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- ***************************************************************************
- *** Note: A graphics sheet must be used with this question pool. ***
- *** It can be obtained from the ARRL/VEC (225 Main St, ***
- *** Newington CT 06111) for an SASE. ***
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-
-
- Continued from file TECH-1.NEW...
-
- SUBELEMENT T4 AMATEUR RADIO PRACTICES [4 exam questions - 4
- groups]
-
- T4A Electrical wiring, including switch location, dangerous
- voltages and currents.
-
- T4A01 (C)
- Where should the green wire in a three-wire AC line cord be
- connected in a power supply?
- A. To the fuse
- B. To the "hot" side of the power switch
- C. To the chassis
- D. To the white wire
-
- T4A02 (D)
- Where should the black (or red) wire in a three-wire AC line cord
- be connected in a power supply?
- A. To the white wire
- B. To the green wire
- C. To the chassis
- D. To the fuse
-
- T4A03 (B)
- Where should the white wire in a three-wire AC line cord be
- connected in a power supply?
- A. To the side of the power transformer's primary winding that
- has a fuse
- B. To the side of the power transformer's primary winding that
- does not have a fuse
- C. To the chassis
- D. To the black wire
-
- T4A04 (D)
- What document is used by almost every US city as the basis for
- electrical safety requirements for power wiring and antennas?
- A. The Code of Federal Regulations
- B. The Proceedings of the IEEE
- C. The ITU Radio Regulations
- D. The National Electrical Code
-
- T4A05 (C)
- What document would you use to see if you comply with standard
- electrical safety rules when building an amateur antenna?
- A. The Code of Federal Regulations
- B. The Proceedings of the IEEE
- C. The National Electrical Code
- D. The ITU Radio Regulations
-
- T4A06 (D)
- Where should fuses be connected on a mobile transceiver's DC
- power cable?
- A. Between the red and black wires
- B. In series with just the black wire
- C. In series with just the red wire
- D. In series with both the red and black wires
-
- T4A07 (B)
- Why is the retaining screw in one terminal of a wall outlet made
- of brass while the other one is silver colored?
- A. To prevent corrosion
- B. To indicate correct wiring polarity
- C. To better conduct current
- D. To reduce skin effect
-
- T4A08 (A)
- How much electrical current flowing through the human body is
- usually fatal?
- A. As little as 1/10 of an ampere
- B. Approximately 10 amperes
- C. More than 20 amperes
- D. Current flow through the human body is never fatal
-
- T4A09 (A)
- Which body organ can be fatally affected by a very small amount
- of electrical current?
- A. The heart
- B. The brain
- C. The liver
- D. The lungs
-
- T4A10 (A)
- How much electrical current flowing through the human body is
- usually painful?
- A. As little as 1/500 of an ampere
- B. Approximately 10 amperes
- C. More than 20 amperes
- D. Current flow through the human body is never painful
-
- T4A11 (A)
- What is the minimum voltage which is usually dangerous to humans?
- A. 30 volts
- B. 100 volts
- C. 1000 volts
- D. 2000 volts
-
- T4A12 (C)
- Where should the main power switch for a high-voltage power
- supply be located?
- A. Inside the cabinet, to kill the power if the cabinet is
- opened
- B. On the back side of the cabinet, out of sight
- C. Anywhere that can be seen and reached easily
- D. A high-voltage power supply should not be switch-operated
-
- T4A13 (B)
- What precaution should you take when leaning over a power
- amplifier?
- A. Take your shoes off
- B. Watch out for loose jewelry contacting high voltage
- C. Shield your face from the heat produced by the power supply
- D. Watch out for sharp edges which may snag your clothing
-
- T4A14 (C)
- What is an important safety rule concerning the main electrical
- box in your home?
- A. Make sure the door cannot be opened easily
- B. Make sure something is placed in front of the door so no one
- will be able to get to it easily
- C. Make sure others in your home know where it is and how to
- shut off the electricity
- D. Warn others in your home never to touch the switches, even in
- an emergency
-
- T4A15 (B)
- What should you do if you discover someone who is being burned by
- high voltage?
- A. Run from the area so you won't be burned too
- B. Turn off the power, call for emergency help and give CPR if
- needed
- C. Immediately drag the person away from the high voltage
- D. Wait for a few minutes to see if the person can get away from
- the high voltage on their own, then try to help
-
- T4B Meters, including volt, amp, multi, peak-reading, RF watt
- and placement, and ratings of fuses and switches.
-
- T4B01 (B)
- How is a voltmeter usually connected to a circuit under test?
- A. In series with the circuit
- B. In parallel with the circuit
- C. In quadrature with the circuit
- D. In phase with the circuit
-
- T4B02 (C)
- How can the range of a voltmeter be increased?
- A. By adding resistance in series with the circuit under test
- B. By adding resistance in parallel with the circuit under test
- C. By adding resistance in series with the meter, between the
- meter and the circuit under test
- D. By adding resistance in parallel with the meter, between the
- meter and the circuit under test
-
- T4B03 (A)
- What happens inside a voltmeter when you switch it from a lower
- to a higher voltage range?
- A. Resistance is added in series with the meter
- B. Resistance is added in parallel with the meter
- C. Resistance is reduced in series with the meter
- D. Resistance is reduced in parallel with the meter
-
- T4B04 (A)
- How is an ammeter usually connected to a circuit under test?
- A. In series with the circuit
- B. In parallel with the circuit
- C. In quadrature with the circuit
- D. In phase with the circuit
-
- T4B05 (D)
- How can the range of an ammeter be increased?
