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Ham Radio Technician > Technician - pretest > Flashcards

Technician - pretest Flashcards

0
Q

regulating Agency united states

A

FCC

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1
Q

Ham radio intended for

A

Solely personal aim

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2
Q

FCC ham rules

A

Part 97

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3
Q

Definition telecomand

A

One way transmission

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4
Q

Recommends channels for aux and repeaters

A

Frequency coordinator

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5
Q

Station transmits from remote to repeater

A

Auxiliary station

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6
Q

ITU

A

United Nations

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7
Q

North American ITU region

A

2

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8
Q

6 meter band

A

52.525

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9
Q

146.52

A

2 meter band

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10
Q

70 cm technician ITU 2 frequency

A

443.350

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11
Q

23 cm technician frequency

A

1296

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12
Q

Modes permitted at 50 to 50.1 and 144 to 144.1

A

CW only

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13
Q

Single letter used for

A

Event

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14
Q

Valid US call

A

w3abc

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15
Q

When foreign transmission allowed

A

Authorized

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16
Q

If Interfering with radiolocation outside US

A

Stop operating

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17
Q

Term for license

A

10 years

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18
Q

Grace period

A

2 years

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19
Q

Countries prohibited

A

Any notified ITU

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20
Q

Equipment sale

A

Not regular basis

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21
Q

Authorized broadcasting, program production

A

Immediate safety

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22
Q

Meaning of broadcasting

A

Reception by public

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23
Q

Communications Permitted

A

Adjustments

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24
Q

Must control operator

A

Transmitting

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25
Q

Who designates operator

A

Station Licensee

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26
Q

Determines transmitting privileges

A

Class of control operator

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27
Q

Who Controls transmitting handheld

A

Local

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28
Q

Control indirectly adjustments

A

Remote

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29
Q

FCC presumes control operator

A

Station licensee

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30
Q

ID for race HQ

A

Tactical call

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31
Q

How often give call sign

A

10 min

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32
Q

Must give call sign

A

10 min and end

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33
Q

Station ID language

A

English

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34
Q

Call sign for phone transmission

A

CW or phone

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35
Q

Restrictions for self assigned call

A

Must not conflict

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36
Q

When technician in exclusive extra class segment

A

Never

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37
Q

Station that retransmits on another frequency

A

Repeater

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38
Q

Who accountable for transmit violation

A

Control operator originating station

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39
Q

club members required

A

4

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40
Q

FM simplex 70cm

A

446.000

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41
Q

Repeater frequency offset 70 cm

A

5 mhz

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42
Q

Response to CQ

A

Other call sign - your call sign

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43
Q

To do test transmission

A

ID transmitting station

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44
Q

CQ means

A

Any station

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45
Q

Transmitting and receiving on same frequency

A

Simplex

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46
Q

Sub-audible with normal voice to open squelch

A

CTCSS

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47
Q

Deviation of FM signal

A

Just amplitude

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48
Q

Increase deviation FM

A

Occupies more bandwidth

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49
Q

ID when using phone

A

Call sign in CW and voice

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50
Q

Q sig for interference

A

QRM

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51
Q

Q sig for changing frequency

A

QSY

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52
Q

Rules for ham

A

FCC

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53
Q

Races and Ares

A

Emergencies

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54
Q

Min disruptions emergency net

A

Wait til asked to transmit

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55
Q

Most important job

A

Passing message exactly

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56
Q

When safety gives authorization

A

Normal not available

