Updated April 2026
One of my hobbies is Ham Radio (Amateur Radio). There are three classes of licences: Technician, General, and Amateur Extra. You must pass a multiple choice exam to be granted one of the classes. The exam covers 35 (Technician and General) or 50 (Amateur Extra) topics. One question is taken from the question pool for each topic.
While taking practice exams, I noticed that there were some words that would only appear in the correct answer. I decided to do an analysis of the question pools. I took each question pool and found all words that appeared once in the correct answer.
Here are the question numbers and the words that are unique in each question pool:
T1A01 advancing, skills, phases, art
T1A03 encouraged
T1A05 uls
T1A06 purposes, observing, experimental
T1A07 km, earth's
T1A08 volunteer
T1A09 area, eligible
T1B03 52.525
T1B05 systems
T1B07 50.0, 50.1, 144.0, 144.1
T1B08 find, non-amateur
T1B12 t1c, classes, sequential, vanity, systems, places, regulated, term, grace, maintaining
T1C03 purposes, character
T1C05 kf1xxx
T1C06 vessel, craft, waters, documented, states
T1C07 maintain
T1C10 fcc’s
T1C11 renewed, t1d, countries, exchange, indecent, retransmission, encryption, unidentified, one-way
T1D03 commands, craft
T1D04 retransmission, spacecraft
T1D05 selling, basis
T1D08 classroom, instruction, educational, institution
T1D09 directly, immediate
T1D10 reception
T1D11 craft, t1e, eligibility, designating, privileges, duties
T1E11 t1f
T1F01 upon, representative
T1F07 agreement
T1F08 behalf
T1F11 four
T2A02 146.520
T2A10 voluntary, guideline
T2A11 simplex
T2A12 t2b, vhf/uhf, simplex, splits, resolving, operational
T2B05 talking
T2B07 id
T2B08 negotiate, continued
T2B09 communicate, tying
T2B10 qrm
T2B13 mute
T2C02 order
T2C03 spell, standard, phonetic, alphabet
T2C05 exchanged
T2C06 qualifications
T2C07 unless, reporting
T2C08 passing, exactly
T2C09 situations, involving, immediate
T2C10 needed
T2C11 equivalents
T3A01 cancels, reinforces
T3A05 find, reflects
T3A06 flutter
T3A07 precipitation
T3A08 random, arriving
T3A09 horizontally, reception
T3A11 ionosphere
T3A12 little
T3B05 shorter
T3B07 approximate
T3C01 propagated, ionosphere
T3C03 distorted, varies, considerably
T3C08 temperature, inversions, atmosphere
T3C11 atmosphere, refracts
T4A03 minimize
T4A04 wsjt-x
T4A08 flat
T4A09 ampere-hour, draw
T4A10 systems
T4A11 chassis
T4A12 assists, manual
T4B01 distorted
T4B02 keypad, vfo, knob
T4B04 store
T4B05 tunes
T4B06 clarifier
T4B07 talkgroups
T4B08 reduction
T4B10 2400
T4B12 signal’s, t5, t5a, insulators
T5A07 electrons
T5A08 glass
T5A12 t5b, math, decibels
T5B04 one-millionth
T5B07 3525
T5B08 microfarad
T5B13 2.425
T5C09 138
T5C12 opposition
T5C13 t5d, ohm’s, law
T6B01 others
T6B05 field-effect
T6B06 stripe
T6B09 anode
T6B12 emitter, collector
T6C07 emitting
T6D01 rectifier
T6D02 electrically-controlled
T6D03 coupling, unwanted
T6D07 led
T7A02 combines
T7A03 mixer
T7A06 transverter
T7A09 selected
T7B01 farther
T7B02 unable, reject, outside
T7B04 ferrite
T7B05 affected