- A. By adding resistance in series with the circuit under test
- B. By adding resistance in parallel with the circuit under test
- C. By adding resistance in series with the meter
- D. By adding resistance in parallel with the meter
-
- T4B06 (D)
- What does a multimeter measure?
- A. SWR and power
- B. Resistance, capacitance and inductance
- C. Resistance and reactance
- D. Voltage, current and resistance
-
- T4B07 (A)
- Where should an RF wattmeter be connected for the most accurate
- readings of transmitter output power?
- A. At the transmitter output connector
- B. At the antenna feed point
- C. One-half wavelength from the transmitter output
- D. One-half wavelength from the antenna feed point
-
- T4B08 (B)
- At what line impedance do most RF wattmeters usually operate?
- A. 25 ohms
- B. 50 ohms
- C. 100 ohms
- D. 300 ohms
-
- T4B09 (A)
- What does a directional wattmeter measure?
- A. Forward and reflected power
- B. The directional pattern of an antenna
- C. The energy used by a transmitter
- D. Thermal heating in a load resistor
-
- T4B10 (B)
- If a directional RF wattmeter reads 90 watts forward power and 10
- watts reflected power, what is the actual transmitter output
- power?
- A. 10 watts
- B. 80 watts
- C. 90 watts
- D. 100 watts
-
- T4B11 (C)
- If a directional RF wattmeter reads 96 watts forward power and 4
- watts reflected power, what is the actual transmitter output
- power?
- A. 80 watts
- B. 88 watts
- C. 92 watts
- D. 100 watts
-
- T4C Marker generator, crystal calibrator, signal generators and
- impedance-match indicator.
-
- T4C01 (A)
- What is a marker generator?
- A. A high-stability oscillator that generates reference signals
- at exact frequency intervals
- B. A low-stability oscillator that "sweeps" through a range of
- frequencies
- C. A low-stability oscillator used to inject a signal into a
- circuit under test
- D. A high-stability oscillator which can produce a wide range of
- frequencies and amplitudes
-
- T4C02 (A)
- How is a marker generator used?
- A. To calibrate the tuning dial on a receiver
- B. To calibrate the volume control on a receiver
- C. To test the amplitude linearity of a transmitter
- D. To test the frequency deviation of a transmitter
-
- T4C03 (D)
- What device is used to inject a frequency calibration signal into
- a receiver?
- A. A calibrated voltmeter
- B. A calibrated oscilloscope
- C. A calibrated wavemeter
- D. A crystal calibrator
-
- T4C04 (B)
- What frequency standard may be used to calibrate the tuning dial
- of a receiver?
- A. A calibrated voltmeter
- B. Signals from WWV and WWVH
- C. A deviation meter
- D. A sweep generator
-
- T4C05 (C)
- How might you check the accuracy of your receiver's tuning dial?
- A. Tune to the frequency of a shortwave broadcasting station
- B. Tune to a popular amateur net frequency
- C. Tune to one of the frequencies of station WWV or WWVH
- D. Tune to another amateur station and ask what frequency the
- operator is using
-
- T4C06 (C)
- What device produces a stable, low-level signal that can be set
- to a desired frequency?
- A. A wavemeter
- B. A reflectometer
- C. A signal generator
- D. An oscilloscope
-
- T4C07 (B)
- What is an RF signal generator used for?
- A. Measuring RF signal amplitudes
- B. Aligning tuned circuits
- C. Adjusting transmitter impedance-matching networks
- D. Measuring transmission-line impedances
-
- T4C08 (D)
- What device can measure an impedance mismatch in your antenna
- system?
- A. A field-strength meter
- B. An ammeter
- C. A wavemeter
- D. A reflectometer
-
- T4C09 (A)
- Where should a reflectometer be connected for best accuracy when
- reading the impedance match between an antenna and its feed line?
- A. At the antenna feed point
- B. At the transmitter output connector
- C. At the midpoint of the feed line
- D. Anywhere along the feed line
-
- T4C10 (A)
- If you use a 3-30 MHz RF power meter for VHF, how accurate will
- its readings be?
- A. They will not be accurate
- B. They will be accurate enough to get by
- C. If it properly calibrates to full scale in the set position,
- they may be accurate
- D. They will be accurate providing the readings are multiplied
- by 4.5
-
- T4C11 (C)
- If you use a 3-30 MHz SWR meter for VHF, how accurate will its
- readings be?
- A. They will not be accurate
- B. They will be accurate enough to get by
- C. If it properly calibrates to full scale in the set position,
- they may be accurate
- D. They will be accurate providing the readings are multiplied
- by 4.5
-
- T4D Dummy antennas, S-meter, exposure of the human body to RF.
-
- T4D01 (D)
- What device should be connected to a transmitter's output when
- you are making transmitter adjustments?
- A. A multimeter
- B. A reflectometer
- C. A receiver
- D. A dummy antenna
-
- T4D02 (B)
- What is a dummy antenna?
- A. An nondirectional transmitting antenna
- B. A nonradiating load for a transmitter
- C. An antenna used as a reference for gain measurements
- D. A flexible antenna usually used on hand-held transceivers
-
- T4D03 (C)
- What is the main component of a dummy antenna?
- A. A wire-wound resistor
- B. An iron-core coil
- C. A noninductive resistor
- D. An air-core coil
-
- T4D04 (B)
- What device is used in place of an antenna during transmitter
- tests so that no signal is radiated?
