Ham Radio - Technician Class UPDATED Exam Questions and CORRECT Answers
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Course
Ham Radio - Technician Class
Institution
Ham Radio - Technician Class
Ham Radio - Technician Class UPDATED
Exam Questions and CORRECT Answers
T0A01 Which is a commonly accepted value for the lowest voltage that can cause a
dangerous electric shock? A. 12 volts B. 30 volts C. 120 volts D. 300 volts - CORRECT
ANSWER- (B)
T0A02 How does current flowing through t...
Ham Radio - Technician Class UPDATED
Exam Questions and CORRECT Answers
T0A01 Which is a commonly accepted value for the lowest voltage that can cause a
dangerous electric shock? A. 12 volts B. 30 volts C. 120 volts D. 300 volts - CORRECT
ANSWER- (B)
T0A02 How does current flowing through the body cause a health hazard? A. By heating
tissue B. It disrupts the electrical functions of cells C. It causes involuntary muscle
contractions D. All of these choices are correct - CORRECT ANSWER- (D)
T0A03 What is connected to the green wire in a three-wire electrical AC plug? A. Neutral B.
Hot C. Safety ground D. The white wire - CORRECT ANSWER- (C)
T0A04 What is the purpose of a fuse in an electrical circuit? A. To prevent power supply
ripple from damaging a circuit B. To interrupt power in case of overload C. To limit current
to prevent shocks D. All of these choices are correct - CORRECT ANSWER- (B)
T0A05 Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse? A. The
larger fuse would be likely to blow because it is rated for higher current B. The power supply
ripple would greatly increase C. Excessive current could cause a fire D. All of these choices
are correct - CORRECT ANSWER- (C)
T0A06 What is a good way to guard against electrical shock at your station? A. Use three-
wire cords and plugs for all AC powered equipment B. Connect all AC powered station
equipment to a common safety ground C. Use a circuit protected by a ground-fault interrupter
D. All of these choices are correct - CORRECT ANSWER- (D)
T0A07 Which of these precautions should be taken when installing devices for lightning
protection in a coaxial cable feedline? A. Include a parallel bypass switch for each protector
so that it can be switched out of the circuit when running high power B. Include a series
switch in the ground line of each protector to prevent RF overload from inadvertently
damaging the protector C. Keep the ground wires from each protector separate and connected
to station ground D. Ground all of the protectors to a common plate which is in turn
connected to an external ground - CORRECT ANSWER- (D)
,T0A08 What is one way to recharge a 12-volt lead-acid station battery if the commercial
power is out? A. Cool the battery in ice for several hours B. Add acid to the battery C.
Connect the battery to a car's battery and run the engine D. All of these choices are correct -
CORRECT ANSWER- (C)
T0A09 What kind of hazard is presented by a conventional 12-volt storage battery? A. It
emits ozone which can be harmful to the atmosphere B. Shock hazard due to high voltage C.
Explosive gas can collect if not properly vented D. All of these choices are correct -
CORRECT ANSWER- (C)
T0A10 What can happen if a lead-acid storage battery is charged or discharged too quickly?
A. The battery could overheat and give off flammable gas or explode B. The voltage can
become reversed C. The "memory effect" will reduce the capacity of the battery D. All of
these choices are correct - CORRECT ANSWER- (A)
T0A11 Which of the following is good practice when installing ground wires on a tower for
lightning protection? A. Put a loop in the ground connection to prevent water damage to the
ground system B. Make sure that all bends in the ground wires are clean, right angle bends C.
Ensure that connections are short and direct D. All of these choices are correct - CORRECT
ANSWER- (C)
T0A12 What kind of hazard might exist in a power supply when it is turned off and
disconnected? A. Static electricity could damage the grounding system B. Circulating
currents inside the transformer might cause damage C. The fuse might blow if you remove
the cover D. You might receive an electric shock from stored charge in large capacitors -
CORRECT ANSWER- (D)
T0A13 What safety equipment should always be included in home-built equipment that is
powered from 120V AC power circuits? A. A fuse or circuit breaker in series with the AC
"hot" conductor B. An AC voltmeter across the incoming power source C. An inductor in
series with the AC power source D. A capacitor across the AC power source - CORRECT
ANSWER- (A)
T0B01 When should members of a tower work team wear a hard hat and safety glasses? A.
