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Ham Radio Technician > Technician T2 and T3 Test Questions > Flashcards

Technician T2 and T3 Test Questions Flashcards

1
Q

What is a common repeater frequency offset in the 2 meter band? T2A01

A

Plus or minus 600 kHz
6-11

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2
Q

What is the national calling frequency for FM simplex operations in the 2 meter band? T2A02

A

146.520 MHz
6-6

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3
Q

What is a common repeater frequency offset in the 70 cm band? T2A03

A

Plus or minus 5 MHz
6-11

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4
Q

What is an appropriate way to call another station on a repeater if you know the other station’s call sign? T2A04

A

Say the station’s call sign, then identify with your call sign
6-4

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5
Q

How should you respond to a station calling CQ? T2A05

A

Transmit the other station’s call sign followed by your call sign
6-6

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6
Q

Which of the following is required when making on-th-air test transmissions? T2A06

A

Identify the transmitting station
8-5

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7
Q

What is meant by “repeater offset”? T2A07

A

The difference between a repeater’s transmit and receive frequencies
6-11

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8
Q

What is the meaning of the procedural signal “CQ”? T2A08

A

Calling any station
6-6

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9
Q

Which of the following indicates that a station is listening on a repeater and looking for a contact? T2A09

A

The station’s call sign followed by the word “ monitoring”
6-4

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10
Q

What is a band plan, beyond the privileges established by the FCC? T2A10

A

A voluntary guideline for using different modes or activities within an amateur band
6-1

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11
Q

What term describes an amateur station that is transmitting and receiving on the same frequency? T2A11

A

Simplex
6-1

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12
Q

What should you do before calling CQ? T2A12

A

All these choices are correct
-Listen first to be sure that no one else is using the frequency
-Ask if the frequency is in use
-Make sure you are authorized to use that frequency
6-6

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13
Q

How is a VHF/UHF transceiver’s “reverse” function used? T2B01

A

To listen on a repeater’s input frequency
6-6W

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14
Q

What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver? T2B02

A

CTCSS
6-12

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15
Q

Which of the following describes a linked repeater network? T2B03

A

A network of repeaters in which signals received by one repeater are transmitted by all the repeaters in the network
6-12

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16
Q

Which of the following could be the reason you are unable to access a repeater whose output you can hear? T2B04

A

All these choices are correct
-Improper transceiver offset
-You are using the wrong CTCSS tone
-You are using the wrong DCS code

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17
Q

What would cause your FM transmission audio to be distorted on voice peaks? T2B05

A

You are talking too loudly
5-8

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18
Q

What type of signaling uses pairs of audio tones? T2B06

A

DTMF
6-13

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19
Q

How can you join a digital repeater’s “talkgroup”? T2B07

A

Program your radio with the group’s ID or code
6-13

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20
Q

Which of the following applies when two stations transmitting on the same frequency interfere with each other? T2B08

A

The stations should negotiate continued use of the frequency
8-5

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21
Q

Why are simplex channels designated in the VHF/UHF band plans? T2B09

A

So stations within range of each other can communicate without tying up a repeater
6-6

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22
Q

Which Q signal indicates that you are receiving interference from other stations? T2B10

A

QRM
6-7

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23
Q

Which Q signal indicates that you are changing frequency? T2B11

A

QSY
6-7

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24
Q

What is the purpose of the color code used on DMR repeater systems? T2B12

A

Must match the repeater color code for access
6-13

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25
Q

What is the purpose of a squelch function? T2B13

A

Mute the receiver audio when a signal is not present
5-8

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26
Q

When do FCC rules NOT apply to the operation of an amateur station? T2C01

A

FCC rules always apply
6-19

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27
Q

Which of the following are typical duties of a Net Control Station? T2C02

A

Call the net to order and direct communications between stations checking in
6-16

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28
Q

Whiat technique is used to ensure that voice messages containing unusual words are received correctly? T2C03

A

Spell the words using a standard phonetic alphabet
6-17

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29
Q

What is RACES? T2C04

A

An FCC part 97 amateur radio service for civil defense communications during national emergencies
6-18

30
Q

What does the term “traffic” refer to in net operation? T2C05

A

Message exchanged by net stations
6-16

31
Q

What is the Amateur Radio Emergency Service (ARES)? T2C06

A

A group off licensed amateurs who have voluntarily registered their qualifications and equipment for communications duty in the public service
6-18

32
Q

Which of the following is standard practice when you participate in a net? T2C07

A

Unless you are reporting an emergency, transmit only when directed by the net control station
6-16

33
Q

Which of the following is a characteristic of good traffic handling? T2C08

A

Passing messages exactly as received
6-17

34
Q

Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class? T2C09

A

Yes, but only in situations involving the immediate safety of human life or protection of property
6-19