- A. An antenna matcher
- B. A dummy antenna
- C. A low-pass filter
- D. A decoupling resistor
-
- T4D05 (A)
- Why would you use a dummy antenna?
- A. For off-the-air transmitter testing
- B. To reduce output power
- C. To give comparative signal reports
- D. To allow antenna tuning without causing interference
-
- T4D06 (A)
- What minimum rating should a dummy antenna have for use with a
- 100-watt single-sideband phone transmitter?
- A. 100 watts continuous
- B. 141 watts continuous
- C. 175 watts continuous
- D. 200 watts continuous
-
- T4D07 (D)
- Why might a dummy antenna get warm when in use?
- A. Because it stores electric current
- B. Because it stores radio waves
- C. Because it absorbs static electricity
- D. Because it changes RF energy into heat
-
- T4D08 (A)
- What is used to measure relative signal strength in a receiver?
- A. An S meter
- B. An RST meter
- C. A signal deviation meter
- D. An SSB meter
-
- T4D09 (B)
- How can exposure to a large amount of RF energy affect body
- tissue?
- A. It causes radiation poisoning
- B. It heats the tissue
- C. It paralyzes the tissue
- D. It produces genetic changes in the tissue
-
- T4D10 (A)
- Which body organ is the most likely to be damaged from the
- heating effects of RF radiation?
- A. Eyes
- B. Hands
- C. Heart
- D. Liver
-
- T4D11 (D)
- What organization has published safety guidelines for the maximum
- limits of RF energy near the human body?
- A. The Institute of Electrical and Electronics Engineers (IEEE)
- B. The Federal Communications Commission (FCC)
- C. The Environmental Protection Agency (EPA)
- D. The American National Standards Institute (ANSI)
-
- T4D12 (B)
- What is the purpose of the ANSI RF protection guide?
- A. It lists all RF frequency allocations for interference
- protection
- B. It gives RF exposure limits for the human body
- C. It sets transmitter power limits for interference protection
- D. It sets antenna height limits for aircraft protection
-
- T4D13 (D)
- According to the ANSI RF protection guide, what frequencies cause
- us the greatest risk from RF energy?
- A. 3 to 30 MHz
- B. 300 to 3000 MHz
- C. Above 1500 MHz
- D. 30 to 300 MHz
-
- T4D14 (D)
- Why is the limit of exposure to RF the lowest in the frequency
- range of 30 MHz to 300 MHz, according to the ANSI RF protection
- guide?
- A. There are more transmitters operating in this range
- B. There are fewer transmitters operating in this range
- C. Most transmissions in this range are for a longer time
- D. The human body absorbs RF energy the most in this range
-
- T4D15 (B)
- According to the ANSI RF protection guide, what is the maximum
- safe power output to the antenna of a hand-held VHF or UHF radio?
- A. 125 milliwatts
- B. 7 watts
- C. 10 watts
- D. 25 watts
-
- T4D16 (C)
- After you have opened a VHF power amplifier to make internal
- tuning adjustments, what should you do before you turn the
- amplifier on?
- A. Remove all amplifier shielding to ensure maximum cooling
- B. Make sure that the power interlock switch is bypassed so you
- can test the amplifier
- C. Be certain all amplifier shielding is fastened in place
- D. Be certain no antenna is attached so that you will not cause
- any interference
-
- SUBELEMENT T5 - ELECTRICAL PRINCIPLES [2 exam questions - 2
- groups]
-
- T5A Definition of resistance, inductance, and capacitance and
- unit of measurement, calculation of values in series and
- parallel.
-
- T5A01 (D)
- What does resistance do in an electric circuit?
- A. It stores energy in a magnetic field
- B. It stores energy in an electric field
- C. It provides electrons by a chemical reaction
- D. It opposes the flow of electrons
-
- T5A02 (D)
- What is the ability to store energy in a magnetic field called?
- A. Admittance
- B. Capacitance
- C. Resistance
- D. Inductance
-
- T5A03 (C)
- What is the basic unit of inductance?
- A. The coulomb
- B. The farad
- C. The henry
- D. The ohm
-
- T5A04 (C)
- What is a henry?
- A. The basic unit of admittance
- B. The basic unit of capacitance
- C. The basic unit of inductance
- D. The basic unit of resistance
-
- T5A05 (D)
- What is the ability to store energy in an electric field called?
- A. Inductance
- B. Resistance
- C. Tolerance
- D. Capacitance
-
- T5A06 (A)
- What is the basic unit of capacitance?
- A. The farad
- B. The ohm
- C. The volt
- D. The henry
-
- T5A07 (B)
- What is a farad?
- A. The basic unit of resistance
- B. The basic unit of capacitance
- C. The basic unit of inductance
- D. The basic unit of admittance
-
- T5A08 (B)
- If two equal-value inductors are connected in series, what is
- their total inductance?
- A. Half the value of one inductor
- B. Twice the value of one inductor
- C. The same as the value of either inductor
- D. The value of one inductor times the value of the other
-
- T5A09 (A)
- If two equal-value inductors are connected in parallel, what is
- their total inductance?
- A. Half the value of one inductor
- B. Twice the value of one inductor
- C. The same as the value of either inductor
- D. The value of one inductor times the value of the other
-
- T5A10 (C)
- If two equal-value capacitors are connected in series, what is
- their total capacitance?
