Master Electrician License Prep Test Bank
with 350 Practice Questions and Correct
Answers/ Master Electrician License Latest
Practice Test Bank 2026-2027 (New!)
What is a Master Electrician?
A) A licensed professional who has extensive knowledge and experience in
electrical systems, capable of designing, installing, and maintaining electrical
systems and supervising other electricians
B) An entry-level electrician who performs basic wiring tasks
C) A person who only installs residential lighting fixtures
D) A technician who repairs appliances
-ANSWER- A
What are the key responsibilities of a Master Electrician?
A) Only installing new electrical panels
B) Key responsibilities include overseeing electrical projects, ensuring compliance
with electrical codes, conducting inspections, troubleshooting electrical issues, and
training apprentices
C) Only pulling permits for electrical work
D) Only cleaning job sites
-ANSWER- B
What knowledge is required for a Master Electrician?
A) Knowledge of plumbing and HVAC systems only
B) Knowledge of electrical codes, safety standards, advanced circuitry, electrical
theory, and local regulations
C) Knowledge of carpentry only
D) Knowledge of masonry only
-ANSWER- B
What are common licensing requirements for a Master Electrician?
A) Only passing a written test
1
,B) Common licensing requirements include completing a certain number of hours
of work experience, passing a licensing exam, and obtaining any necessary state or
local permits
C) Only paying a licensing fee
D) Only having a high school diploma
-ANSWER- B
Given: A motor-control circuit is tapped from the load side of the motor short-
circuit protective device. The control circuit conductors are 14 AWG THWN
copper. The conductors require only short-circuit protection and do not extend
beyond the motor-control equipment enclosure. The maximum overcurrent
protection permitted for this motor-control conduit is ____________ amperes.
A) 50
B) 75
C) 100
D) 125
-ANSWER- C
Given: The CONTROLLER is not a molded case switch or an inverse-time circuit.
The motor controlled for a 120-hp motor must be RATED at not less than
_____________ hp.
A) 100
B) 115
C) 120
D) 125
-ANSWER- C
Given: An inverse-time circuit breaker is used to protect a hermetic motor-
compressor from overload. The inverse-time circuit breaker shall be rated at a
maximum of __________ percent of rated load current.
A) 115
B) 125
C) 140
D) 150
-ANSWER- A
Disregarding any exceptions, the MAXIMUM PERMITTED OPERATIONAL
SETTING OF AN ADJUSTABLE INVERSE-TIME breaker PROTECTING A
10hp, 208-VOLT, 3 PHASE SQUIRREL CAGE MOTOR BRANCH CIRCUIT IS
2
,______________ amperes.
A) 65.0
B) 70.0
C) 77.0
D) 85.0
-ANSWER- C
Given: THREE MOTORS with FULL-LOAD ampere rating of 10 amperes, 20
amperes, and 30 amperes are fed by one feeder. The motor-feeder conductors must
have an ampacity of at least ___________ amperes.
A) 50.0
B) 55.0
C) 60.0
D) 67.5
-ANSWER- D
When the design and operation of the GENERATOR will prevent overloading, the
conductors shall not be less than:
A) 100%
B) 115%
C) 125%
D) 150%
-ANSWER- A
The maximum overload-protection device rating, responsive to motor current
permitted by the NEC for a 25-hp, 208-volt, 3 phase induction-type motor, marked
with a temperature rise of 50 degrees C, is ___________ amperes. (Assume no
special increase in size for starting current is required).
A) 62.4
B) 68.0
C) 74.8
D) 80.0
-ANSWER- C
The NEC specifically requires that the CRITICAL BRANCH of a HOSPITAL
emergency system shall provide power to all of the following areas EXCEPT:
A) electrical equipment rooms
B) critical care areas
C) operating rooms
3
, D) emergency rooms
-ANSWER- A
Given: Branch-circuit equipment grounding conductors serving receptacles for
SENSITIVE ELECTRONIC EQUIPMENT shall be grounded by means of an
equipment grounding conductor. The equipment grounding conductor shall be run
with the circuit conductors to an equipment grounding bus marked:
A) technical equipment ground
B) isolated ground
C) electronic ground
D) computer ground
-ANSWER- A
INSTRUMENTATION TRAY CABLE with 22 AWG conductors is permitted to
be used for circuits operating at a maximum of __________ amperes.
A) 1
B) 2
C) 3
D) 4
-ANSWER- C
Given: The conductor is 120 volt and supported by a grounded messenger wire.
The minimum clearance of insulated cable conductors above the water level of a
SWIMMING POOL is __________ feet.
A) 10.5
B) 12.5
C) 15.5
D) 22.5
-ANSWER- D
A 12 foot run of horizontal conduit between two enclosures (one is dust- and
ignition-proof and the other is not) located in a Class II, Division I location is
required to have a minimum of how many sealing fittings?
