Ham Radio Technician Class Exam 2024 |
Ham Radio Technician Class Pool Actual
Exam 2024 Questions and Correct Answers
Rated A+
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 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 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 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)
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 - 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 -
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 - 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 - 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 - 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 - ANSWER-(C)
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