- A. Twice the value of one capacitor
- B. The same as the value of either capacitor
- C. Half the value of either capacitor
- D. The value of one capacitor times the value of the other
-
- T5A11 (A)
- If two equal-value capacitors are connected in parallel, what is
- their total capacitance?
- A. Twice the value of one capacitor
- B. Half the value of one capacitor
- C. The same as the value of either capacitor
- D. The value of one capacitor times the value of the other
-
- T5B Ohm's Law.
-
- T5B01 (D)
- Ohm's Law describes the mathematical relationship between what
- three electrical quantities?
- A. Resistance, voltage and power
- B. Current, resistance and power
- C. Current, voltage and power
- D. Resistance, current and voltage
-
- T5B02 (C)
- How is the current in a DC circuit calculated when the voltage
- and resistance are known?
- A. I = R x E [current equals resistance multiplied by voltage]
- B. I = R / E [current equals resistance divided by voltage]
- C. I = E / R [current equals voltage divided by resistance]
- D. I = P / E [current equals power divided by voltage]
-
- T5B03 (B)
- How is the resistance in a DC circuit calculated when the voltage
- and current are known?
- A. R = I / E [resistance equals current divided by voltage]
- B. R = E / I [resistance equals voltage divided by current]
- C. R = I x E [resistance equals current multiplied by voltage]
- D. R = P / E [resistance equals power divided by voltage]
-
- T5B04 (C)
- How is the voltage in a DC circuit calculated when the current
- and resistance are known?
- A. E = I / R [voltage equals current divided by resistance]
- B. E = R / I [voltage equals resistance divided by current]
- C. E = I x R [voltage equals current multiplied by resistance]
- D. E = P / I [voltage equals power divided by current]
-
- T5B05 (D)
- If a 12-volt battery supplies 0.25 ampere to a circuit, what is
- the circuit's resistance?
- A. 0.25 ohm
- B. 3 ohm
- C. 12 ohms
- D. 48 ohms
-
- T5B06 (D)
- If a 12-volt battery supplies 0.15 ampere to a circuit, what is
- the circuit's resistance?
- A. 0.15 ohm
- B. 1.8 ohm
- C. 12 ohms
- D. 80 ohms
-
- T5B07 (B)
- If a 4800-ohm resistor is connected to 120 volts,
- how much current will flow through it?
- A. 4 A
- B. 25 mA
- C. 25 A
- D. 40 mA
-
- T5B08 (D)
- If a 48000-ohm resistor is connected to 120 volts,
- how much current will flow through it?
- A. 400 A
- B. 40 A
- C. 25 mA
- D. 2.5 mA
-
- T5B09 (A)
- If a 4800-ohm resistor is connected to 12 volts,
- how much current will flow through it?
- A. 2.5 mA
- B. 25 mA
- C. 40 A
- D. 400 A
-
- T5B10 (A)
- If a 48000-ohm resistor is connected to 12 volts,
- how much current will flow through it?
- A. 250 uA
- B. 250 mA
- C. 4000 mA
- D. 4000 A
-
- T5B11 (A)
- If you know the voltage and current supplied to a circuit, what
- formula would you use to calculate the circuit's resistance?
- A. Ohm's Law
- B. Tesla's Law
- C. Ampere's Law
- D. Kirchhoff's Law
-
- SUBELEMENT T6 - CIRCUIT COMPONENTS - [2 Exam Questions - 2
- groups]
-
- T6A Resistors, construction types, variable and fixed, color
- code, power ratings, schematic symbols.
-
- T6A01 (B)
- Which of the following are common resistor types?
- A. Plastic and porcelain
- B. Film and wire-wound
- C. Electrolytic and metal-film
- D. Iron core and brass core
-
- T6A02 (C)
- What does a variable resistor or potentiometer do?
- A. Its resistance changes when AC is applied to it
- B. It transforms a variable voltage into a constant voltage
- C. Its resistance changes when its slide or contact is moved
- D. Its resistance changes when it is heated
-
- T6A03 (B)
- How do you find a resistor's tolerance rating?
- A. By using a voltmeter
- B. By reading the resistor's color code
- C. By using Thevenin's theorem for resistors
- D. By reading its Baudot code
-
- T6A04 (A)
- What do the first three color bands on a resistor indicate?
- A. The value of the resistor in ohms
- B. The resistance tolerance in percent
- C. The power rating in watts
- D. The resistance material
-
- T6A05 (B)
- What does the fourth color band on a resistor indicate?
- A. The value of the resistor in ohms
- B. The resistance tolerance in percent
- C. The power rating in watts
- D. The resistance material
-
- T6A06 (A)
- Why do resistors sometimes get hot when in use?
- A. Some electrical energy passing through them is lost as heat
- B. Their reactance makes them heat up
- C. Hotter circuit components nearby heat them up
- D. They absorb magnetic energy which makes them hot
-
- T6A07 (C)
- Why would a large size resistor be used instead of a smaller one
- of the same resistance?
- A. For better response time
- B. For a higher current gain
- C. For greater power dissipation
- D. For less impedance in the circuit
-
- T6A08 (C)
- What are the possible values of a 100-ohm resistor with a 10%
- tolerance?
- A. 90 to 100 ohms
- B. 10 to 100 ohms
- C. 90 to 110 ohms
- D. 80 to 120 ohms
-
- T6A09 (B)
- How do you find a resistor's value?
- A. By using a voltmeter
- B. By using the resistor's color code
- C. By using Thevenin's theorem for resistors
- D. By using the Baudot code
-
- T6A10 (A)
- Which tolerance rating would a high-quality resistor have?
