Ham Radio - Technician Class -
Question Pool 2025/2026 Exam
Questions and Corresponding Answers
with Surety of 100% Pass Mark
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 - 🧠 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 -
🧠 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 - 🧠 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
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,of overload C. To limit current to prevent shocks D. All of these choices are
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 - 🧠
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 - 🧠 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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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,connected to station ground D. Ground all of the protectors to a common
plate which is in turn connected to an external ground - 🧠 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 - 🧠 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 - 🧠 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 - 🧠 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
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
, in the ground wires are clean, right angle bends C. Ensure that connections
are short and direct D. All of these choices are 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 - 🧠 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 - 🧠 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 - 🧠 ANSWER ✔✔(C)
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
Question Pool 2025/2026 Exam
Questions and Corresponding Answers
with Surety of 100% Pass Mark
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 - 🧠 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 -
🧠 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 - 🧠 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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,of overload C. To limit current to prevent shocks D. All of these choices are
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 - 🧠
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 - 🧠 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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
,connected to station ground D. Ground all of the protectors to a common
plate which is in turn connected to an external ground - 🧠 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 - 🧠 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 - 🧠 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 - 🧠 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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
, in the ground wires are clean, right angle bends C. Ensure that connections
are short and direct D. All of these choices are 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 - 🧠 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 - 🧠 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 - 🧠 ANSWER ✔✔(C)
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
