MASTER ELECTRICIAN EXAM PREP STUDY
GUIDE PRACTICE QUESTIONS AND
ACCURATE SOLUTIONS
●● Calculated load.
Answer: The final sum of the computed loads, based on the minimum
code requirements, is the
●● Resistance.
Answer: As compared to #10, a #8 wire of the same Iength has less:
●● 0.001 inch.
Answer: One circular mil is the area of a circle whose diameter is:
●● 1,000,000 CM.
Answer: 6. A round bus-bar one inch in diameter, has a circular mil area
of:
●● four times as great.
Answer: 7. A copper wire with twice the diameter of another wire has a
current carrying capacity:
,●● 10.4.
Answer: The specific resistance of copper wire @ 20° C in ohms per
circular mil ft. is
●● permit current to flow.
Answer: Conductance of an electric circuit is that property that will:
●● 1O ohms.
Answer: The equivalent value of 0.1 mho is
●● directly proportional to its length.
Answer: 13. The resistance of copper wire is:
●● Feeder.
Answer: The portion of a wiring system between a point of distribution
and the branch circuit overcurrent device is
●● locking.
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.
,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.
Answer: 4. To guard live parts over 50V but less than 600V, equipment
is permitted to be
●● 12Ft.
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.
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'.
, 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.
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.
Answer: Conductors are considered outside a buildings when they are
buried under not less than
●● 8.
Answer: In straight pull, the length of the box shall not be less than.
____times the trade size of the largest raceway.
●● 18".
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.
Answer: Ground-fault protection of equipment shall be provided fro
solidly grounded wye electrical services of more than 150 volts-to-
GUIDE PRACTICE QUESTIONS AND
ACCURATE SOLUTIONS
●● Calculated load.
Answer: The final sum of the computed loads, based on the minimum
code requirements, is the
●● Resistance.
Answer: As compared to #10, a #8 wire of the same Iength has less:
●● 0.001 inch.
Answer: One circular mil is the area of a circle whose diameter is:
●● 1,000,000 CM.
Answer: 6. A round bus-bar one inch in diameter, has a circular mil area
of:
●● four times as great.
Answer: 7. A copper wire with twice the diameter of another wire has a
current carrying capacity:
,●● 10.4.
Answer: The specific resistance of copper wire @ 20° C in ohms per
circular mil ft. is
●● permit current to flow.
Answer: Conductance of an electric circuit is that property that will:
●● 1O ohms.
Answer: The equivalent value of 0.1 mho is
●● directly proportional to its length.
Answer: 13. The resistance of copper wire is:
●● Feeder.
Answer: The portion of a wiring system between a point of distribution
and the branch circuit overcurrent device is
●● locking.
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.
,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.
Answer: 4. To guard live parts over 50V but less than 600V, equipment
is permitted to be
●● 12Ft.
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.
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'.
, 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.
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.
Answer: Conductors are considered outside a buildings when they are
buried under not less than
●● 8.
Answer: In straight pull, the length of the box shall not be less than.
____times the trade size of the largest raceway.
●● 18".
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.
Answer: Ground-fault protection of equipment shall be provided fro
solidly grounded wye electrical services of more than 150 volts-to-