- A. 0.1%
- B. 5%
- C. 10%
- D. 20%
-
- T6A11 (D)
- Which tolerance rating would a low-quality resistor have?
- A. 0.1%
- B. 5%
- C. 10%
- D. 20%
-
- T6B Schematic symbols - inductors and capacitors, construction
- of variable and fixed, factors affecting inductance and
- capacitance, capacitor construction.
-
- T6B01 (D)
- What is an inductor core?
- A. The place where a coil is tapped for resonance
- B. A tight coil of wire used in a transformer
- C. Insulating material placed between the wires of a transformer
- D. The place inside an inductor where its magnetic field is
- concentrated
-
- T6B02 (C)
- What does an inductor do?
- A. It stores a charge electrostatically and opposes a change in
- voltage
- B. It stores a charge electrochemically and opposes a change in
- current
- C. It stores a charge electromagnetically and opposes a change
- in current
- D. It stores a charge electromechanically and opposes a change
- in voltage
-
- T6B03 (D)
- What determines the inductance of a coil?
- A. The core material, the core diameter, the length of the coil
- and whether the coil is mounted horizontally or vertically
- B. The core diameter, the number of turns of wire used to wind
- the coil and the type of metal used for the wire
- C. The core material, the number of turns used to wind the core
- and the frequency of the current through the coil
- D. The core material, the core diameter, the length of the coil
- and the number of turns of wire used to wind the coil
-
- T6B04 (A)
- As an iron core is inserted in a coil, what happens to the coil's
- inductance?
- A. It increases
- B. It decreases
- C. It stays the same
- D. It disappears
-
- T6B05 (A)
- What can happen if you tune a ferrite-core coil with a metal
- tool?
- A. The metal tool can change the coil's inductance and cause you
- to tune the coil incorrectly
- B. The metal tool can become magnetized so much that you might
- not be able to remove it from the coil
- C. The metal tool can pick up enough magnetic energy to become
- very hot
- D. The metal tool can pick up enough magnetic energy to become a
- shock hazard
-
- T6B06 (B)
- In Figure T6-1 which symbol represents an adjustable inductor?
- A. Symbol 1
- B. Symbol 2
- C. Symbol 3
- D. Symbol 4
-
- T6B07 (D)
- In Figure T6-1 which symbol represents an iron-core inductor?
- A. Symbol 1
- B. Symbol 2
- C. Symbol 3
- D. Symbol 4
-
- T6B08 (D)
- In Figure T6-1 which symbol represents an inductor wound over a
- toroidal core?
- A. Symbol 1
- B. Symbol 2
- C. Symbol 3
- D. Symbol 4
-
- T6B09 (A)
- In Figure T6-1 which symbol represents an electrolytic capacitor?
- A. Symbol 1
- B. Symbol 2
- C. Symbol 3
- D. Symbol 4
-
- T6B10 (C)
- In Figure T6-1 which symbol represents a variable capacitor?
- A. Symbol 1
- B. Symbol 2
- C. Symbol 3
- D. Symbol 4
-
- T6B11 (C)
- What describes a capacitor?
- A. Two or more layers of silicon material with an insulating
- material between them
- B. The wire used in the winding and the core material
- C. Two or more conductive plates with an insulating material
- between them
- D. Two or more insulating plates with a conductive material
- between them
-
- T6B12 (B)
- What does a capacitor do?
- A. It stores a charge electrochemically and opposes a change in
- current
- B. It stores a charge electrostatically and opposes a change in
- voltage
- C. It stores a charge electromagnetically and opposes a change
- in current
- D. It stores a charge electromechanically and opposes a change
- in voltage
-
- T6B13 (A)
- What determines the capacitance of a capacitor?
- A. The material between the plates, the area of one side of one
- plate, the number of plates and the spacing between the plates
- B. The material between the plates, the number of plates and the
- size of the wires connected to the plates
- C. The number of plates, the spacing between the plates and
- whether the dielectric material is N type or P type
- D. The material between the plates, the area of one plate, the
- number of plates and the material used for the protective coating
-
- T6B14 (B)
- As the plate area of a capacitor is increased, what happens to
- its capacitance?
- A. It decreases
- B. It increases
- C. It stays the same
- D. It disappears
-
- SUBELEMENT T7 - PRACTICAL CIRCUITS - [1 exam question - 1 group]
-
- T7A Practical circuits.
-
- T7A01 (C)
- Why do modern HF transmitters have a built-in low-pass filter in
- their RF output circuits?
- A. To reduce RF energy below a cutoff point
- B. To reduce low-frequency interference to other amateurs
- C. To reduce harmonic radiation
- D. To reduce fundamental radiation
-
- T7A02 (A)
- What circuit blocks RF energy above and below a certain limit?
- A. A band-pass filter
- B. A high-pass filter
- C. An input filter
- D. A low-pass filter
-
- T7A03 (A)
- What type of filter is used in the IF section of receivers to
- block energy outside a certain frequency range?
- A. A band-pass filter
- B. A high-pass filter
- C. An input filter
- D. A low-pass filter
-
- T7A04 (C)
- What circuit is found in all types of receivers?
- A. An audio filter
- B. A beat-frequency oscillator
- C. A detector
- D. An RF amplifier
-
- T7A05 (D)
- What circuit has a variable-frequency oscillator connected to a
- driver and a power amplifier?