T7B06 functioning, does, own
T7B07 band-reject
T7B09 installed
T7B11 reports, garbled, distorted, unintelligible
T7C01 air
T7C02 analyzer
T7C03 non-inductive, mounted, heat, sink
T7C04 1:1
T7C05 protect
T7C06 mismatch
T7C07 converted, heat
T7C08 directional, wattmeter
T7C09 moisture
T7C10 enter
T7C11 requires, moisture
T7D04 t7d05, section, renumbered
T7D08 acid-core
T7D09 rough, lumpy
T8A06 upper
T8A07 narrower
T8B01 health
T8B02 blocking, users
T8B06 keplerian
T8B07 relative, motion
T8B08 centimeter
T8C02 directional
T8C03 contesting
T8C04 needed, exchange
T8C05 geographic
T8C07 delivering
T8C08 systems, voip
T8C10 proof
T8C11 gateway
T8D02 way, users, hearing
T8D04 analog
T8D05 conjunction, map, locations
T8D07 time-multiplexing, 12.5
T8D11 detects, errors, sends, retransmission
T8D12 amateur-radio, wi-fi, firmware
T8D13 capable
T9A01 concentrates
T9A02 electrically
T9A03 horizontally
T9A05 shortening
T9A06 yagi
T9A08 19
T9A10 broadside
T9A12 1/4-wavelength
T9B03 easy, requires
T9B04 matches, transceiver's
T9B06 n
T9B07 commonly
T9B09 loose
T9B10 rg-213, given
T9B11 air-insulated, hardline
T9B12 well, matched
T0A01 shorting, burns, fire, explosion
T0A04 remove
T0A05 could, fire
T0A07 enter, building
T0A09 bond, heavy, conductive
T0A10 overheating, out-gassing
T0A11 charge
T0A12 leads, measured
T0B04 look, clear, overhead
T0B05 loosening, vibration
T0B06 falls, come, closer
T0B07 climbed, unless, retracted, installed
T0B08 eight-foot, rods, leg, bonded
T0B09 could
T0B10 sharp
T0C05 absorbs, others
T0C07 burn, skin
T0C09 re-evaluating, whenever, item, changed
T0C12 does, chemical, dna
T1A01 advancing, skills, phases, art
T1A03 encouraged
T1A04 link, download
T1A05 uls
T1A06 28.200
T1A07 km, earth's
T1A09 area, eligible
T1A10 enrollment, defense
T1A11 willful, malicious
T1B03 52.525
T1B07 50.0, 50.1, 144.0, 144.1
T1B08 find, non-amateur
T1B12 t1c, classes, sequential, vanity, systems, places, regulated, grace, maintaining
T1C03 purposes, character
T1C05 kf1xxx
T1C06 us-documented, vessel, master's, permission
T1C07 90
T1C10 fcc’s
T1C11 renewed, t1d
T1D03 commands, craft
T1D04 retransmission, spacecraft
T1D05 selling, basis
T1D07 one-way
T1D08 classroom, instruction, educational, institution
T1D09 directly, immediate
T1D11 craft
T1E11 t1f, third, party
T1F01 upon, representative
T1F07 agreement
T1F08 behalf
T1F11 four
T2A02 146.520
T2A10 voluntary, guideline
T2B05 talking
T2B07 id
T2B08 negotiate, continued
T2B09 communicate, tying
T2B10 qrm
T2B12 programmed
T2B13 mute
T2B14 identifier, organize, want, hear, aren’t, bothered
T2C02 order
T2C03 spell, phonetic, alphabet
T2C04 defense
T2C05 formal, exchanged
T2C06 qualifications
T2C07 unless, reporting
T2C08 winlink
T2C09 situations, involving, immediate
T2C10 needed
T2C11 equivalents
T3A01 cancels, reinforces
T3A02 absorbs, leading
T3A04 reduced
T3A05 find, reflects
T3A06 flutter
T3A07 precipitation
T3A08 random, arriving
T3A09 vertically, horizontally
T3A11 ionosphere
T3A12 little
T3B05 shorter
T3B07 approximate
T3B12 t3c, sporadic, auroral, tropospheric, ducting, f, skip, sight
