MASTER ELECTRICIAN CLASS EXAM QUESTIONS AND ANSWERS
branch circuit - CORRECT ANSWER✅✅That portion of a wiring system extending beyond the final
overcurrent device is called the:
Calculated load - CORRECT ANSWER✅✅The final sum of the computed loads, based on the minimum
code requirements, is the
Resistance - CORRECT ANSWER✅✅As compared to #10, a #8 wire of the same Iength has less:
0.001 inch - CORRECT ANSWER✅✅One circular mil is the area of a circle whose diameter is:
1,000,000 CM - CORRECT ANSWER✅✅6. A round bus-bar one inch in diameter, has a circular mil area
of:
four times as great - CORRECT ANSWER✅✅7. A copper wire with twice the diameter of another wire
has a current carrying capacity:
10.4 - CORRECT ANSWER✅✅The specific resistance of copper wire @ 20° C in ohms per circular mil ft.
is
permit current to flow - CORRECT ANSWER✅✅Conductance of an electric circuit is that property that
will:
1O ohms - CORRECT ANSWER✅✅The equivalent value of 0.1 mho is
directly proportional to its length - CORRECT ANSWER✅✅13. The resistance of copper wire is:
Feeder - CORRECT ANSWER✅✅The portion of a wiring system between a point of distribution and the
branch circuit overcurrent device is
,locking - CORRECT ANSWER✅✅GFCI protection at a carnival is not required for equipment at circuit if
the receptacle is of the ____________type
not less than 1 1/4 in. from - CORRECT ANSWER✅✅3. Where cables or nonmetallic raceways are
installed through bored.holes in joists, rafters, or wood members;holes shall be bored so that the edge
of the hole is the nearest edge -of the wood member.
located on a balcony accessible only to qualified persons
located in a room only accessible to
qualified persons
elevated 8 ft or more above floor or other working surface - CORRECT ANSWER✅✅4. To guard live
parts over 50V but less than 600V, equipment is permitted to be
12Ft - CORRECT ANSWER✅✅6. Overhead feeder conductors shall have a minimum __________ vertical
clearance over residential property and driveways, as well as those commercial areas not subject to
truck traffic, where the voltage is limited to 300 volts-to-ground.
36 inches - CORRECT ANSWER✅✅Where rear access is required to work on de-energized parts on the
back of enclosed equipment, a minimum working space of horizontally shall be provided.
50' - CORRECT ANSWER✅✅What is the maximum run length of a 18AWG fixture wire that is tapped on
to a 20 amp branch circuit?
power supply failure - CORRECT ANSWER✅✅When the service disconnecting means is a power-
operated switch or circuit breaker, it shall be able to be opened by hand in the event of a
2 in of concrete - CORRECT ANSWER✅✅Conductors are considered outside a buildings when they are
buried under not less than
8 - CORRECT ANSWER✅✅In straight pull, the length of the box shall not be less than. ____times the
trade size of the largest raceway.
, 18" - CORRECT ANSWER✅✅At least one receptacle outlet shall be installed within of the top of a show
window for each 12 linear feet measured horizontally across its length
1000A - CORRECT ANSWER✅✅Ground-fault protection of equipment shall be provided fro solidly
grounded wye electrical services of more than 150 volts-to-ground, but not exceeding 600V phase-
to..phase for each service disconnecting means rated
18" - CORRECT ANSWER✅✅Receptacle outlets in floors shall not be counted as part of the required
number of receptacle outlets unless located within ______ of the wall
50V - CORRECT ANSWER✅✅Exposed live parts of motors and controllers operating at or more between
terminals shall be guarded against accidental contact by enclosure or by location
5' - CORRECT ANSWER✅✅Lighting track shall not be installed less than______ above the finished floor
except' where protected from physical damage or where the track operates at less than 30 V rms, open-
circuit voltage
4 - CORRECT ANSWER✅✅18. Each general care area patient bed location shall be provided with a
minimum of_______receptacles, which can be single, duplex, or a combination with each duplex
counting as two receptacles
Combination Range hood/ Microwave
oven - CORRECT ANSWER✅✅In a Dwelling Unit which appliance is allowed to have a 24" cord with
attachment ground plug?
1 - CORRECT ANSWER✅✅At least_____ 125 V, single phase, 15 A or 20 A, duplex with ground-fault
circuit interrupter receptacle shall be provided in each elevator machine room and elevator machinery
space.
