ES3 NM QUESTIONS WITH CORRECT ANSWERS

ES3 NM QUESTIONS WITH CORRECT
ANSWERS 2026-2027
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 - X 2 X 2 X 2 X 2 X 2




Causes a current to flow in the low resistance of the shield resulting in electromagnetic waves t
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




hat are picked up as noise through the wire.
X2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




66 block - CORRECT ANSWER -
X 2 X 2 X 2 X 2 X 2




A punchdown block that terminates 22 to 26 AWG solid copper wire. The 25 pair standard non
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X




spl it 66 block contains 50 rows.
2 X2 X 2 X 2 X 2 X 2 X 2




110 block - CORRECT ANSWER -To terminate on-
X 2 X 2 X 2 X 2 X 2 X 2 X 2




premises wiring in structured cabling. IDC or Insulation displacement contact connector is used t
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




o t erminate the twisted pair. The 110 allows for a much higher density of terminations, less cr
X 2 X2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




osstalk and higher bandwidth data. X2 X 2 X 2 X 2




UF - CORRECT ANSWER -
X 2 X 2 X 2 X 2




Cable can be buried into the ground. Not approved for commercial use in NM. 340.10
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




Balun - CORRECT ANSWER - X 2 X 2 X 2 X 2




A means of matching an unbalanced antenna or transmission line to a balanced transmission lin
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




e o r antenna (Usually have a transformer in them)
X 2 X2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




Bus Topology - CORRECT ANSWER -All nodes are connected to a single shared communication line
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




Ring Topology - CORRECT ANSWER -
X 2 X 2 X 2 X 2 X 2




Topology where the computers are connected on a loop or ring.
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




Star Topology - CORRECT ANSWER -
X 2 X 2 X 2 X 2 X 2




A topology with one central node that has each computer or network device attached to the ce
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




ntr al node. All data first goes into the central node and then is sent out to its destination.
X2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




Transducer - CORRECT ANSWER -A device that converts energy from one form to another
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2




Crossover - CORRECT ANSWER - X 2 X 2 X 2 X 2




Divide an output into separate circuits each covering a specific band or frequency range.
X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2 X 2