T3C01 propagated, ionosphere
T3C02 long-distance
T3C03 distorted, raspy
T3C04 sporadic
T3C06 tropospheric, ducting
T3C08 temperature, inversions, atmosphere
T3C11 atmosphere, refracts
T4A08 flat
T4A09 ampere-hour, draw
T4A11 12-volt, chassis
T4A12 assists, manual
T4B01 distorted
T4B02 keypad, knob
T4B04 becomes, distorted
T4B06 clarifier
T4B07 loaded, onto, talkgroups
T5A07 electrons
T5A08 glass
T5A11 t5b, math, decibels
T5B04 one-millionth
T5B07 3525
T5B08 microfarad
T5B13 2.425
T5C09 138
T5C12 opposition
T6A11 carbon-zinc
T6B05 field-effect
T6B06 stripe
T6B09 anode
T6B12 emitter, collector
T6C07 emitting
T6D01 rectifier
T6D02 electrically-controlled
T6D03 coupling, unwanted
T6D07 led
T7A02 combines
T7A03 mixer
T7A06 transverter
T7A09 selected
T7B01 farther
T7B02 unable, reject, outside
T7B05 affected
T7B06 functioning, does, own, television, tuned
T7B07 band-reject
T7B09 installed
T7B11 clip-on, ferrite, feeding
T7C01 air
T7C02 analyzer
T7C03 non-inductive, heat, sink
T7C04 1:1
T7C05 protect
T7C06 mismatch
T7C07 converted, heat
T7C10 enter
T7C11 foot
T7D05 small
T7D08 acid-core
T7D09 rough, lumpy
T8A06 upper
T8A07 narrower
T8B02 blocking, users
T8B06 keplerian
T8B07 caused, motion
T8B08 70-centimeter
T8B09 its
T8C04 minimum, needed
T8C05 geographic
T8C06 dual-tone, multi-frequency
T8C07 delivering
T8C08 systems
T8C10 proof
T8C11 gateway
T8D02 capable
T8D05 conjunction, map, locations
T8D07 time-multiplexing, 12.5
T8D11 detects, errors, sends, retransmission
T8D12 wi-fi, firmware
T9A01 concentrates
T9A02 electrically
T9A05 shortening
T9A06 yagi
T9A07 reduced
T9A08 quarter-wave
T9A10 broadside
T9A11 specified
T9B03 easy, requires
T9B04 matches, transceiver's
T9B07 commonly
T9B09 loose
T9B10 rg-213, given
T9B11 air-insulated, hardline
T9B12 well, matched
T0A01 shorting, burns, fire, explosion
T0A04 remove
T0A05 excessive, fire
T0A07 enter, building
T0A09 bond, together, heavy, conductive
T0A10 overheating, out-gassing
T0A11 charge
T0A12 its, leads, measured
T0B04 look, stay, clear, overhead
T0B05 loosening, vibration
T0B06 falls, come
T0B07 climbed, unless, retracted, installed
T0B08 eight-foot, rods, leg, bonded
T0B10 sharp
T0C05 absorbs
T0C07 burn, skin
T0C09 re-evaluating, whenever, item, changed
T0C12 does, chemical, dna
G1A05 7.125, 7.175
G1A06 harmful, accept
G1A09 21300
G1A10 29.5
G1B03 observation
G1B04 occasional, weather, forecast, information
G1B05 assist, learning
G1B06 reasonably, constitute, accommodate
G1B07 do, obscure, meaning
G1B08 whose, administrations, notified
G1B09 28.20, 28.30
G1C03 2.8
G1C07 publicly, document, technical, characteristics
G1C11 g1d, coordinators, credit
G1D01 demonstrate, advanced, revoked
G1D08 granted
G1D09 365
G1D11 applicant, proof, grant
G1E01 party’s, revoked
G1E02 holds
G1E03 initiating
G1E05 remarks, personal, relating
G1E11 6-meter, some
G2A09 commonly, accepted
G2A10 hands, free
G2A12 microphone
G2B02 acknowledge, determine, what, assistance
G2B03 attempt, resolve, problem, mutually, manner
G2B06 ask
G2B07 voluntary, plan