A) 0
B) 1
C) 2
D) 3
-ANSWER- A
4
with 350 Practice Questions and Correct
Answers/ Master Electrician License Latest
Practice Test Bank 2026-2027 (New!)
What is a Master Electrician?
A) A licensed professional who has extensive knowledge and experience in
electrical systems, capable of designing, installing, and maintaining electrical
systems and supervising other electricians
B) An entry-level electrician who performs basic wiring tasks
C) A person who only installs residential lighting fixtures
D) A technician who repairs appliances
-ANSWER- A
What are the key responsibilities of a Master Electrician?
A) Only installing new electrical panels
B) Key responsibilities include overseeing electrical projects, ensuring compliance
with electrical codes, conducting inspections, troubleshooting electrical issues, and
training apprentices
C) Only pulling permits for electrical work
D) Only cleaning job sites
-ANSWER- B
What knowledge is required for a Master Electrician?
A) Knowledge of plumbing and HVAC systems only
B) Knowledge of electrical codes, safety standards, advanced circuitry, electrical
theory, and local regulations
C) Knowledge of carpentry only
D) Knowledge of masonry only
-ANSWER- B
What are common licensing requirements for a Master Electrician?
A) Only passing a written test
1
,B) Common licensing requirements include completing a certain number of hours
of work experience, passing a licensing exam, and obtaining any necessary state or
local permits
C) Only paying a licensing fee
D) Only having a high school diploma
-ANSWER- B
Given: A motor-control circuit is tapped from the load side of the motor short-
circuit protective device. The control circuit conductors are 14 AWG THWN
copper. The conductors require only short-circuit protection and do not extend
beyond the motor-control equipment enclosure. The maximum overcurrent
protection permitted for this motor-control conduit is ____________ amperes.
A) 50
B) 75
C) 100
D) 125
-ANSWER- C
Given: The CONTROLLER is not a molded case switch or an inverse-time circuit.
The motor controlled for a 120-hp motor must be RATED at not less than
_____________ hp.
A) 100
B) 115
C) 120
D) 125
-ANSWER- C
Given: An inverse-time circuit breaker is used to protect a hermetic motor-
compressor from overload. The inverse-time circuit breaker shall be rated at a
maximum of __________ percent of rated load current.
A) 115
B) 125
C) 140
D) 150
-ANSWER- A
Disregarding any exceptions, the MAXIMUM PERMITTED OPERATIONAL
SETTING OF AN ADJUSTABLE INVERSE-TIME breaker PROTECTING A
10hp, 208-VOLT, 3 PHASE SQUIRREL CAGE MOTOR BRANCH CIRCUIT IS
2
,______________ amperes.
A) 65.0
B) 70.0
C) 77.0
D) 85.0
-ANSWER- C
Given: THREE MOTORS with FULL-LOAD ampere rating of 10 amperes, 20
amperes, and 30 amperes are fed by one feeder. The motor-feeder conductors must
have an ampacity of at least ___________ amperes.
A) 50.0
B) 55.0
C) 60.0
D) 67.5
-ANSWER- D
When the design and operation of the GENERATOR will prevent overloading, the
conductors shall not be less than:
A) 100%
B) 115%
C) 125%
D) 150%
-ANSWER- A
The maximum overload-protection device rating, responsive to motor current
permitted by the NEC for a 25-hp, 208-volt, 3 phase induction-type motor, marked
with a temperature rise of 50 degrees C, is ___________ amperes. (Assume no
special increase in size for starting current is required).
A) 62.4
B) 68.0
C) 74.8
D) 80.0
-ANSWER- C
The NEC specifically requires that the CRITICAL BRANCH of a HOSPITAL
emergency system shall provide power to all of the following areas EXCEPT:
A) electrical equipment rooms
B) critical care areas
C) operating rooms
3
, D) emergency rooms
-ANSWER- A
Given: Branch-circuit equipment grounding conductors serving receptacles for
SENSITIVE ELECTRONIC EQUIPMENT shall be grounded by means of an
equipment grounding conductor. The equipment grounding conductor shall be run
with the circuit conductors to an equipment grounding bus marked:
A) technical equipment ground
B) isolated ground
C) electronic ground
D) computer ground
-ANSWER- A
INSTRUMENTATION TRAY CABLE with 22 AWG conductors is permitted to
be used for circuits operating at a maximum of __________ amperes.
A) 1
B) 2
C) 3
D) 4
-ANSWER- C
Given: The conductor is 120 volt and supported by a grounded messenger wire.
The minimum clearance of insulated cable conductors above the water level of a
SWIMMING POOL is __________ feet.
A) 10.5
B) 12.5
C) 15.5
D) 22.5
-ANSWER- D
A 12 foot run of horizontal conduit between two enclosures (one is dust- and
ignition-proof and the other is not) located in a Class II, Division I location is
required to have a minimum of how many sealing fittings?
A) 0
B) 1
C) 2
D) 3
-ANSWER- A
4
