HAM EXTRA TEST QUESTIONS & ANSWERS 2025
E1A01-Which of the following carrier frequencies is illegal for LSB AFSK emissions on
the 17 meter band RTTY and data segment of 18.068 to 18.110 MHz? - Answers -
18.068 MHz
E3B10-Why is chordal hop propagation desirable? - Answers - The signal experiences
less loss compared to multi-hop using Earth as a reflector
E1A08-If a station in a message forwarding system inadvertently forwards a message
that is in violation of FCC rules, who is primarily accountable for the rules violation? -
Answers - The control operator of the originating station
E3C13-What type of polarization is best for ground-wave propagation? - Answers -
Vertical
E1A10-If an amateur station is installed aboard a ship or aircraft, what condition must
be met before the station is operated? - Answers - Its operation must be approved by
the master of the ship or the pilot in command of the aircraft
E3C01-What does the radio communication term "ray tracing" describe? - Answers -
Modeling a radio wave's path through the ionosphere
E3C14-Why does the radio-path horizon distance exceed the geometric horizon? -
Answers - Downward bending due to density variations in the atmosphere
E3C06-By how much does the VHF/UHF radio horizon distance exceed the geometric
horizon? - Answers - By approximately 15 percent of the distance
E1B03-Within what distance must an amateur station protect an FCC monitoring facility
from harmful interference? - Answers - 1 mile
E3C10-What does the 304A solar parameter measure? - Answers - UV emissions at
304 angstroms, correlated to the solar flux index
E1B05-What is the National Radio Quiet Zone? - Answers - An area surrounding the
National Radio Astronomy Observatory
E1B06-Which of the following additional rules apply if you are installing an amateur
station antenna at a site at or near a public use airport? - Answers - You may have to
notify the Federal Aviation Administration and register it with the FCC as required by
Part 17 of the FCC rules
,E4A03- Which of the following test instruments is used to display spurious signals
and/or intermodulation distortion products generated by an SSB transmitter? - Answers
- A spectrum analyzer
E1B08-What limitations may the FCC place on an amateur station if its signal causes
interference to domestic broadcast reception, assuming that the receivers involved are
of good engineering design? - Answers - The amateur station must avoid transmitting
during certain hours on frequencies that cause the interference
E4A02 -Which of the following parameters does a spectrum analyzer display on the
vertical and horizontal axes? - Answers - RF amplitude and frequency
E1B10-What frequencies are authorized to an amateur station operating under RACES
rules? - Answers - All amateur service frequencies authorized to the control operator
E1A11-Which of the following describes authorization or licensing required when
operating an amateur station aboard a U.S.-registered vessel in international waters? -
Answers - Any FCC-issued amateur license
E3B12-What is the primary characteristic of chordal hop propagation? - Answers -
Successive ionospheric refractions without an intermediate reflection from the ground
E1A13-Who must be in physical control of the station apparatus of an amateur station
aboard any vessel or craft that is documented or registered in the United States? -
Answers - Any person holding an FCC issued amateur license or who is authorized for
alien reciprocal operation
E4A04-How is the compensation of an oscilloscope probe typically adjusted? - Answers
- A square wave is displayed and the probe is adjusted until the horizontal portions of
the displayed wave are as nearly flat as possible
E4A05-What is the purpose of the prescaler function on a frequency counter? - Answers
- It divides a higher frequency signal so a low-frequency counter can display the input
frequency
E4A08-Which of the following measures SWR? - Answers - An antenna analyzer
E3B05-Which amateur bands typically support long-path propagation? - Answers - 160
meters to 10 meters
E1C03-How do the control operator responsibilities of a station under automatic control
differ from one under local control? - Answers - Under automatic control the control
operator is not required to be present at the control point
E4B01-Which of the following factors most affects the accuracy of a frequency counter?
- Answers - Time base accuracy
, E1C05-When may an automatically controlled station originate third party
communications? - Answers - never
E1C06-Which of the following is required in order to operate in accordance with CEPT
rules in foreign countries where permitted? - Answers - You must bring a copy of FCC
Public Notice DA 16-1048
E1C07-At what level below a signal's mean power level is its bandwidth determined
according to FCC rules? - Answers - 26 dB
E4B03-Which S parameter is equivalent to forward gain? - Answers - S21
E3B06-Which of the following amateur bands most frequently provides long-path
propagation? - Answers - 20 meters
E1C10-What is the permitted mean power of any spurious emission relative to the mean
power of the fundamental emission from a station transmitter or external RF amplifier
installed after January 1, 2003 and transmitting on a frequency below 30 MHz? -
Answers - At least 43 dB below
E4B05-What three test loads are used to calibrate an RF vector network analyzer? -
Answers - Short circuit, open circuit, and 50 ohms
E4B08-Which of the following can be used to measure the Q of a series-tuned circuit? -
Answers - The bandwidth of the circuit's frequency response
E4B09-What is indicated if the current reading on an RF ammeter placed in series with
the antenna feed line of a transmitter increases as the transmitter is tuned to
resonance? - Answers - There is more power going into the antenna
E4C02-Which of the following receiver circuits can be effective in eliminating
interference from strong out-of-band signals? - Answers - A front-end filter or pre-
selector
E4C04-What is the noise figure of a receiver? - Answers - The ratio in dB of the noise
generated by the receiver to the theoretical minimum noise.
E1D01-What is the definition of telemetry? - Answers - One-way transmission of
measurements at a distance from the measuring instrument.
E1D03-What is a space telecommand station? - Answers - An amateur station that
transmits communications to initiate, modify or terminate functions of a space station.