35
Q

What information is contained in the preamble of a formal traffic message? T2C10

A

Information needed to track the message
6-17

36
Q

What is meant by “check” in a radiogram header? T2C11

A

The number of words or word equivalents in the text portion of the message
6-17

37
Q

Why do VHF signal strengths sometimes vary greatly when the antenna is moved only a few feet? T3A01

A

Multipath propagation cancels or reinforces signals
4-1

38
Q

What is the effect of vegetation on UHF and microwave signals? T3A02

A

Absorption
4-1

39
Q

What antenna polarization is normally used for long-distance CW and SSB contacts on the VHF and UHF bands? T3A03

A

Horizontal
4-15

40
Q

What happens when antennas at opposite ends of a VHF or UHF line of sight radio link are not using the same polarization? T3A04

A

Received signal strength is reduced
4-5

41
Q

When using a directional antenna, how might your station be able to communicate with a distant repeater if buildings or obstructions are blocking the direct line of sight path? T3A05

A

Try to find a path that reflects signals to the repeater
4-15

42
Q

What is the meaning of the term “picket fencing”? T3A06

A

Rapid flutter on mobile signals due to multipath propagation
4-1

43
Q

What weather condition might decrease range at microwave frequencies? T3A07

A

Precipitation
4-1

44
Q

What is a likely cause of irregular fading of signals propagated by the ionosphere? T3A08

A

Random combining of signals arriving via different paths

45
Q

Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized? T309

A

Either vertically or horizontally polarized antennas may be used for transmission or reception
4-5

46
Q

Which region of the atmosphere can refract or bend HF and VHF radio waves? T3A11

A

The ionosphere
4-3

46
Q

What effect does multipath propagation have on data transmissions? T3A10

A

Error rates are likely to decrease
4-1

47
Q

What is the effect of fog and rain on signals in the 10 meter and 6 meter bands? T3A12

A

There is little effect
4-1

48
Q

What is the relationship between the electric and magnetic fields of an electromagnetic wave? T3B01

A

They are at right angles
4-5

49
Q

What property of a radio wave defines its polarization? T3B02

A

The orientation of the electric field
4-5

50
Q

What are the two components of a radio wave? T3B03

A

Electric and magnetic fields
4-5

51
Q

What is the velocity of a radio wave traveling through free space? T3B04

A

Speed of light
2-5

52
Q

What is the relationship between wavelength and frequency? T3B05

A

Wavelength gets shorter as frequency increases
2-5

53
Q

What is the formula for converting frequency to approximate wavelength in meters? T3B06

A

Wavelength in meters equals 300 divided by frequency in megahertz
2-5

54
Q

In addition to frequency, which of the following is used to identify amateur radio bands? T3B07

A

The approximate wavelength in meters
2-5

55
Q

What frequency range is referred to as VHF? T3B08

A

30MHz to 300MHz
2-4

56
Q

What frequency range is referred to as UHF? T3B09

A

300 to 3000 MHz
2-4

57
Q

What frequency range is referred to as HF? T3B10

A

3 to 30 MHz
2-4

58
Q

What is the approximate velocity of a radio wave in free space?

A

300,000,000 meters per second
2-5

59
Q

Why are simplex UHF signals rarely heard beyond their radio horizon? T3C01

A

UHF signals are usually not propagated by the ionosphere
4-3

60
Q

What is a characteristic of HF communication compared with communications on VHF and higher frequencies? T3C02

A

Long-distance ionospheric propagations is far more common on HF
4-3

61
Q

What is a characteristic of VHF signals received via auroral backscatter? T3C03

A

They are distorted and signal strength varies considerably
4-3

62
Q

Which of the following types of propagation is most commonly associated with occasional strong signals on the 10, 6 and 2 meter bands from beyond the radio horizon? T3C04

A

Sporadic E
4-3

63
Q

Which of the following effects may allow radio signals to travel beyond obstructions between the transmitting and receiving stations? T3C05

A

Knife-edge diffraction
4-1

64
Q

What type of propagation is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis? T3C06

A

Tropospheric ducting
4-1

65
Q

What band is best suited for communicating via meteor scatter? T3C07

A

6 meters
4-3

66
Q

What causes tropospheric ducting? T3C08

A

Temperature inversions in the atmosphere
4-2

67
Q

What is generally the best time for long-distance 10 meter band propagation via the F region? T3C09

A

From dawn to shortly after sunset during periods of high sunspot activity
4-3

68
Q

Which of the following bands may provide long-distance communications via the ionosphere’s F region during the peak of the sunspot cycle? T3C10

A

6 and 10 meters
4-3

69
Q

Why is the radio horizon for VHF and UHF signals more distant than the visual horizon? T3C11

A

The atmosphere refracts radio waves slightly
4-2

Ham Radio Technician (6 decks)

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