G2B10 backup
G2C01 characters
G2C04 busy
G2C08 ar
G2C09 understood
G2C10 troubled
G2C11 g2d, program
G2D01 formally, enlisted, airwaves, violations
G2D02 encourage, operators, self-regulate, comply
G2D03 beam, headings, locations, monitors
G2D04 true, bearings, distances
G2D05 few
G2D06 heading
G2D07 alpha, bravo, delta
G2D08 reply, requests, information
G2D09 according
G2D10 low-power
G2D11 according
G2E04 alternate
G2E06 170
G2E08 14.070
G2E09 joining, existing
G2E11 high-speed, services, community
G2E13 gateway
G2E15 14.074, 14.077
G3A05 10.7, centimeters
G3A06 disturbance
G3A09 creates, auroras, reflect
G3A10 layers, around, axis
G3B01 slightly, echo, heard
G3B04 automated, see
G3B06 reaching, destination
G3B11 ordinary, skywave
G3B12 g3c, incidence, skywave, nvis
G3C01 d
G3C05 d
G3C06 fluttering, sound
G3C07 skip, zone, paths
G3C08 skip, zone
G3C10 mf, elevation, angles
G3C11 d, g4, practices, g4a, configuration
G4A03 reducing
G4A04 dip
G4A05 drive
G4A06 transfer
G4A10 dashes
G4A11 action, distorts
G4A13 incoming
G4B02 waveforms
G4B07 non-harmonically
G4B08 linearity
G4B09 adjusting
G4B12 interferes
G4B13 coaxial
G4C02 arcing
G4C06 enclosures
G4C07 soldered, joint, destroyed, heat
G4C08 choke
G4C09 bond, enclosures, together
G4C11 enclosures, together
G4C12 hazardous, appear, chassis, g4d, processors, edges
G4D01 apparent, loudness
G4D08 7.175
G4D09 14.350
G4E01 physically
G4E02 discharge, tip
G4E04 socket’s, inadequate
G4E08 series-parallel
G4E10 discharge
G4E11 charge, g5, g5a
G5A09 ohm
G5A11 x
G5A12 g5b, decibel, dividers, calculations, root-mean-square
G5B04 2.4
G5B08 339.4
G5B10 20.6
G5B11 1.00
G5B12 245
G5B13 1060
G5B14 625
G5C02 multiplied
G5C03 5.9
G5C04 67
G5C05 accommodate
G5C07 3.5
G5C08 10.750
G5C09 33.3
G5C14 g6, g6a, rectifiers, solid-state, transistors, vacuum, tubes
G6A01 10.5
G6A02 discharge
G6A06 performance
G6A08 comparatively, cost
G6A09 channel
G6A12 grid-to-plate
G6B01 composition, mix, materials
G6B02 monolithic
G6B07 moisture-resistant
G6B08 g6b09
G6B10 current’s
G6B11 threaded, suitable, up
G6B12 rca, phono
G7A01 discharges, removed
G7A08 smaller
G7B01 self-oscillations
G7B06 clocked, passes, steps
G7B07 feedback
G7B09 tank
G7B10 preserves, waveform
G7C02 double-sideband
G7C04 extract
G7C06 wide, shapes, created
G7C10 created
G7C14 half-power
G8A01 oscillator’s, directly
G8A09 8-tone
G8A10 drive
G8A11 waveform, created, connecting
G8A12 0, 270-degrees, represent, pairs
G8A13 seen
G8B05 odd-order
G8B07 416.7
G8B08 some, cycles, rating
G8B09 results, best
G8B13 2f1-f2
G8C03 header
G8C04 5-bit
G8C05 request
G8C06 dropped
G8C08 sequences, thus
G8C09 fails, still, target, alternate
G8C10 redundant, information
G8C15 3db, 2.5
G8C16 dmr, d-star, systemfusion, g9, g9a, effects
G9A02 lossy
G9A03 450
G9A07 matched
G9A09 4:1
G9B01 carry, significant
G9B02 downward
G9B04 angles
G9B05 azimuthal, almost
G9B06 few, inches
G9B10 33
G9B11 132
G9C01 larger-diameter
G9C07 major
G9C11 shorted, stub
G9D01 1/10
G9D04 enable
G9D05 elevation
G9D06 wide
G9D07 vary
G9D09 mf
G0A01 heats