25A - CORRECT ANSWER✅✅21. Lighting systems covered by Article 411 shall have a power supply
rated not more than______and not more than 30V
branch circuit - CORRECT ANSWER✅✅That portion of a wiring system extending beyond the final
overcurrent device is called the:
Calculated load - CORRECT ANSWER✅✅The final sum of the computed loads, based on the minimum
code requirements, is the
Resistance - CORRECT ANSWER✅✅As compared to #10, a #8 wire of the same Iength has less:
0.001 inch - CORRECT ANSWER✅✅One circular mil is the area of a circle whose diameter is:
1,000,000 CM - CORRECT ANSWER✅✅6. A round bus-bar one inch in diameter, has a circular mil area
of:
four times as great - CORRECT ANSWER✅✅7. A copper wire with twice the diameter of another wire
has a current carrying capacity:
10.4 - CORRECT ANSWER✅✅The specific resistance of copper wire @ 20° C in ohms per circular mil ft.
is
permit current to flow - CORRECT ANSWER✅✅Conductance of an electric circuit is that property that
will:
1O ohms - CORRECT ANSWER✅✅The equivalent value of 0.1 mho is
directly proportional to its length - CORRECT ANSWER✅✅13. The resistance of copper wire is:
Feeder - CORRECT ANSWER✅✅The portion of a wiring system between a point of distribution and the
branch circuit overcurrent device is
,locking - CORRECT ANSWER✅✅GFCI protection at a carnival is not required for equipment at circuit if
the receptacle is of the ____________type
not less than 1 1/4 in. from - CORRECT ANSWER✅✅3. Where cables or nonmetallic raceways are
installed through bored.holes in joists, rafters, or wood members;holes shall be bored so that the edge
of the hole is the nearest edge -of the wood member.
located on a balcony accessible only to qualified persons
located in a room only accessible to
qualified persons
elevated 8 ft or more above floor or other working surface - CORRECT ANSWER✅✅4. To guard live
parts over 50V but less than 600V, equipment is permitted to be
12Ft - CORRECT ANSWER✅✅6. Overhead feeder conductors shall have a minimum __________ vertical
clearance over residential property and driveways, as well as those commercial areas not subject to
truck traffic, where the voltage is limited to 300 volts-to-ground.
36 inches - CORRECT ANSWER✅✅Where rear access is required to work on de-energized parts on the
back of enclosed equipment, a minimum working space of horizontally shall be provided.
50' - CORRECT ANSWER✅✅What is the maximum run length of a 18AWG fixture wire that is tapped on
to a 20 amp branch circuit?
power supply failure - CORRECT ANSWER✅✅When the service disconnecting means is a power-
operated switch or circuit breaker, it shall be able to be opened by hand in the event of a
2 in of concrete - CORRECT ANSWER✅✅Conductors are considered outside a buildings when they are
buried under not less than
8 - CORRECT ANSWER✅✅In straight pull, the length of the box shall not be less than. ____times the
trade size of the largest raceway.
, 18" - CORRECT ANSWER✅✅At least one receptacle outlet shall be installed within of the top of a show
window for each 12 linear feet measured horizontally across its length
1000A - CORRECT ANSWER✅✅Ground-fault protection of equipment shall be provided fro solidly
grounded wye electrical services of more than 150 volts-to-ground, but not exceeding 600V phase-
to..phase for each service disconnecting means rated
18" - CORRECT ANSWER✅✅Receptacle outlets in floors shall not be counted as part of the required
number of receptacle outlets unless located within ______ of the wall
50V - CORRECT ANSWER✅✅Exposed live parts of motors and controllers operating at or more between
terminals shall be guarded against accidental contact by enclosure or by location
5' - CORRECT ANSWER✅✅Lighting track shall not be installed less than______ above the finished floor
except' where protected from physical damage or where the track operates at less than 30 V rms, open-
circuit voltage
4 - CORRECT ANSWER✅✅18. Each general care area patient bed location shall be provided with a
minimum of_______receptacles, which can be single, duplex, or a combination with each duplex
counting as two receptacles
Combination Range hood/ Microwave
oven - CORRECT ANSWER✅✅In a Dwelling Unit which appliance is allowed to have a 24" cord with
attachment ground plug?
1 - CORRECT ANSWER✅✅At least_____ 125 V, single phase, 15 A or 20 A, duplex with ground-fault
circuit interrupter receptacle shall be provided in each elevator machine room and elevator machinery
space.
25A - CORRECT ANSWER✅✅21. Lighting systems covered by Article 411 shall have a power supply
rated not more than______and not more than 30V