- A. A packet-radio transmitter
- B. A crystal-controlled transmitter
- C. A single-sideband transmitter
- D. A VFO-controlled transmitter
-
- T7A06 (B)
- What circuit combines signals from an IF amplifier stage and a
- beat-frequency oscillator (BFO), to produce an audio signal?
- A. An AGC circuit
- B. A detector circuit
- C. A power supply circuit
- D. A VFO circuit
-
- T7A07 (D)
- What circuit uses a limiter and a frequency discriminator to
- produce an audio signal?
- A. A double-conversion receiver
- B. A variable-frequency oscillator
- C. A superheterodyne receiver
- D. An FM receiver
-
- T7A08 (D)
- What circuit is pictured in Figure T7-1 if block 1 is a variable-
- frequency oscillator?
- A. A packet-radio transmitter
- B. A crystal-controlled transmitter
- C. A single-sideband transmitter
- D. A VFO-controlled transmitter
-
- T7A09 (B)
- What is the unlabeled block in Figure T7-2?
- A. An AGC circuit
- B. A detector
- C. A power supply
- D. A VFO circuit
-
- T7A10 (D)
- What circuit is pictured in Figure T7-3?
- A. A double-conversion receiver
- B. A variable-frequency oscillator
- C. A superheterodyne receiver
- D. An FM receiver
-
- T7A11 (C)
- What is the unlabeled block in Figure T7-4?
- A. A band-pass filter
- B. A crystal oscillator
- C. A reactance modulator
- D. A rectifier modulator
-
- SUBELEMENT T8 - SIGNALS AND EMISSIONS [2 exam questions - 2
- groups]
-
- T8A Definition of modulation and emission types.
-
- T8A01 (B)
- What is the name for unmodulated carrier wave emissions?
- A. Phone
- B. Test
- C. CW
- D. RTTY
-
- T8A02 (C)
- What is the name for Morse code emissions produced by switching a
- transmitter's output on and off?
- A. Phone
- B. Test
- C. CW
- D. RTTY
-
- T8A03 (B)
- What is RTTY?
- A. Amplitude-keyed telegraphy
- B. Frequency-shift-keyed telegraphy
- C. Frequency-modulated telephony
- D. Phase-modulated telephony
-
- T8A04 (B)
- What is the name for packet-radio emissions?
- A. CW
- B. Data
- C. Phone
- D. RTTY
-
- T8A05 (D)
- How is tone-modulated Morse code produced?
- A. By feeding a microphone's audio signal into an FM transmitter
- B. By feeding an on/off keyed audio tone into a CW transmitter
- C. By on/off keying of a carrier
- D. By feeding an on/off keyed audio tone into a transmitter
-
- T8A06 (D)
- What is the name of the voice emission most used on VHF/UHF
- repeaters?
- A. Single-sideband phone
- B. Pulse-modulated phone
- C. Slow-scan phone
- D. Frequency-modulated phone
-
- T8A07 (A)
- What is the name of the voice emission most used on amateur HF
- bands?
- A. Single-sideband phone
- B. Pulse-modulated phone
- C. Slow-scan phone
- D. Frequency-modulated phone
-
- T8A08 (A)
- What is meant by the upper-sideband (USB)?
- A. The part of a single-sideband signal which is above the
- carrier frequency
- B. The part of a single-sideband signal which is below the
- carrier frequency
- C. Any frequency above 10 MHz
- D. The carrier frequency of a single-sideband signal
-
- T8A09 (D)
- What emissions are produced by a transmitter using a reactance
- modulator?
- A. CW
- B. Test
- C. Single-sideband, suppressed-carrier phone
- D. Phase-modulated phone
-
- T8A10 (C)
- What other emission does phase modulation most resemble?
- A. Amplitude modulation
- B. Pulse modulation
- C. Frequency modulation
- D. Single-sideband modulation
-
- T8A11 (B)
- What is the name for emissions produced by an on/off keyed audio
- tone?
- A. RTTY
- B. MCW
- C. CW
- D. Phone
-
- T8B RF carrier, modulation, bandwidth and deviation.
-
- T8B01 (A)
- What is another name for a constant-amplitude radio-frequency
- signal?
- A. An RF carrier
- B. An AF carrier
- C. A sideband carrier
- D. A subcarrier
-
- T8B02 (A)
- What is modulation?
- A. Varying a radio wave in some way to send information
- B. Receiving audio information from a signal
- C. Increasing the power of a transmitter
- D. Suppressing the carrier in a single-sideband transmitter
-
- T8B03 (A)
- What kind of emission would your FM transmitter produce if its
- microphone failed to work?
- A. An unmodulated carrier
- B. A phase-modulated carrier
- C. An amplitude-modulated carrier
- D. A frequency-modulated carrier
-
- T8B04 (B)
- How would you modulate a 2-meter FM transceiver to produce
- packet-radio emissions?
- A. Connect a terminal-node controller to interrupt the
- transceiver's carrier wave
- B. Connect a terminal-node controller to the transceiver's
- microphone input
- C. Connect a keyboard to the transceiver's microphone input
- D. Connect a DTMF key pad to the transceiver's microphone input
-
- T8B05 (C)
- Why is FM voice best for local VHF/UHF radio communications?
- A. The carrier is not detectable
- B. It is more resistant to distortion caused by reflected
- signals
- C. It has high-fidelity audio which can be understood even when
- the signal is somewhat weak
- D. Its RF carrier stays on frequency better than the AM modes
-
- T8B06 (D)
- Why do many radio receivers have several IF filters of different
- bandwidths that can be selected by the operator?