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57
Q

Polarization for long dist weak CW and SSB VHF and UHF

A

Horizontal

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58
Q

Antennas opposite end VHF or UHF line of site not same polarization

A

Significantly weaker

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59
Q

Rapid fluttering from mobile

A

Picket fencing

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60
Q

Type of wave used

A

Electromagnet

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61
Q

Skip reflections between earth and ionosphere

A

Polarization of signal is randomized

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62
Q

Propagation over multiple paths

A

Errors increase

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63
Q

Enables propagation

A

Ionosphere

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64
Q

Distance of 1 radio cycle

A

Wavelength

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65
Q

Times per sec AC reverses direction

A

Frequency

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66
Q

2 components of radio wave

A

Electric and magnetic

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67
Q

Radio wave speed

A

Speed of light

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68
Q

Relationship of length to frequency

A

Inverse

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69
Q

Formula frequency to wavelength in meters

A

300 divided by frequency MHz

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70
Q

How to identify frequency bands

A

Approximate wavelength

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71
Q

Frequency limits VHF

A

30 to 300 MHz

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72
Q

Frequency range HF

A

3 to 30 MHz

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73
Q

Why non repeated UHF only local

A

Not reflected by ionosphere

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74
Q

When VHF signals found long distance usually because

A

Refracted from sporadic E layer

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75
Q

Characteristic of VHF auroral reflection

A

Rapid fluctuations of strength and sound distorted

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76
Q

Propagation types of strong over-horizon signals on 10, 6, and 2 meter

A

Sporadic E

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77
Q

Knife-edge propagation

A

Partially refracted around solid objects showing sharp edges

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78
Q

Meteor scatter band

A

6 meters

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79
Q

Tropospheric ducting cause

A

Temp inversions

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80
Q

Best time for long distance 10 meter

A

Daylight

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81
Q

Why UHF and VHF beyond line of sight

A

Seems less curved to radio

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82
Q

Replacement for speaker

A

Headphones

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83
Q

Filter location for harmonic emissions

A

Transmitter and antenna

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84
Q

Best conductor for RF grounding

A

Flat strap

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85
Q

To reduce RF on the shield of audio cable

A

Ferrite choke

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86
Q

Varying High pitched whine

A

Alternator

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87
Q

Connect mobile power negative

A

Battery or engine ground strap

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88
Q

To enter operator frequency

A

Keypad or VFO knob

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89
Q

Favorite frequency access

A

Memory channel

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90
Q

Reduce ignition interference

A

Noise blanker

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91
Q

Receive filter for SSB

A

2400 Hz

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92
Q

Receive filter for CW

A

500 Hz

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93
Q

Repeater offset

A

Diff between transmit and receive

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94
Q

Power

A

Watts

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95
Q

Electron flow

A

Current

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96
Q

Current in one direction

A

DC

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97
Q

Force (EMF) that causes electron flow

A

Voltage

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98
Q

Mobile transceiver voltage

A

12 volts

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99
Q

Good conductor

A

Copper

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100
Q

Good insulator

A

Glass

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101
Q

Rate electric used

A

Power

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102
Q

Elec force unit

A

Volt

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103
Q

1.5 amp

A

1500 milli

104
Q

1,500,000 Hz

A

1500 kHz

105
Q

Kilovolt

A

1000 volts

106
Q

Microvolt

A

1 millionth of volt

107
Q

500 milliwatts

A

0.5 watts

108
Q

3000 milliamper current

A

3 ampers

109
Q

3.525 MHz

A

3525 kHz

110
Q

1,000,000 picofarads

A

1 micro

111
Q

Change in dB 5 watts to 10 watts

A

3 dB

112
Q

Change in dB decrease 12 watts to 3 watts

A

6 dB

113
Q

Change dB 20 watts to 200 watts

A

10 dB

114
Q

Unit of capacitance

A

Farad

115
Q

Ability to store magnetic

A

Inductance

116
Q

Unit inductance

A

Henry

117
Q

Unit frequency

A

Hz

118
Q

All radio signals

A

RF

119
Q

Waves in space

A

Radio

120
Q

Power used 12 volts and current 2.5 amp

A

30 watts

121
Q

Amperes in 12 volts and load 120 watts

A

10 amps

122
Q

Current (I) =

A

Voltage (E) / Resistance (R)

123
Q

Resistance (R) =

A

Voltage (E) / current (I)

