NM ES-3 EXAM SCRIPT 2026 FULL
QUESTIONS AND ACCURATE ANSWERS
GRADED A+
●● Electrical circuit.
Answer: Is comprised of an energy source, energy transfer medium and
a load.
●● Energy Transfer Medium.
Answer: copper wire, fiber optic cables and air in the case of radiated
energy
●● Load.
Answer: receives the transferred energy such as resistors, lights,
speakers, motors, etc.
●● EMF (electromotive force).
Answer: The force that moves electrical energy.
●● Current or Current Flow.
Answer: The movement of electrons through a circuit that is caused by
the electromotive force or voltage applied to the circuit.
,●● Inductance (L).
Answer: Unit is the henry. It is the property of a circuit that causes an
opposition to any change of current within the circuit. As electrons flow,
a magnetic field is produced. The magnetic force induces a change in
voltage.
●● Grounding.
Answer: assures transmission of electrical signals without interference
from electromagnetic radiation from other transmission lines and
equipment. This interference, called crosstalk, can happen from adjacent
lines, motors, PCs, lights and other devices.
●● Grounding electrode.
Answer: Connection to the electrode should be less than 1 ft below the
surface of the solid and the electrode should extend at least 10 ft below
ground.
●● Ground Loop.
Answer: Causes a current to flow in the low resistance of the shield
resulting in electromagnetic waves that are picked up as noise through
the wire.
●● 66 block.
Answer: A punchdown block that terminates 22 to 26 AWG solid copper
wire. The 25 pair standard non split 66 block contains 50 rows.
, ●● 110 block.
Answer: To terminate on-premises wiring in structured cabling. IDC or
Insulation displacement contact connector is used to terminate the
twisted pair. The 110 allows for a much higher density of terminations,
less crosstalk and higher bandwidth data.
●● UF.
Answer: Cable can be buried into the ground. Not approved for
commercial use in NM. 340.10
●● Balun.
Answer: A means of matching an unbalanced antenna or transmission
line to a balanced transmission line or antenna (Usually have a
transformer in them)
●● Bus Topology.
Answer: All nodes are connected to a single shared communication line
●● Ring Topology.
Answer: Topology where the computers are connected on a loop or ring.
●● Star Topology.
QUESTIONS AND ACCURATE ANSWERS
GRADED A+
●● Electrical circuit.
Answer: Is comprised of an energy source, energy transfer medium and
a load.
●● Energy Transfer Medium.
Answer: copper wire, fiber optic cables and air in the case of radiated
energy
●● Load.
Answer: receives the transferred energy such as resistors, lights,
speakers, motors, etc.
●● EMF (electromotive force).
Answer: The force that moves electrical energy.
●● Current or Current Flow.
Answer: The movement of electrons through a circuit that is caused by
the electromotive force or voltage applied to the circuit.
,●● Inductance (L).
Answer: Unit is the henry. It is the property of a circuit that causes an
opposition to any change of current within the circuit. As electrons flow,
a magnetic field is produced. The magnetic force induces a change in
voltage.
●● Grounding.
Answer: assures transmission of electrical signals without interference
from electromagnetic radiation from other transmission lines and
equipment. This interference, called crosstalk, can happen from adjacent
lines, motors, PCs, lights and other devices.
●● Grounding electrode.
Answer: Connection to the electrode should be less than 1 ft below the
surface of the solid and the electrode should extend at least 10 ft below
ground.
●● Ground Loop.
Answer: Causes a current to flow in the low resistance of the shield
resulting in electromagnetic waves that are picked up as noise through
the wire.
●● 66 block.
Answer: A punchdown block that terminates 22 to 26 AWG solid copper
wire. The 25 pair standard non split 66 block contains 50 rows.
, ●● 110 block.
Answer: To terminate on-premises wiring in structured cabling. IDC or
Insulation displacement contact connector is used to terminate the
twisted pair. The 110 allows for a much higher density of terminations,
less crosstalk and higher bandwidth data.
●● UF.
Answer: Cable can be buried into the ground. Not approved for
commercial use in NM. 340.10
●● Balun.
Answer: A means of matching an unbalanced antenna or transmission
line to a balanced transmission line or antenna (Usually have a
transformer in them)
●● Bus Topology.
Answer: All nodes are connected to a single shared communication line
●● Ring Topology.
Answer: Topology where the computers are connected on a loop or ring.
●● Star Topology.
