Master Electrical Closed Book
Exam Questions 2026 Exam All
Answers and Illustrations
Given
XC - ANSWER ✔✔______ is the letter(s) used to indicate capacitive
reactance in a circuit.
A) XL, B) Z, C) HZ, D) XC
Conductors drawn from a copper-clad aluminum rod with the copper
metallurgically bonded to an aluminum core. The copper forms a
minimum of ________ percent of the csa. - ANSWER ✔✔10
,Relay contacts are made of ___________. - ANSWER ✔✔Silver
Defined apparatus - ANSWER ✔✔The organization or system used
for doing or operating something
Operation of equipment in excess of normal, full-load rating, or of a
conductor in excess of a rated capacity which, when it persists for a
sufficient length of time, would cause damage or dangerous overheating
is called __________. - ANSWER ✔✔An overload
In an AC circuit a value of watts divided by a value of volt-amps, what
should the power factor be to indicate close to unity? - ANSWER ✔✔(
high power factor) = having a high power factor, tells you, that the
POWER FACTOR is close to unity(1.0). Which is what you want in a
circuit. Because that means that the power is IN PHASE and this is
called TRUE POWER. We don't want to have a low power factor,
because that means the circuit power is OUT OF PHASE , meaning that
you have to much inductance or capacitance, which is called
APPARENT POWER.
A transformer core is made of_________. - ANSWER ✔✔Steel
Flexible metal conduit shall be secured by an proved means at intervals
not exceeding ___________ feet and within 12" on each side of every
outlet box , junction box, cabinet, or fitting. - ANSWER ✔✔4 1/2
,An insulated conductor with a white or gray finish shall be permitted as
_________ or _______ conductor where permanently reidentified to
indicate its use, by painting or other effective means at its termination
and at each location where the conductor is visible and accessible -
ANSWER ✔✔Hot or ungrounded
If the DC resistance of a #500 kcmil copper conductor 1000 feet in
length is .0258 ohm, the DC resistance for a #1000 kcmil copper
conductor 1000 feet in length would be ________ ohm. - ANSWER
✔✔0.0129, is because if you double the cross-sectional area (csa) of a
conductor it will reduce the resistance by 1/2. .0258/2= .0129
Metal cabinets used for lighting circuit are grounded in order to
_________or ______. - ANSWER ✔✔Limit the voltage to ground or
facilitate overcurrent device operation
Encased with a material or composition or thickness that is not
recognized by the code as electrical insulation is defined as a covered
______. - ANSWER ✔✔Conductor
A overcurrent trip unit of a circuit breaker shall be connected in series
with each _____. - ANSWER ✔✔Ungrounded conductor
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, Receptacle outlets in a residence shall be installed so that no point
along the floor line in any wall space is ______,measured horizontally,
from an outlet in that space. - ANSWER ✔✔More than 6'
In a 2-wire, 120v circuit, the black wire (hot) is a _______ conductor and
the white wire is a ______ conductor. - ANSWER ✔✔Ungrounded,
grounded
Grounding conductor shall not be connected by_______. - ANSWER
✔✔Soldered fittings
You have 120v at the panel and 115v at the load. What is the percentage
of voltage drop? - ANSWER ✔✔4.17%, (120v-115v=5v), you take the
difference which is 5v, and divide it by your original voltage 120v,
5v/120v=.0417, 4.17%
The ampacity of a solid or stranded conductor of the same material is
the same if it has the same _________. - ANSWER ✔✔Insulation
The_______ is the service conductors between the terminals of the
service equipment and a point usually outside the building, clear of
building walls, where joined by tap or splice to the service drop. -
ANSWER ✔✔Service entrance conductors, overhead system
Exam Questions 2026 Exam All
Answers and Illustrations
Given
XC - ANSWER ✔✔______ is the letter(s) used to indicate capacitive
reactance in a circuit.
A) XL, B) Z, C) HZ, D) XC
Conductors drawn from a copper-clad aluminum rod with the copper
metallurgically bonded to an aluminum core. The copper forms a
minimum of ________ percent of the csa. - ANSWER ✔✔10
,Relay contacts are made of ___________. - ANSWER ✔✔Silver
Defined apparatus - ANSWER ✔✔The organization or system used
for doing or operating something
Operation of equipment in excess of normal, full-load rating, or of a
conductor in excess of a rated capacity which, when it persists for a
sufficient length of time, would cause damage or dangerous overheating
is called __________. - ANSWER ✔✔An overload
In an AC circuit a value of watts divided by a value of volt-amps, what
should the power factor be to indicate close to unity? - ANSWER ✔✔(
high power factor) = having a high power factor, tells you, that the
POWER FACTOR is close to unity(1.0). Which is what you want in a
circuit. Because that means that the power is IN PHASE and this is
called TRUE POWER. We don't want to have a low power factor,
because that means the circuit power is OUT OF PHASE , meaning that
you have to much inductance or capacitance, which is called
APPARENT POWER.
A transformer core is made of_________. - ANSWER ✔✔Steel
Flexible metal conduit shall be secured by an proved means at intervals
not exceeding ___________ feet and within 12" on each side of every
outlet box , junction box, cabinet, or fitting. - ANSWER ✔✔4 1/2
,An insulated conductor with a white or gray finish shall be permitted as
_________ or _______ conductor where permanently reidentified to
indicate its use, by painting or other effective means at its termination
and at each location where the conductor is visible and accessible -
ANSWER ✔✔Hot or ungrounded
If the DC resistance of a #500 kcmil copper conductor 1000 feet in
length is .0258 ohm, the DC resistance for a #1000 kcmil copper
conductor 1000 feet in length would be ________ ohm. - ANSWER
✔✔0.0129, is because if you double the cross-sectional area (csa) of a
conductor it will reduce the resistance by 1/2. .0258/2= .0129
Metal cabinets used for lighting circuit are grounded in order to
_________or ______. - ANSWER ✔✔Limit the voltage to ground or
facilitate overcurrent device operation
Encased with a material or composition or thickness that is not
recognized by the code as electrical insulation is defined as a covered
______. - ANSWER ✔✔Conductor
A overcurrent trip unit of a circuit breaker shall be connected in series
with each _____. - ANSWER ✔✔Ungrounded conductor
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, Receptacle outlets in a residence shall be installed so that no point
along the floor line in any wall space is ______,measured horizontally,
from an outlet in that space. - ANSWER ✔✔More than 6'
In a 2-wire, 120v circuit, the black wire (hot) is a _______ conductor and
the white wire is a ______ conductor. - ANSWER ✔✔Ungrounded,
grounded
Grounding conductor shall not be connected by_______. - ANSWER
✔✔Soldered fittings
You have 120v at the panel and 115v at the load. What is the percentage
of voltage drop? - ANSWER ✔✔4.17%, (120v-115v=5v), you take the
difference which is 5v, and divide it by your original voltage 120v,
5v/120v=.0417, 4.17%
The ampacity of a solid or stranded conductor of the same material is
the same if it has the same _________. - ANSWER ✔✔Insulation
The_______ is the service conductors between the terminals of the
service equipment and a point usually outside the building, clear of
building walls, where joined by tap or splice to the service drop. -
ANSWER ✔✔Service entrance conductors, overhead system