G0A04 averaged
G0A05 action
G0A08 identified
G0A10 precautions, pointed
G0A11 exceeded, occupied
G0A12 time-averaged, milliwatt, g0b, fusing, interlocks
G0B05 directly
G0B07 confirm, rated, weight, climber
G0B08 locked, tagged
G0B09 operated, well-ventilated, area
G0B10 contaminate, food, hands, washed, carefully
G0B11 together
G0B12 dangerous, removed, cabinet, opened
G0B13 enter
E1A03 14.1472
E1A04 extend, beyond
E1A05 issued, alien
E1A08 originating
E1A10 master, pilot, command
E1A11 fcc-issued
E1B01 necessary, eliminated, affecting
E1B03 mile
E1B04 mitigate
E1B05 astronomy, observatory
E1B06 notify, federal, aviation, register
E1B08 hours
E1B09 responsible, civil, defense, served
E1B11 reasonable, accommodations
E1C02 incidental, purpose, remarks, personal, nature
E1C03 after, days, told, kilometer, plc
E1C04 americas
E1C06 public, da, 16-1048
E1C07 utilities, council
E1C09 1.0
E1C10 43
E1C12 e1d
E1D01 measuring, instrument
E1D03 transmits, initiate, modify
E1D11 subject, held
E1D12 beacon
E1E01 preparing, administering
E1E02 vecs
E1E03 prepare
E1E04 confirm, meets, serve
E1E05 document
E1E06 administering
E1E07 candidate’s
E1E08 relatives, listed
E1E09 revocation, ve’s, suspension
E1E10 document
E1E11 certify, qualified, complied, administering
E1F02 terms
E1F03 constructed, modified
E1F04 canada
E1F05 430
E1F06 experimental
E1F07 neither, nor
E1F08 hire, compensation, otherwise, provided
E1F09 encoded, obscure, meaning
E1F11 satisfy, fcc’s, operated, lesser, 1500, e2, e2a, orbital, mechanics, hardware
E2A03 mixed
E2A06 define
E2A08 users
E2A09 13-centimeter
E2A11 circularly
E2A12 hold, later
E2B02 525
E2B03 odd-numbered, even-numbered
E2B04 sequentially
E2B05 fidelity
E2B07 qpsk
E2B08 shared
E2C01 indicator
E2C02 adif
E2C04 shared, various, unlicensed, services
E2C05 handle, sending, confirmations
E2C06 activity
E2C07 logs
E2C09 router, firmware
E2C11 once
E2C12 latency
E2D03 q65
E2D06 time-synchronous
E2D07 ax.25
E2D08 unnumbered
E2D09 multitone, afsk
E2D10 digipeater, hops, remaining
E2D11 e2e
E2E02 clocks
E2E03 continuous-phase
E2E07 averaged
E2E11 vfo
E2E12 constantly, scans, activating
E2E13 e3, e3a, specialized, earth-moon-earth, tropospheric, auroral, daily, variation
E3A01 12,000, visible
E3A02 fluttery
E3A04 right
E3A05 right
E3A07 bodies, water
E3A09 148
E3B01 separated, 3,000, perpendicular
E3B03 afternoon, early, evening
E3B04 independently, propagating, elliptically, created
E3B05 darkness
E3B07 covered
E3B09 summer
E3B10 experiences, multi-hop, reflector
E3B12 successive, refractions, intermediate
E3C01 flares
E3C03 auroral, oval
E3C05 southward
E3C08 g5
E3C09 digital-mode
E3C10 angstroms
E3C12 ejection
E4A04 portions
E4A05 counter's
E4A06 false, jittery, version
E4A07 compute
E4A09 probe's, connection
E4A11 e4b, measurement, instrument, probes, s
E4B02 voltmeter
E4B07 port, ports
E4B08 circuit's
E4B11 e4c, mds, selectivity, sdr, attenuators
E4C03 capture
E4C05 perfect, room
E4C07 discernible
E4C10 maximizing, minimizing
E4C11 internally, after
E4D03 mix