124
Q

3amp current thru resistor connected to 90 volts = ? Resistance

A

30 ohms

125
Q

Applied voltage 12 volts and current 1.5 amp = ? Resistance

A

8 ohms

126
Q

Circuit draws 4 amps from 12 volt source

A

3 ohms

127
Q

Voltage 120 and 80 ohm resistance = ? Current flow

A

1.5 amp

128
Q

100 ohm resistor and 200 volts =? Current

A

2 amp

129
Q

24 ohm resistor and 240 volts = ? Current

A

10 amp

130
Q

2 ohm resistor and 0.5 amp current = ? Voltage

A

1 volt

131
Q

10 ohm resistor and 1 amp current = ? Voltage

A

10 volts

132
Q

10 ohm resistor and 2 amp current = ? Voltage

A

20 volts

133
Q

Component to oppose DC current

A

Resistor

134
Q

Adjustable volume control device

A

Potentiometer

135
Q

Parameter controlled by potentiometer

A

Resistance

136
Q

2 or more conductive surfaces separated by an insulator

A

Capacitorw

137
Q

Component that stores energy in magnetic field

A

Inductor

138
Q

Component composed of coil of wire

A

Inductor

139
Q

Component to connect/ disconnect electrical circuits

A

Switch

140
Q

Components used to protect components from current overloads

A

Fuse

141
Q

Nominal voltage of nickel cadmium cell

A

1.2 volts

142
Q

Batter type not rechargeable

A

Carbon zinc

143
Q

Class of components Uses voltage or current signal to control flow

A

Transistors

144
Q

Allows flow in only one direction

A

Diode

145
Q

Used as switch or amplifier

A

Transistor

146
Q

Can amplify signals

A

Transistor

147
Q

To identify diode’s cathode lead

A

A stripe

148
Q

LED means

A

Light emitting diode

149
Q

FET means

A

Field effect transister

150
Q

Semiconductor component with emitter electrode

A

Bipolar transistor

151
Q

Transistors ability to amplify a signal is called

A

Gain

152
Q

Standardized representations of components

A

Schematic symbols

153
Q

Study pages 11-43 thru11-47

A

L

154
Q

Changes an AC into varying DC signal

A

Rectifier

155
Q

Used to display signal strength on a numerical scale

A

Meter

156
Q

Controls amount of voltage from power supply

A

Regulator

157
Q

Used to change 120v AC to lower AC

A

Transformer

158
Q

Used as visual indicator

A

LED

159
Q

Used with inductor to make tuned circuit

A

Capacitor

160
Q

Combines several semiconductors and other components into one package

A

Integrated circuit

161
Q

Common use of coax

A

Carry RF between radio and antenna

162
Q

Function of product detector

A

Detect CW and SSB signals

163
Q

11-48 thru 11-50

A

.

164
Q

Function of mixer in superheterodyne receiver

A

Shift incoming signal to intermediate frequency

165
Q

Takes output of low powered 28 MHz SSB and produces 222 MHz signal

A

Transverter

166
Q

Combines speech signal and RF carrier

A

Modulator

167
Q

Most useful for VHF weak signal communication

A

Multi-mode VHF transceiver

168
Q

Increases low power output from a handheld transceiver

A

RF power amplifier

169
Q

Demodulates FM signals

A

Discriminator

170
Q

Ability to discriminate between multiple signals

A

Selectivity

171
Q

Where is RF preamplifier installed

A

Between antenna and receiver

172
Q

What is fundamental overload in reference to a reciever

A

Interference caused by very strong signals

173
Q

1st step to cure telephone frequency interference

A

RF filter at the telephone

174
Q

BER means

A

Bit error rate

175
Q

Instrument to determine antenna resonance at the desired operating frequency

A

Antenna analyzer

176
Q

Standing wave ratio (SWR) means

A

How well load matches a transmission line

177
Q

SWR perfect impedance between antenna and feed line

A

1 to 1

178
Q

Max SWR before solid state transmitters protection circuits reduce transmitter power

A

2 to 1

179
Q

SWR of 4 to 1 means

A

impedance mismatch

180
Q

Power lost in feed line

A

Converted to heat.

181
Q

Most common cause of coax failure

A

Moisture contamination

182
Q

Instrument for measuring electric potential or electromotive force

A

Voltmeter

183
Q

Way to connect voltmeter to a circuit

A

Parallel with the circuit

184
Q

How is ammeter connected to a circuit

A

Series with a circuit

185
Q

Measures electric current

A

Ammeter

186
Q

Used to measure resistance

A

Ohmmeter

187
Q

Measured with multimeter

A

Voltage and resistance

188
Q

Solder for radio equipment

A

Rosin-core

189
Q

Cold solder joint appearance

A

Grainy or dull

190
Q

Precautions when measuring circuit resistance with ohmmeter

A

Circuit is not powered

191
Q

form of amplitude modulation

A

Single side band

192
Q

Modulation used for VHF packet radio transmission

A

FM

193
Q

Voice modulation used for long-distance or weak signal contacts on VHF and UHF bands

