/
FEED LINE─│
┌─────────────┐ ┌───┴────┐ ┌──────────┐
│ ? ├─────┤ TR ├─────┤ RECEIVER │
│ │ │ SWITCH │ │ │
└──────┬──────┘ └────────┘ └──────────┘
│
┌────┴────┐ A. A microphone
│ POWER │ B. A receiver
│ SUPPLY │ C. A transmitter
└─────────┘ D. An SWR meter
*
293G-1-1.3 D 5-2 A TR switch is a Transmit-Receive |switch used to connect the receiver|or transmitter to the antenna
What is the unlabeled block (?) in this diagram?
ANTENNA
\│/
FEED LINE─│
┌─────────────┐ ┌────┴────┐ ┌──────────┐
│ TRANSMITTER ├─────┤ TR ├─────┤ ? │
│ │ │ SWITCH │ │ │
└──────┬──────┘ └─────────┘ └──────────┘
│
┌────┴────┐ A. A key click filter
│ KEY │ B. An antenna tuner
│ │ C. A power supply
└─────────┘ D. A receiver
*