E1D04-Which of the following is required in the identification transmissions from a
balloon-borne telemetry station? - Answers - Call sign
E1A01-Which of the following carrier frequencies is illegal for LSB AFSK emissions on
the 17 meter band RTTY and data segment of 18.068 to 18.110 MHz? - Answers -
18.068 MHz
E3B10-Why is chordal hop propagation desirable? - Answers - The signal experiences
less loss compared to multi-hop using Earth as a reflector
E1A08-If a station in a message forwarding system inadvertently forwards a message
that is in violation of FCC rules, who is primarily accountable for the rules violation? -
Answers - The control operator of the originating station
E3C13-What type of polarization is best for ground-wave propagation? - Answers -
Vertical
E1A10-If an amateur station is installed aboard a ship or aircraft, what condition must
be met before the station is operated? - Answers - Its operation must be approved by
the master of the ship or the pilot in command of the aircraft
E3C01-What does the radio communication term "ray tracing" describe? - Answers -
Modeling a radio wave's path through the ionosphere
E3C14-Why does the radio-path horizon distance exceed the geometric horizon? -
Answers - Downward bending due to density variations in the atmosphere
E3C06-By how much does the VHF/UHF radio horizon distance exceed the geometric
horizon? - Answers - By approximately 15 percent of the distance
E1B03-Within what distance must an amateur station protect an FCC monitoring facility
from harmful interference? - Answers - 1 mile
E3C10-What does the 304A solar parameter measure? - Answers - UV emissions at
304 angstroms, correlated to the solar flux index
E1B05-What is the National Radio Quiet Zone? - Answers - An area surrounding the
National Radio Astronomy Observatory
E1B06-Which of the following additional rules apply if you are installing an amateur
station antenna at a site at or near a public use airport? - Answers - You may have to
notify the Federal Aviation Administration and register it with the FCC as required by
Part 17 of the FCC rules
,E4A03- Which of the following test instruments is used to display spurious signals
and/or intermodulation distortion products generated by an SSB transmitter? - Answers
- A spectrum analyzer
E1B08-What limitations may the FCC place on an amateur station if its signal causes
interference to domestic broadcast reception, assuming that the receivers involved are
of good engineering design? - Answers - The amateur station must avoid transmitting
during certain hours on frequencies that cause the interference
E4A02 -Which of the following parameters does a spectrum analyzer display on the
vertical and horizontal axes? - Answers - RF amplitude and frequency
E1B10-What frequencies are authorized to an amateur station operating under RACES
rules? - Answers - All amateur service frequencies authorized to the control operator
E1A11-Which of the following describes authorization or licensing required when
operating an amateur station aboard a U.S.-registered vessel in international waters? -
Answers - Any FCC-issued amateur license
E3B12-What is the primary characteristic of chordal hop propagation? - Answers -
Successive ionospheric refractions without an intermediate reflection from the ground
E1A13-Who must be in physical control of the station apparatus of an amateur station
aboard any vessel or craft that is documented or registered in the United States? -
Answers - Any person holding an FCC issued amateur license or who is authorized for
alien reciprocal operation
E4A04-How is the compensation of an oscilloscope probe typically adjusted? - Answers
- A square wave is displayed and the probe is adjusted until the horizontal portions of
the displayed wave are as nearly flat as possible
E4A05-What is the purpose of the prescaler function on a frequency counter? - Answers
- It divides a higher frequency signal so a low-frequency counter can display the input
frequency
E4A08-Which of the following measures SWR? - Answers - An antenna analyzer
E3B05-Which amateur bands typically support long-path propagation? - Answers - 160
meters to 10 meters
E1C03-How do the control operator responsibilities of a station under automatic control
differ from one under local control? - Answers - Under automatic control the control
operator is not required to be present at the control point
E4B01-Which of the following factors most affects the accuracy of a frequency counter?
- Answers - Time base accuracy
, E1C05-When may an automatically controlled station originate third party
communications? - Answers - never
E1C06-Which of the following is required in order to operate in accordance with CEPT
rules in foreign countries where permitted? - Answers - You must bring a copy of FCC
Public Notice DA 16-1048
E1C07-At what level below a signal's mean power level is its bandwidth determined
according to FCC rules? - Answers - 26 dB
E4B03-Which S parameter is equivalent to forward gain? - Answers - S21
E3B06-Which of the following amateur bands most frequently provides long-path
propagation? - Answers - 20 meters
E1C10-What is the permitted mean power of any spurious emission relative to the mean
power of the fundamental emission from a station transmitter or external RF amplifier
installed after January 1, 2003 and transmitting on a frequency below 30 MHz? -
Answers - At least 43 dB below
E4B05-What three test loads are used to calibrate an RF vector network analyzer? -
Answers - Short circuit, open circuit, and 50 ohms
E4B08-Which of the following can be used to measure the Q of a series-tuned circuit? -
Answers - The bandwidth of the circuit's frequency response
E4B09-What is indicated if the current reading on an RF ammeter placed in series with
the antenna feed line of a transmitter increases as the transmitter is tuned to
resonance? - Answers - There is more power going into the antenna
E4C02-Which of the following receiver circuits can be effective in eliminating
interference from strong out-of-band signals? - Answers - A front-end filter or pre-
selector
E4C04-What is the noise figure of a receiver? - Answers - The ratio in dB of the noise
generated by the receiver to the theoretical minimum noise.
E1D01-What is the definition of telemetry? - Answers - One-way transmission of
measurements at a distance from the measuring instrument.
E1D03-What is a space telecommand station? - Answers - An amateur station that
transmits communications to initiate, modify or terminate functions of a space station.
E1D04-Which of the following is required in the identification transmissions from a
balloon-borne telemetry station? - Answers - Call sign