E4D04 terminated, circulator, repeater’s
E4D10 theoretically
E4D13 51
E4D14 picowatts, e4e, reduction, surge, protectors
E4E01 removal
E4E04 chokes, charging
E4E05 brute-force, ac-line
E4E06 appearance
E4E09 distorted
E4E11 corroded, metal, reradiating
E4E12 switch-mode
E4E14 lightning, protectors, e5a
E5A02 3.56
E5A05 decreased
E5A11 47.3
E5A12 31.4
E5B02 b
E5B05 replaced
E5D01 flows
E5D04 connection
E5D06 inter-turn
E5D07 nominal
E5D09 stored
E5D12 wattless, nonproductive, e6a, field-effect
E6A03 separated, widening
E6A04 acceptor
E6A12 e6b, diodes
E6B03 gap
E6B04 varactor
E6B06 vhf/uhf
E6B08 metal-semiconductor
E6C01 causing
E6C09 hardware, description, hdl
E6D01 stressed, flex
E6D02 representing
E6D04 eddy
E6D05 turns
E6D06 e6d07
E6D08 powdered, iron
E6D09 beads
E6D10 confine
E6E02 dip
E6E03 gallium
E6E08 and/or
E6E09 mount
E6E11 rows, connecting, sides, in-line
E6F03 phototransistor
E6F05 interrupting, patterned, wheel
E6F06 crystalline
E6F07 semiconductors, electromechanical
E6F08 switched
E6F09 fraction
E7A05 astable
E7A06 switches, temporarily
E7B01 360
E7B02 achieve
E7B04 saturation
E7B05 install, suppressors, and/or, neutralize
E7B08 saturation
E7C05 chebyshev
E7C06 stop
E7C07 pi-network
E7C08 helical
E7C10 cavity
E7D01 conduction
E7D07 bypasses, d1
E7D11 convert, panel’s
E7D12 input-to-output
E7D15 e7e, modulators, detectors, mixers
E7E03 detecting
E7E05 pre-emphasis
E7E06 compatibility
E7E07 occupied, prior
E7E08 sum
E7E10 rectification
E7F01 digitized, mixed
E7F04 combined
E7F09 high-frequency, would, otherwise, reproduced
E7F13 incremental, delays, algorithms
E7F14 taps
E7G04 bring
E7G06 open-loop
E7G12 high-gain, direct-coupled
E7H01 colpitts
E7H02 vibration
E7H03 stable
E7H06 synthesis
E7H07 isolate, enclosure
E7H13 e8, e8a, analog/digital
E8A02 successive, approximation
E8A04 small, added
E8A05 measured, sinusoidal, non-sinusoidal
E8A06 2.5
E8A08 digitizing
E8A10 artifacts
E8B05 1.67
E8B06 2.14
E8B08 chosen, intersymbol
E8B10 dividing, carry
E8B11 arranged
E8C02 convey
E8C04 sinusoidal
E8C05 52
E8C07 15.36
E8C08 retransmission
E8C09 gray
E8C10 efficient
E8C14 ip
E8C15 discovery, establishment, protocols
E8D01 algorithm, suppressed
E8D08 imd
E8D11 uppercase, lowercase
E9A01 hypothetical, lossless
E9A02 286
E9A05 environment
E9A06 317
E9A07 252
E9A08 5.8
E9A11 soil
E9A12 3.85
E9B06 7.5
E9B09 moments
E9B10 uniform
E9B11 computed, incorrect
E9C01 oriented
E9C04 increasingly, aligned
E9C05 similar
E9C08 half-wave, connecting
E9C09 open-wire
E9C10 half-wavelength
E9C12 1.25-wavelength
E9D02 perpendicular, boom
E9D04 maximize
E9D06 decreased
E9E08 equally, 50-ohm, loads, maintaining
E9E11 antenna’s
E9F02 insulating
E9F03 slowly
E9F05 plane, interconnects
E9F06 10.6
E9F12 e9g, smith, chart
E9G08 center’s
E9G09 constant-swr
E9H02 important
E9H03 hemisphere
E9H04 unbalanced, antenna’s, surroundings, nulls
E9H06 variation
E9H07 absorb
E9H10 turns, and/or, enclosed
E0A01 lightning
E0A07 lanyard, attached
E0A08 absorbed
E0A09 hand-held, sold, 2021
E0A10 evaluation, always, performed
E0A11 legs
E0A12 head