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Ham Radio Technician > Technician Test T6 and T7 questions > Flashcards

Technician Test T6 and T7 questions Flashcards

1
Q

What electrical component opposes the flow of current in a DC circuit? T6A01

A

Resistor
3-8

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2
Q

What type of component is often used as an adjustable volume control? T6A02

A

Potentiometer
3-8

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3
Q

What electrical parameter is controlled by a potentiometer? T6A03

A

Resistance
3-8

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4
Q

What electrical component stores energy in an electric field? T6A04

A

Capacitor
3-8

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5
Q

What type of electrical component consists of conductive surfaces separated by an insulator? T6A05

A

Capacitor
3-8

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6
Q

What type of electrical component stores energy in a magnetic field? T6A06

A

Inductor
3-8

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7
Q

What electrical component is typically constructed as a coil of wire? T6A07

A

Inductor
3-8

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8
Q

What is the function of an SPDT switch? T6A08

A

Single Pole Double Throw
A single circuit is switched between one of two other circuits
3-13

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9
Q

What electrical component is used to protect other circuit components from current overloads? T6A09

A

Fuse
3-12

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10
Q

Which of the following battery chemistries is rechargeable? T6A10

A

All these choices are correct
-Nickel-metal hydride
-Lithium-ion
-Lead-acid
5-17

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11
Q

Which of the following battery chemistries is not rechargeable? T6A11

A

Carbon-zinc
5-17

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12
Q

What type of switch is represented by component 3 in figure T-2?

A

Single-pole single-throw
3-13

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13
Q

Which is true about forward voltage drop in a diode? T6B01

A

It is lower in some diode types than in others
3-10

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14
Q

What electronic component allows current to flow in only one direction? T6B02

A

Diode
3-10

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15
Q

Which of these components can be used as an electronic switch? T6B03

A

Transistor
3-10

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16
Q

Which of the following components can consist of three regions of semiconductor material? T6B04

A

Transistor
3-10

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17
Q

What type of transistor has a gate, drain, and source? T6B05

A

Field-effect
3-10

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18
Q

How is the cathode lead of a semiconductor diode often marked on the package? T6B06

A

With a stripe
3-10

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19
Q

What causes a light-emitting diode (LED) to emit light? T6B07

A

Forward current
3-10

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20
Q

What does the abbreviation FET stand for? T6B08

A

Field Effect Transistor
3-10

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21
Q

What are the names for the electrodes of a diode? T6B09

A

Anode and cathode
3-10

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22
Q

Which of the following can provide power gain? T6B10

A

Transistor
3-11

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23
Q

What is the term that describes a device’s ability to amplify a signal? T6B11

A

Gain
3-11

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24
Q

What are the names of the electrodes of a bipolar junction transistor? T6B12

A

Emitter, base, collector
3-11

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25
Q

What is the nave of an electrical wiring diagram that uses standard component symbols? T6C01

A

Schematic
3-14

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26
Q

What is component 1 in figure T-1? T6C02

A

Resistor
3-14

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27
Q

What is component 2 in figure T-1? T6C03

A

Transistor
3-14

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28
Q

What is component 3 in figure T-1? T6C04

A

Lamp
3-14

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29
Q

What is component 4 in figure T-1? T6C05

A

Battery
3-14

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30
Q

What is component 6 in figure T-2? T6C06

A

Capacitor
3-14

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31
Q

What is component 8 in figure T-2? T6C07

A

Light emitting diode
3-14

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32
Q

What is component 9 in figure T-2? T6C08

A

Transformer
3-14

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33
Q

What is component 4 in figure T-2? T6C09

A

Transformer
3-14

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34
Q

What is component 3 in figure T-3? T6C10

A

Variable inductor
3-14

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35
Q

What is component 4 in figure T-3? T6C11

A

Antennae
3-14

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36
Q

Which of the following is accurately represented in electrical schematics? T6C12

A

Component connections
3-14

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37
Q

Which of the following devices or circuits changes an alternating current into a varying or direct current signal? T6D01

A

Rectifier
3-11

38
Q

What is a relay? T6D02

A

An electrically-controlled switch
3-13

39
Q

Which of the following is a reason to use shielded wire? T6D03

A

To prevent coupling of unwanted signals to or from the wire
9-9

40
Q

Which of the following displays an electrical quantity as a numeric value? T6D04

A

Meter
3-14

41
Q

What type of circuit controls the amount of voltage from a power supply? T6D05

A

Regulator
5-16

42
Q

What component changes 120 V AC power to a lower AC voltage for other uses? T6D06

A

Transformer
3-8

43
Q

Which of the following is commonly used as a visual indicator? T6D07

A

LED
3-11

44
Q

Which of the following is combined with an inductor to make a resonant circuit? T6D08

A

Capacitor
3-10

45
Q

What is the name of a device that combines several semiconductors and other components into one package? T6D09

A

Integrated circuit
3-11

46
Q

What is the function of component 2 in figure T-1? T6D10

A

Control the flow of current
3-11

47
Q

Which of the following is a resonant or tuned circuit? T6D11

A

An inductor and a capacitor in series or parallel
3-10

48
Q

Which term describes the ability of a receiver to detect the presence of a signal? T7A01

A

Sensitivity
5-9

49
Q

What is a transceiver? T7A02

A

A device that combines a receiver and transmitter
2-7

50
Q

Which of the following is used to convert a signal from one frequency to another? T7A03