- A. Because some frequency bands are wider than others
- B. Because different bandwidths help increase the receiver
- sensitivity
- C. Because different bandwidths improve S-meter readings
- D. Because some emission types need a wider bandwidth than
- others to be received properly
-
- T8B07 (C)
- Which list of emission types is in order from the narrowest
- bandwidth to the widest bandwidth?
- A. RTTY, CW, SSB voice, FM voice
- B. CW, FM voice, RTTY, SSB voice
- C. CW, RTTY, SSB voice, FM voice
- D. CW, SSB voice, RTTY, FM voice
-
- T8B08 (D)
- What is the usual bandwidth of a single-sideband amateur signal?
- A. 1 kHz
- B. 2 kHz
- C. Between 3 and 6 kHz
- D. Between 2 and 3 kHz
-
- T8B09 (C)
- What is the usual bandwidth of a frequency-modulated amateur
- signal?
- A. Less than 5 kHz
- B. Between 5 and 10 kHz
- C. Between 10 and 20 kHz
- D. Greater than 20 kHz
-
- T8B10 (B)
- What is the result of overdeviation in an FM transmitter?
- A. Increased transmitter power
- B. Out-of-channel emissions
- C. Increased transmitter range
- D. Poor carrier suppression
-
- T8B11 (C)
- What causes splatter interference?
- A. Keying a transmitter too fast
- B. Signals from a transmitter's output circuit are being sent
- back to its input circuit
- C. Overmodulation of a transmitter
- D. The transmitting antenna is the wrong length
-
- SUBELEMENT T9 - ANTENNAS AND FEED LINES [3 exam questions - 3
- groups]
-
- T9A Parasitic beam and non-directional antennas.
-
- T9A01 (C)
- What is a directional antenna?
- A. An antenna which sends and receives radio energy equally well
- in all directions
- B. An antenna that cannot send and receive radio energy by
- skywave or skip propagation
- C. An antenna which sends and receives radio energy mainly in
- one direction
- D. An antenna which sends and receives radio energy equally well
- in two opposite directions
-
- T9A02 (A)
- How is a Yagi antenna constructed?
- A. Two or more straight, parallel elements are fixed in line
- with each other
- B. Two or more square or circular loops are fixed in line with
- each other
- C. Two or more square or circular loops are stacked inside each
- other
- D. A straight element is fixed in the center of three or more
- elements which angle toward the ground
-
- T9A03 (C)
- What type of beam antenna uses two or more straight elements
- arranged in line with each other?
- A. A delta loop antenna
- B. A quad antenna
- C. A Yagi antenna
- D. A Zepp antenna
-
- T9A04 (B)
- How many directly driven elements do most beam antennas have?
- A. None
- B. One
- C. Two
- D. Three
-
- T9A05 (A)
- What is a parasitic beam antenna?
- A. An antenna where some elements obtain their radio energy by
- induction or radiation from a driven element
- B. An antenna where wave traps are used to magnetically couple
- the elements
- C. An antenna where all elements are driven by direct connection
- to the feed line
- D. An antenna where the driven element obtains its radio energy
- by induction or radiation from director elements
-
- T9A06 (D)
- What are the parasitic elements of a Yagi antenna?
- A. The driven element and any reflectors
- B. The director and the driven element
- C. Only the reflectors (if any)
- D. Any directors or any reflectors
-
- T9A07 (B)
- What is a cubical quad antenna?
- A. Four straight, parallel elements in line with each other,
- each approximately 1/2-electrical wavelength long
- B. Two or more parallel four-sided wire loops, each
- approximately one-electrical wavelength long
- C. A vertical conductor 1/4-electrical wavelength high, fed at
- the bottom
- D. A center-fed wire 1/2-electrical wavelength long
-
- T9A08 (A)
- What is a delta loop antenna?
- A. A type of cubical quad antenna, except with triangular
- elements rather than square
- B. A large copper ring or wire loop, used in direction finding
- C. An antenna system made of three vertical antennas, arranged
- in a triangular shape
- D. An antenna made from several triangular coils of wire on an
- insulating form
-
- T9A09 (D)
- What type of non-directional antenna is easy to make at home and
- works well outdoors?
- A. A Yagi
- B. A delta loop
- C. A cubical quad
- D. A ground plane
-
- T9A10 (D)
- What type of antenna is made when a magnetic-base whip antenna is
- placed on the roof of a car?
- A. A Yagi
- B. A delta loop
- C. A cubical quad
- D. A ground plane
-
- T9A11 (A)
- If a magnetic-base whip antenna is placed on the roof of a car,
- in what direction does it send out radio energy?
- A. It goes out equally well in all horizontal directions
- B. Most of it goes in one direction
- C. Most of it goes equally in two opposite directions
- D. Most of it is aimed high into the air
-
- T9B Polarization, impedance matching and SWR, feed lines,
- balanced vs unbalanced (including baluns).
-
- T9B01 (B)
- What does horizontal wave polarization mean?
- A. The magnetic lines of force of a radio wave are parallel to
- the earth's surface
- B. The electric lines of force of a radio wave are parallel to
- the earth's surface
- C. The electric lines of force of a radio wave are perpendicular
- to the earth's surface
- D. The electric and magnetic lines of force of a radio wave are
- perpendicular to the earth's surface
-
- T9B02 (C)
- What does vertical wave polarization mean?
