2026-2027 ACTUAL COMPLETE REAL EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) ALREADY
GRADED A+ | GUARANTEED SUCCESS!! NEWEST EXAM | JUST
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what is the unit of an alternating-current frequency? - ANSWER
-hertz
define the power factor of an alternating-current curcuit -
ANSWER -the ratio of
the actual power to the product of volts times
amperes
PF=watts/VoltsxAmperes
describe the theory of operation of an electric transformer -
ANSWER -voltage
must be stepped up and then must be stepped down. the
transformer is the
apparatus used to make these
changes
describe a typical electric system - ANSWER -powerplant,
transmission,
transmission lines, substation,
distribution
,what is a transmission line? - ANSWER -a set of conductors
energized at over
69,000 volts and transmitting large blocks of electrical
energy over relatively
long
distances
how do voltage levels of transmission, subtransmision, and
distribution differ? -
ANSWER -transmission circuits: 69kv-765kv,
subtransmission
when is a direct current transmission line used? - ANSWER -
to transmit large
amounts of power over long distances or to interconnect two
AC systems that
are not
synchronized
list of functions that can be accomplished in an electric
substation - ANSWER -
switch generators, equipment, and circuits or lines in/out of the
system, change
AC voltage from on level to another, or changing AC-
>DC or DC->AC
list the component parts of the electrical distribution system -
ANSWER -(1) distribution substation, (2) distribution feeder
circuits, (3) switches, (4) protective equipment, (5) primary
, circuits, (6) distribution transformers, (7) secondaries, and (8)
services
describe a traditional distribution feeder circuit - ANSWER -
serve as a source to
branch or primary circuits and are often referred to as
distribution main-feeder
or express feeder
circuits
what is a primary circuit? - ANSWER -distribution circuits
greater than 600 volts
up to 69,00 volts are often referred to as primaries
by lineman
what is the purpose of a distribution transformer? - ANSWER -
to reduce voltage
of the primary circuit to the utilization voltage required to
supply the customer
describe an electrical service - ANSWER -the wire extending
from the distribution transformer, adjacent to the customers
property to the customers premises are called a service
what is the purpose of an electric substation - ANSWER -an
electrical substation is an installation with electrical equipment
capable of interrupting or establishing electrical circuits and
changing voltage, frequency, or other characteristics of the
electrical energy flowing in the circuits