ES3 NM QUESTIONS WITH CORRECT
ANSWERS 2025
Wiring System - CORRECT ANSWER -Is a form of electrical circuit.
Electrical circuit - CORRECT ANSWER -
Is comprised of an energy source, energy transfer medium and a load.
Energy Transfer Medium - CORRECT ANSWER -
copper wire, fiber optic cables and air in the case of radiated energy
Load - CORRECT ANSWER -
receives the transferred energy such as resistors, lights, speakers, motors, etc.
EMF (electromotive force) - CORRECT ANSWER -The force that moves electrical energy.
Current or Current Flow - CORRECT ANSWER -
The movement of electrons through a circuit that is caused by the electromotive force or voltage a
pplied to the circuit.
Inductance (L) - CORRECT 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 c
hange in voltage.
Grounding - CORRECT ANSWER -
assures transmission of electrical signals without interference from electromagnetic radiation from o
ther transmission lines and equipment. This interference, called crosstalk, can happen from adjacen
t lines, motors, PCs, lights and other devices.
Grounding electrode - CORRECT ANSWER -
Connection to the electrode should be less than 1 ft below the surface of the solid and the electr
ode should extend at least 10 ft below ground.
, Ground Loop - CORRECT 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 - CORRECT ANSWER -
A punchdown block that terminates 22 to 26 AWG solid copper wire. The 25 pair standard non spl
it 66 block contains 50 rows.
110 block - CORRECT ANSWER -To terminate on-
premises wiring in structured cabling. IDC or Insulation displacement contact connector is used to t
erminate the twisted pair. The 110 allows for a much higher density of terminations, less crosstalk
and higher bandwidth data.
UF - CORRECT ANSWER -
Cable can be buried into the ground. Not approved for commercial use in NM. 340.10
Balun - CORRECT ANSWER -
A means of matching an unbalanced antenna or transmission line to a balanced transmission line o
r antenna (Usually have a transformer in them)
Bus Topology - CORRECT ANSWER -All nodes are connected to a single shared communication line
Ring Topology - CORRECT ANSWER -
Topology where the computers are connected on a loop or ring.
Star Topology - CORRECT ANSWER -
A topology with one central node that has each computer or network device attached to the centr
al node. All data first goes into the central node and then is sent out to its destination.
Transducer - CORRECT ANSWER -A device that converts energy from one form to another
Crossover - CORRECT ANSWER -
Divide an output into separate circuits each covering a specific band or frequency range.
ANSWERS 2025
Wiring System - CORRECT ANSWER -Is a form of electrical circuit.
Electrical circuit - CORRECT ANSWER -
Is comprised of an energy source, energy transfer medium and a load.
Energy Transfer Medium - CORRECT ANSWER -
copper wire, fiber optic cables and air in the case of radiated energy
Load - CORRECT ANSWER -
receives the transferred energy such as resistors, lights, speakers, motors, etc.
EMF (electromotive force) - CORRECT ANSWER -The force that moves electrical energy.
Current or Current Flow - CORRECT ANSWER -
The movement of electrons through a circuit that is caused by the electromotive force or voltage a
pplied to the circuit.
Inductance (L) - CORRECT 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 c
hange in voltage.
Grounding - CORRECT ANSWER -
assures transmission of electrical signals without interference from electromagnetic radiation from o
ther transmission lines and equipment. This interference, called crosstalk, can happen from adjacen
t lines, motors, PCs, lights and other devices.
Grounding electrode - CORRECT ANSWER -
Connection to the electrode should be less than 1 ft below the surface of the solid and the electr
ode should extend at least 10 ft below ground.
, Ground Loop - CORRECT 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 - CORRECT ANSWER -
A punchdown block that terminates 22 to 26 AWG solid copper wire. The 25 pair standard non spl
it 66 block contains 50 rows.
110 block - CORRECT ANSWER -To terminate on-
premises wiring in structured cabling. IDC or Insulation displacement contact connector is used to t
erminate the twisted pair. The 110 allows for a much higher density of terminations, less crosstalk
and higher bandwidth data.
UF - CORRECT ANSWER -
Cable can be buried into the ground. Not approved for commercial use in NM. 340.10
Balun - CORRECT ANSWER -
A means of matching an unbalanced antenna or transmission line to a balanced transmission line o
r antenna (Usually have a transformer in them)
Bus Topology - CORRECT ANSWER -All nodes are connected to a single shared communication line
Ring Topology - CORRECT ANSWER -
Topology where the computers are connected on a loop or ring.
Star Topology - CORRECT ANSWER -
A topology with one central node that has each computer or network device attached to the centr
al node. All data first goes into the central node and then is sent out to its destination.
Transducer - CORRECT ANSWER -A device that converts energy from one form to another
Crossover - CORRECT ANSWER -
Divide an output into separate circuits each covering a specific band or frequency range.
