Texas Master Electrician Examination
Practice Exam 2026 | 100 Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Reduce installation costs
B. Standardize electrical equipment brands
C. Provide practical safeguarding of persons and property from electrical
hazards
D. Eliminate the need for inspections
Answer: C. Provide practical safeguarding of persons and property from
electrical hazards
Rationale: The NEC is intended to protect people and property from hazards
arising from the use of electricity through minimum installation standards.
2. According to the NEC, electrical equipment shall be installed in a neat and
workmanlike manner. Which article contains this requirement?
A. Article 90
B. Article 110
, C. Article 250
D. Article 300
Answer: B. Article 110
Rationale: Article 110 contains general requirements for electrical installations,
including workmanship and installation practices.
3. Which conductor is intentionally connected to earth?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded conductor
D. Grounding electrode conductor
Answer: C. Grounded conductor
Rationale: The grounded conductor is intentionally connected to earth, usually
the neutral conductor in AC systems.
4. Copper conductors generally have what advantage over aluminum
conductors?
A. Lower cost
B. Lighter weight
C. Higher conductivity
D. Larger diameter
Answer: C. Higher conductivity
Rationale: Copper provides greater electrical conductivity and mechanical
strength than aluminum of the same size.
, 5. Which device provides protection against overloads and short circuits?
A. Switch
B. Receptacle
C. Circuit breaker
D. Transformer
Answer: C. Circuit breaker
Rationale: Circuit breakers automatically interrupt current during overload or
short-circuit conditions.
6. What is voltage?
A. Current flow
B. Resistance to current
C. Power consumption
D. Electrical potential difference
Answer: D. Electrical potential difference
Rationale: Voltage is the electrical pressure that drives current through a circuit.
7. Ohm's Law states that current equals:
A. Voltage × Resistance
B. Voltage² ÷ Resistance
C. Voltage ÷ Resistance
D. Resistance ÷ Voltage
Answer: C. Voltage ÷ Resistance
Rationale: Ohm's Law is expressed as I = V ÷ R.
, 8. Electrical power is measured in:
A. Volts
B. Amperes
C. Ohms
D. Watts
Answer: D. Watts
Rationale: Electrical power equals voltage multiplied by current.
9. Bonding is intended to:
A. Increase resistance
B. Reduce voltage
C. Ensure electrical continuity and fault current path
D. Eliminate grounding
Answer: C. Ensure electrical continuity and fault current path
Rationale: Bonding creates an effective fault current path for overcurrent
devices to operate properly.
10.Which NEC chapter primarily covers wiring methods?
A. Chapter 1
B. Chapter 2
C. Chapter 3
D. Chapter 8
Answer: C. Chapter 3
Rationale: Chapter 3 contains wiring methods, conductors, raceways, and cable
requirements.
Practice Exam 2026 | 100 Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. What is the primary purpose of the National Electrical Code (NEC)?
A. Reduce installation costs
B. Standardize electrical equipment brands
C. Provide practical safeguarding of persons and property from electrical
hazards
D. Eliminate the need for inspections
Answer: C. Provide practical safeguarding of persons and property from
electrical hazards
Rationale: The NEC is intended to protect people and property from hazards
arising from the use of electricity through minimum installation standards.
2. According to the NEC, electrical equipment shall be installed in a neat and
workmanlike manner. Which article contains this requirement?
A. Article 90
B. Article 110
, C. Article 250
D. Article 300
Answer: B. Article 110
Rationale: Article 110 contains general requirements for electrical installations,
including workmanship and installation practices.
3. Which conductor is intentionally connected to earth?
A. Equipment grounding conductor
B. Bonding jumper
C. Grounded conductor
D. Grounding electrode conductor
Answer: C. Grounded conductor
Rationale: The grounded conductor is intentionally connected to earth, usually
the neutral conductor in AC systems.
4. Copper conductors generally have what advantage over aluminum
conductors?
A. Lower cost
B. Lighter weight
C. Higher conductivity
D. Larger diameter
Answer: C. Higher conductivity
Rationale: Copper provides greater electrical conductivity and mechanical
strength than aluminum of the same size.
, 5. Which device provides protection against overloads and short circuits?
A. Switch
B. Receptacle
C. Circuit breaker
D. Transformer
Answer: C. Circuit breaker
Rationale: Circuit breakers automatically interrupt current during overload or
short-circuit conditions.
6. What is voltage?
A. Current flow
B. Resistance to current
C. Power consumption
D. Electrical potential difference
Answer: D. Electrical potential difference
Rationale: Voltage is the electrical pressure that drives current through a circuit.
7. Ohm's Law states that current equals:
A. Voltage × Resistance
B. Voltage² ÷ Resistance
C. Voltage ÷ Resistance
D. Resistance ÷ Voltage
Answer: C. Voltage ÷ Resistance
Rationale: Ohm's Law is expressed as I = V ÷ R.
, 8. Electrical power is measured in:
A. Volts
B. Amperes
C. Ohms
D. Watts
Answer: D. Watts
Rationale: Electrical power equals voltage multiplied by current.
9. Bonding is intended to:
A. Increase resistance
B. Reduce voltage
C. Ensure electrical continuity and fault current path
D. Eliminate grounding
Answer: C. Ensure electrical continuity and fault current path
Rationale: Bonding creates an effective fault current path for overcurrent
devices to operate properly.
10.Which NEC chapter primarily covers wiring methods?
A. Chapter 1
B. Chapter 2
C. Chapter 3
D. Chapter 8
Answer: C. Chapter 3
Rationale: Chapter 3 contains wiring methods, conductors, raceways, and cable
requirements.