- A. The electric lines of force of a radio wave are parallel to
- the earth's surface
- B. The magnetic lines of force of a radio wave are perpendicular
- to the earth's surface
- C. The electric lines of force of a radio wave are perpendicular
- to the earth's surface
- D. The electric and magnetic lines of force of a radio wave are
- parallel to the earth's surface
-
- T9B03 (C)
- What electromagnetic-wave polarization does a Yagi antenna have
- when its elements are parallel to the earth's surface?
- A. Circular
- B. Helical
- C. Horizontal
- D. Vertical
-
- T9B04 (D)
- What electromagnetic-wave polarization does a half-wavelength
- antenna have when it is perpendicular to the earth's surface?
- A. Circular
- B. Horizontal
- C. Parabolical
- D. Vertical
-
- T9B05 (D)
- What electromagnetic-wave polarization does most man-made
- electrical noise have in the HF and VHF spectrum?
- A. Horizontal
- B. Left-hand circular
- C. Right-hand circular
- D. Vertical
-
- T9B06 (D)
- What does standing-wave ratio mean?
- A. The ratio of maximum to minimum inductances on a feed line
- B. The ratio of maximum to minimum resistances on a feed line
- C. The ratio of maximum to minimum impedances on a feed line
- D. The ratio of maximum to minimum voltages on a feed line
-
- T9B07 (A)
- What does forward power mean?
- A. The power traveling from the transmitter to the antenna
- B. The power radiated from the top of an antenna system
- C. The power produced during the positive half of an RF cycle
- D. The power used to drive a linear amplifier
-
- T9B08 (B)
- What does reflected power mean?
- A. The power radiated down to the ground from an antenna
- B. The power returned to a transmitter from an antenna
- C. The power produced during the negative half of an RF cycle
- D. The power returned to an antenna by buildings and trees
-
- T9B09 (C)
- What happens to radio energy when it is sent through a poor
- quality coaxial cable?
- A. It causes spurious emissions
- B. It is returned to the transmitter's chassis ground
- C. It is converted to heat in the cable
- D. It causes interference to other stations near the
- transmitting frequency
-
- T9B10 (C)
- What is an unbalanced line?
- A. Feed line with neither conductor connected to ground
- B. Feed line with both conductors connected to ground
- C. Feed line with one conductor connected to ground
- D. Feed line with both conductors connected to each other
-
- T9B11 (A)
- What device can be installed to feed a balanced antenna with an
- unbalanced feed line?
- A. A balun
- B. A loading coil
- C. A triaxial transformer
- D. A wavetrap
-
- T9C Line losses by line type, length and frequency, RF safety.
-
- T9C01 (B)
- What common connector usually joins RG-213 coaxial cable to an HF
- transceiver?
- A. An F-type cable connector
- B. A PL-259 connector
- C. A banana plug connector
- D. A binding post connector
-
- T9C02 (A)
- What common connector usually joins a hand-held transceiver to
- its antenna?
- A. A BNC connector
- B. A PL-259 connector
- C. An F-type cable connector
- D. A binding post connector
-
- T9C03 (B)
- Which of these common connectors has the lowest loss at UHF?
- A. An F-type cable connector
- B. A type-N connector
- C. A BNC connector
- D. A PL-259 connector
-
- T9C04 (A)
- If you install a 6-meter Yagi antenna on a tower 150 feet from
- your transmitter, which of the following feed lines is best?
- A. RG-213
- B. RG-58
- C. RG-59
- D. RG-174
-
- T9C05 (C)
- If you have a transmitter and an antenna which are 50 feet apart,
- but are connected by 200 feet of RG-58 coaxial cable, what should
- be done to reduce feed line loss?
- A. Cut off the excess cable so the feed line is an even number
- of wavelengths long
- B. Cut off the excess cable so the feed line is an odd number of
- wavelengths long
- C. Cut off the excess cable
- D. Roll the excess cable into a coil which is as small as
- possible
-
- T9C06 (B)
- As the length of a feed line is changed, what happens to signal
- loss?
- A. Signal loss is the same for any length of feed line
- B. Signal loss increases as length increases
- C. Signal loss decreases as length increases
- D. Signal loss is the least when the length is the same as the
- signal's wavelength
-
- T9C07 (B)
- As the frequency of a signal is changed, what happens to signal
- loss in a feed line?
- A. Signal loss is the same for any frequency
- B. Signal loss increases with increasing frequency
- C. Signal loss increases with decreasing frequency
- D. Signal loss is the least when the signal's wavelength is the
- same as the feed line's length
-
- T9C08 (D)
- If your antenna feed line gets hot when you are transmitting,
- what might this mean?
- A. You should transmit using less power
- B. The conductors in the feed line are not insulated very well
- C. The feed line is too long
- D. The SWR may be too high, or the feed line loss may be high
-
- T9C09 (D)
- Why should you make sure that no one can touch an open-wire feed
- line while you are transmitting with it?
- A. Because contact might cause a short circuit and damage the
- transmitter
- B. Because contact might break the feed line
- C. Because contact might cause spurious emissions
- D. Because high-voltage radio energy might burn the person
-
- T9C10 (C)
- For RF safety, what is the best thing to do with your
- transmitting antennas?
- A. Use vertical polarization
- B. Use horizontal polarization
- C. Mount the antennas where no one can come near them
- D. Mount the antenna close to the ground
-
- T9C11 (A)
- Why should you regularly clean, tighten and re-solder all antenna
- connectors?
- A. To help keep their resistance at a minimum
- B. To keep them looking nice
- C. To keep them from getting stuck in place
- D. To increase their capacitance
-
-
-