A

Mixer
3-18

51
Q

Which term describes the ability of a receiver to discriminate between multiple signals? T7A04

A

Selectivity
5-9

52
Q

What is the name of a circuit that generates a signal at a specific frequency? T7A05

A

Oscillator
3-17

53
Q

What device converts the RF input and output of a transceiver to another band? T7A06

A

Transverter
5-11

54
Q

What is the function of a transceiver’s PTT input? T7A07

A

Switches transceiver from receive to transmit when grounded
5-7

55
Q

Which of the following describes combining speech with an RF carrier signal? T7A08

A

Modulation
3-17

56
Q

What is the function of the SSB/CW-FM switch on a VHF power amplifier? T7A09

A

Set the amplifier for proper operation in the selected mode
5-10

57
Q

What device increases the transmitted output power from a transceiver? T7A10

A

An RF power amplifier
5-10

58
Q

Where is an RF preamplifier installed? T7A11

A

Between the antenna and receiver
5-9

59
Q

What can you do if you are told your FM handheld or mobile transceiver is over-deviating? T7B01

A

Talk farther away from the microphone
5-8

60
Q

What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally? T7B02

A

The receiver is unable to reject strong signals outside the AM or FM band
9-8

61
Q

Which of the following can cause radio frequency interference? T7B03

A

All these choices are correct:
-Fundamental overload
-Harmonics
-Spurious emissions
9-8

62
Q

Which of the following could you use to cure distorted audio caused by RF current on the shield f a microphone cable? T7B04

A

Ferrite choke
9-7

63
Q

How can fundamental overload of a non-amateur radio or TV receiver by an amateur signal be reduced or eliminated? T7B05

A

Block the amateur signal with a filter at the antenna input of the affected receiver
9-8

64
Q

Which of the following actions should you take if a neighbor tells you that your station’s transmissions are interfering with their radio or TV reception? T7B06

A

Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel

65
Q

Which of the following can reduce overload of a VHF transceiver by a nearby commercial FM station? T7B07

A

Installing a band-reject filter
9-8

66
Q

What should you do if something in a neighbor’s home is causing harmful interference to your amateur station? T7B08

A

All these choices are correct
-Work with your neighbor to identify the offending device
-Politely inform your neighbor that FCC rules prohibit the use of devices that cause interference
Make sure your station meets the standards of good amateur practice
9-10

67
Q

What should be the first step to resolve non-fiber optic cable TV interference caused by your amateur radio transmission? T7B09

A

Be sure all TV feed line coaxial connectors are installed properly
9-10

68
Q

What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible? T7B10

A

All these choices are correct
-Your transmitter is slightly off frequency
-Your batteries are running low
-You are in a bad location
6-4

69
Q

What is a system of RF feedback in a transmitter or transceiver? T7B11

A

Reports of garbled, distorted, or unintelligible voice transmissions
9-6

70
Q

What is the primary purpose of a dummy load? T7C01

A

To prevent transmitting signals over the air when making tests
5-7

71
Q

Which of the following is used to determine if an antenna is resonant at the desired operating frequency? T7C02

A

An antenna analyzer
4-18

72
Q

What does a dummy load consist of? T7C03

A

A non-inductive resistor mounted on a heat sink
5-7

73
Q

What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line? T7C04

A

1:1
4-10

74
Q

Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level? T7C05

A

To protect the output amplifier transistors
4-10

75
Q

What does an SWR reading of 4:1 indicate? T7C06

A

Impedance mismatch
4-10

76
Q

What happens to power lost in a feed line? T7C07

A

It is converted into heat
4-9

77
Q

Which instrument can be used to determine SWR? T7C08

A

Directional wattmeter
4-18

78
Q

Which of the following causes failure of coaxial cables? T7C09

A

Moisture contamination
4-17

79
Q

Why should the outer jacket of coaxial cable be resistant to ultraviolet light? T7C10

A

Ultraviolet light can damage the jacket and allow water to enter the cable
4-17

80
Q

What is a disadvantage of air core coaxial cable when compared to foam or solid dielectric types? T7C11

A

It requires special techniques to prevent moisture in the cable
4-17

81
Q

Which instrument would you use to measure electric potential? T7D01

A

A voltmeter
3-1

82
Q

How is a voltmeter connected to a component to measure applied voltage? T7D02

A

In parallel
3-2

83
Q

When configured to measure current, how is a multimeter connected to a component? T7D03

A

In series
3-2

84
Q

Which instrument is used to measure electric current? T7D04

A

An ammeter
3-1

85
Q

Which of the following can damage a multimeter? T7D06

A

Attempting to measure voltage when using the resistance setting
3-4

86
Q

Which of the following measurements are made using a multimeter? T7D07

A

Voltage and resistance
3-4

87
Q

Which of the following types of solder should not be sued for radio and electronic applications? T7D08

A

Acid-core solder
4-17

88
Q

What is the characteristic appearance of a cold tin-lead solder joint? T7D09

A

A rough or lumpy surface
4-17

89
Q

What reading indicates that an ohmmeter is connected across a large, discharged capacitor? T7D10

A

Increasing resistance with time
3-4

90
Q

Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter? T7D11

A

Ensure that the circuit is not powered
3-4

Ham Radio Technician (6 decks)

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