At all times except when climbing the tower B. At all times except when belted firmly to the
tower C. At all times when any work is being done on the tower D. Only when the tower
exceeds 30 feet in height - CORRECT ANSWER- (C)
,T0B02 What is a good precaution to observe before climbing an antenna tower? A. Make
sure that you wear a grounded wrist strap B. Remove all tower grounding connections C. Put
on a climbing harness and safety glasses D. All of the these choices are correct - CORRECT
ANSWER- (C)
T0B03 Under what circumstances is it safe to climb a tower without a helper or observer? A.
When no electrical work is being performed B. When no mechanical work is being performed
C. When the work being done is not more than 20 feet above the ground D. Never -
CORRECT ANSWER- (D)
T0B04 Which of the following is an important safety precaution to observe when putting up
an antenna tower? A. Wear a ground strap connected to your wrist at all times B. Insulate the
base of the tower to avoid lightning strikes C. Look for and stay clear of any overhead
electrical wires D. All of these choices are correct - CORRECT ANSWER- (C)
T0B05 What is the purpose of a gin pole? A. To temporarily replace guy wires B. To be used
in place of a safety harness C. To lift tower sections or antennas D. To provide a temporary
ground - CORRECT ANSWER- (C)
T0B06 What is the minimum safe distance from a power line to allow when installing an
antenna? A. Half the width of your property B. The height of the power line above ground C.
1/2 wavelength at the operating frequency D. So that if the antenna falls unexpectedly, no
part of it can come closer than 10 feet to the power wires - CORRECT ANSWER- (D)
T0B07 Which of the following is an important safety rule to remember when using a crank-
up tower? A. This type of tower must never be painted B. This type of tower must never be
grounded C. This type of tower must never be climbed unless it is in the fully retracted
position D. All of these choices are correct - CORRECT ANSWER- (C)
T0B08 What is considered to be a proper grounding method for a tower? A. A single four-
foot ground rod, driven into the ground no more than 12 inches from the base B. A ferrite-
core RF choke connected between the tower and ground C. Separate eight-foot long ground
rods for each tower leg, bonded to the tower and each other D. A connection between the
tower base and a cold water pipe - CORRECT ANSWER- (C)
T0B09 Why should you avoid attaching an antenna to a utility pole? A. The antenna will not
work properly because of induced voltages B. The utility company will charge you an extra
monthly fee C. The antenna could contact high-voltage power wires D. All of these choices
are correct - CORRECT ANSWER- (C)
, T0B10 Which of the following is true concerning grounding conductors used for lightning
protection? A. Only non-insulated wire must be used B. Wires must be carefully routed with
precise right-angle bends C. Sharp bends must be avoided D. Common grounds must be
avoided - CORRECT ANSWER- (C)
T0B11 Which of the following establishes grounding requirements for an amateur radio
tower or antenna? A. FCC Part 97 Rules B. Local electrical codes C. FAA tower lighting
regulations D. Underwriters Laboratories' recommended practices - CORRECT ANSWER-
(B)
T0C01 What type of radiation are VHF and UHF radio signals? A. Gamma radiation B.
Ionizing radiation C. Alpha radiation D. Non-ionizing radiation - CORRECT ANSWER- (D)
T0C02 Which of the following frequencies has the lowest Maximum Permissible Exposure
limit? A. 3.5 MHz B. 50 MHz C. 440 MHz D. 1296 MHz - CORRECT ANSWER- (B)
T0C03 What is the maximum power level that an amateur radio station may use at VHF
frequencies before an RF exposure evaluation is required? A. 1500 watts PEP transmitter
output B. 1 watt forward power C. 50 watts PEP at the antenna D. 50 watts PEP reflected
power - CORRECT ANSWER- (C)
T0C04 What factors affect the RF exposure of people near an amateur station antenna? A.
Frequency and power level of the RF field B. Distance from the antenna to a person C.
Radiation pattern of the antenna D. All of these choices are correct - CORRECT ANSWER-
(D)
T0C05 Why do exposure limits vary with frequency? A. Lower frequency RF fields have
more energy than higher frequency fields B. Lower frequency RF fields do not penetrate the
human body C. Higher frequency RF fields are transient in nature D. The human body
absorbs more RF energy at some frequencies than at others - CORRECT ANSWER- (D)
T0C06 Which of the following is an acceptable method to determine that your station
complies with FCC RF exposure regulations? A. By calculation based on FCC OET Bulletin
65 B. By calculation based on computer modeling C. By measurement of field strength using
calibrated equipment D. All of these choices are correct - CORRECT ANSWER- (D)
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