Texas Master Electrician Examination
Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary purpose of the Texas Master Electrician
license?
A. To authorize only residential electrical work
B. To authorize qualified individuals to perform and supervise electrical
work at the master level
C. To authorize plumbing installations
D. To replace all local permitting requirements
Answer: B. To authorize qualified individuals to perform and
supervise electrical work at the master level
Rationale: A master electrician credential demonstrates advanced
electrical knowledge and competency. It does not eliminate applicable
permits, inspections, code requirements, or other legal responsibilities.
2. Which electrical code is the primary technical reference for most
electrical installations?
A. International Plumbing Code
B. National Electrical Code
C. International Fuel Gas Code
D. Uniform Mechanical Code
Answer: B. National Electrical Code
,Rationale: The National Electrical Code, commonly called the NEC or
NFPA 70, establishes widely adopted requirements for electrical
installations.
3. What is the fundamental purpose of overcurrent protection?
A. Increase conductor resistance
B. Prevent excessive current from damaging conductors and equipment
C. Increase available fault current
D. Eliminate the need for grounding
Answer: B. Prevent excessive current from damaging conductors
and equipment
Rationale: Overcurrent devices protect conductors and equipment
against excessive current caused by overloads, short circuits, or
ground faults.
4. Which device is primarily intended to protect people from
dangerous ground-fault current?
A. Standard fuse
B. GFCI
C. Disconnect switch
D. Transformer
Answer: B. GFCI
Rationale: A ground-fault circuit-interrupter monitors current
imbalance and rapidly interrupts the circuit when leakage current
reaches its trip threshold.
5. What does NEC Article 110 generally address?
A. Motors
B. General requirements for electrical installations
,C. Swimming pools only
D. Emergency generators only
Answer: B. General requirements for electrical installations
Rationale: Article 110 contains important requirements concerning
examination, installation, electrical connections, working space, and
equipment requirements.
6. Which conductor normally carries current back to the source in a
single-phase circuit?
A. Equipment grounding conductor
B. Grounding electrode conductor
C. Neutral or grounded conductor
D. Bonding jumper
Answer: C. Neutral or grounded conductor
Rationale: In a typical single-phase circuit, the grounded conductor
provides the intentional return path for current from the load back
toward the source.
7. What is the primary purpose of an equipment grounding
conductor?
A. Carry normal load current
B. Provide a low-impedance fault-current path
C. Increase voltage
D. Reduce conductor ampacity
Answer: B. Provide a low-impedance fault-current path
Rationale: The equipment grounding conductor provides a conductive
path intended to facilitate operation of the overcurrent device during a
fault.
, 8. Which electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Answer: C. Voltage
Rationale: Voltage is electrical potential difference and is measured in
volts. Current is measured in amperes, resistance in ohms, and power
in watts.
9. Which unit measures electrical current?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: B. Ampere
Rationale: The ampere, or amp, is the SI unit used to measure
electrical current.
10. Which formula represents Ohm's law?
A. P = VI
B. V = IR
C. E = mc²
D. W = Fd
Answer: B. V = IR
Rationale: Ohm's law states that voltage equals current multiplied by
resistance. This relationship is fundamental to electrical calculations.
Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary purpose of the Texas Master Electrician
license?
A. To authorize only residential electrical work
B. To authorize qualified individuals to perform and supervise electrical
work at the master level
C. To authorize plumbing installations
D. To replace all local permitting requirements
Answer: B. To authorize qualified individuals to perform and
supervise electrical work at the master level
Rationale: A master electrician credential demonstrates advanced
electrical knowledge and competency. It does not eliminate applicable
permits, inspections, code requirements, or other legal responsibilities.
2. Which electrical code is the primary technical reference for most
electrical installations?
A. International Plumbing Code
B. National Electrical Code
C. International Fuel Gas Code
D. Uniform Mechanical Code
Answer: B. National Electrical Code
,Rationale: The National Electrical Code, commonly called the NEC or
NFPA 70, establishes widely adopted requirements for electrical
installations.
3. What is the fundamental purpose of overcurrent protection?
A. Increase conductor resistance
B. Prevent excessive current from damaging conductors and equipment
C. Increase available fault current
D. Eliminate the need for grounding
Answer: B. Prevent excessive current from damaging conductors
and equipment
Rationale: Overcurrent devices protect conductors and equipment
against excessive current caused by overloads, short circuits, or
ground faults.
4. Which device is primarily intended to protect people from
dangerous ground-fault current?
A. Standard fuse
B. GFCI
C. Disconnect switch
D. Transformer
Answer: B. GFCI
Rationale: A ground-fault circuit-interrupter monitors current
imbalance and rapidly interrupts the circuit when leakage current
reaches its trip threshold.
5. What does NEC Article 110 generally address?
A. Motors
B. General requirements for electrical installations
,C. Swimming pools only
D. Emergency generators only
Answer: B. General requirements for electrical installations
Rationale: Article 110 contains important requirements concerning
examination, installation, electrical connections, working space, and
equipment requirements.
6. Which conductor normally carries current back to the source in a
single-phase circuit?
A. Equipment grounding conductor
B. Grounding electrode conductor
C. Neutral or grounded conductor
D. Bonding jumper
Answer: C. Neutral or grounded conductor
Rationale: In a typical single-phase circuit, the grounded conductor
provides the intentional return path for current from the load back
toward the source.
7. What is the primary purpose of an equipment grounding
conductor?
A. Carry normal load current
B. Provide a low-impedance fault-current path
C. Increase voltage
D. Reduce conductor ampacity
Answer: B. Provide a low-impedance fault-current path
Rationale: The equipment grounding conductor provides a conductive
path intended to facilitate operation of the overcurrent device during a
fault.
, 8. Which electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Answer: C. Voltage
Rationale: Voltage is electrical potential difference and is measured in
volts. Current is measured in amperes, resistance in ohms, and power
in watts.
9. Which unit measures electrical current?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: B. Ampere
Rationale: The ampere, or amp, is the SI unit used to measure
electrical current.
10. Which formula represents Ohm's law?
A. P = VI
B. V = IR
C. E = mc²
D. W = Fd
Answer: B. V = IR
Rationale: Ohm's law states that voltage equals current multiplied by
resistance. This relationship is fundamental to electrical calculations.