A

SSB

194
Q

Modulation used for VHF and UHF voice repeaters

A

FM

195
Q

Emmission with narrowest bandwidth

A

CW

196
Q

Sideband used for 10 meter HF, VHF, and UHF

A

Upper sideband

197
Q

Advantage of SSB over FM for voice transmission

A

SSB have narrower bandwidth

198
Q

Bandwidth of SSB voice signal

A

3khz

199
Q

Bandwidth of VHF repeater FM phone signal

A

Between 5 and 15 kHz

200
Q

Bandwidth of analog fast-scan tv transmission of 70 cm band

A

6 MHz

201
Q

Max bandwidth to transmit CW

A

150 hz

202
Q

Who can contact international space station on 2 meter and 70 meter

A

Technician or higher

203
Q

What is U/V mode

A

Uplink is 70 cm and downlink is 2 meter

204
Q

Cause of spin fading

A

Rotation of satellite

205
Q

What is LEO

A

Low earth orbit

206
Q

Method of signaling digital satellite

A

FM packet

207
Q

Useful for a hidden transmitter hunt

A

Directional antenna

208
Q

Contacting as many stations as possible

A

Contesting

209
Q

Contest strategy

A

Minimum info

210
Q

A grid locator is

A

Letter-number designator assigned to geographic location

211
Q

Purpose of “1 by 1” call sign

A

Activity of special significance

212
Q

Max power allowed for telecommand to radio controlled models

A

1 watt

213
Q

On-air station ID substitute for radio control models

A

Label with licensee name, call sign, address affixed to the transmitter

214
Q

To Obtain active nodes using VoIP

A

Repeater directory

215
Q

Device connecting stations to Internet

A

Gateway

216
Q

Used to send auto location reports via radio

A

GPS

217
Q

NTSC

A

Analog fast scan color tv signal

218
Q

Technician class modes between 219 and 220

A

Data

219
Q

PSK

A

Phase shift keying

220
Q

PSK31

A

Low- rate data transmission

221
Q

Beam antenna

A

One direction

222
Q

Vertical antennas

A

Perpendicular to earth

223
Q

To make dipole resonate on higher frequency

A

Shorten it

224
Q

Quad, Yagi, and dish

A

Directional antennas

225
Q

Approx length of a quarter-wavelength vertical antenna for 146 MHz

A

19 inches

226
Q

Length of 6 meter 1/2 wavelength wire dipole antenna

A

112 inches

227
Q

Strongest radiation direction of half-wave dipole in free space

A

Broadside to the antenna

228
Q

Value of low SWR in antenna with coax feed line

A

Efficient transfer of power and low loss

229
Q

Impedance of common coax

A

50 ohm

230
Q

Connector best for frequencies above 400 MHz

A

Type N

231
Q

As frequency of signal increases in coax

A

Loss increases

232
Q

Why should coax connectors be sealed against weather

A

To prevent increase in feed line loss

233
Q

Cause of erratic changes in SWR

A

Loose connection in antenna feed line

234
Q

What electrical difference exists between smaller Rg-58 and larger RG-8 coax

A

8 has less loss at a given frequency

235
Q

Feed line with lowest loss at VHF and UHF

A

Air insulated hard line

236
Q

Lowest voltage to cause dangerous shock

A

30 volts

237
Q

Green wire =

A

Safety ground

238
Q

Fuse does

A

Interrupt overload

239
Q

Why not install 20-amp fuse for 5 amp fuse

A

Could cause fire

240
Q

Caution for lightening protection in coax cable feedline

A

Ground all to common plate which is connected to external ground

241
Q

To recharge 12-volt lead acid battery if power out

A

Use car battery

242
Q

12-volt battery hazard

A

Explosive gas if not vented

243
Q

When installing ground wires on a tower for lightening protection

A

Short and direct connections

244
Q

Before climbing antenna tower

A

Harness and safety goggles

245
Q

When putting up tower

A

Watch for power lines

246
Q

Gin pole for?

A

Lift tower sections or antennas

247
Q

When using crank-up tower

A

Never climb unless fully retracted

248
Q

Proper grounding method for a tower

A

Separate 8 foot ground rods for each leg bonded to tower and each other

249
Q

Don’t attach antenna to utility pole because

A

High- voltage power lines

250
Q

Grounding conductors used for lightening protection

A

Avoid sharp bends

251
Q

Grounding requirements for tower or antenna

A

Electrical codes

252
Q

Frequency with lowest max exposure limit

A

50 MHz

253
Q

Max power level station may use at VHF frequencies before RF exposure evaluation required

A

50 watts PEP at the antenna

254
Q

Touch antenna

A

RF burn

255
Q

To prevent RF exposure

A

Relocate antenna

256
Q

Ensuring compliance with RF safety regs

A

Re-evaluate when equipment changed

257
Q

Why duty cycle considered

A

Affects average exposure to radiation

258
Q

Duty cycle?

A

Ratio of on-air time to total operating time of signal

Ham Radio Technician (2 decks)

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