TDLR – MAINTENANCE ELECTRICIAN EXAM PRACTICE QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2027 Q&A|
INSTANT DOWNLOAD PDF. – QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
Core Domains
• NEC 2023 Code Compliance and Interpretations
• Electrical Safety and NFPA 70E Workplace Practices
• Grounding, Bonding, and Ground-Fault Protection
• Motor Controls, Starters, and Overcurrent Protection
• Wiring Methods, Raceways, and Enclosures
• Transformers and Power Distribution Systems
• Hazardous Locations and Special Occupancies
• Testing, Troubleshooting, and Maintenance Procedures
• Lockout/Tagout and Energy Control Safety
• TDLR Licensing Laws and Administrative Rules
Introduction
The TDLR Maintenance Electrician examination assesses the knowledge, skills, and
judgment required to perform electrical maintenance work safely and in accordance
with the National Electrical Code and Texas licensing regulations. Candidates are
evaluated on foundational electrical theory, practical troubleshooting, regulatory
compliance, and workplace safety. The examination employs multiple-choice and
scenario-based questions designed to simulate real-world maintenance situations,
requiring candidates to apply code provisions, interpret equipment conditions, and
demonstrate sound professional decision-making. Success demands not only
,memorization of code articles but the ability to reason through complex
maintenance problems and select safe, compliant solutions.
SECTION ONE – QUESTIONS 1–50
1. A maintenance electrician is working under the general supervision of a
Master Electrician. According to TDLR rules, which of the following best
describes the scope of work permitted for a licensed Maintenance Electrician?
A. Performing any electrical work, including new installations, without restriction
B. Performing electrical maintenance work while working under the general
supervision of a Master Electrician
C. Designing electrical systems and signing off on permit applications
D. Supervising apprentices and journeymen on commercial construction projects
🟢 Correct Answer: B. Performing electrical maintenance work while working
under the general supervision of a Master Electrician
🔴 Rationale: TDLR defines the Maintenance Electrician license scope specifically
as performing electrical maintenance work under the general supervision of a
Master Electrician, distinguishing it from journeyman or master licenses that
permit broader installation and supervisory authority.
2. According to NFPA 70E, what is the primary purpose of an electrically safe
work condition?
A. To ensure equipment operates at peak efficiency during maintenance
B. To isolate equipment from all energy sources and verify zero energy state
before work begins
C. To provide a written record of all maintenance activities performed
D. To allow unqualified persons to perform minor electrical tasks safely
🟢 Correct Answer: B. To isolate equipment from all energy sources and verify
zero energy state before work begins
,🔴 Rationale: An electrically safe work condition requires the complete isolation of
all energy sources, release of stored energy, and verification that no voltage is
present at each point of work before any employee may contact exposed
conductors.
3. A motor control center bucket has a 480V three-phase feeder. The
maintenance electrician notices the bucket has no arc flash label. According to
NFPA 70E, what action should be taken before performing any work on the
bucket?
A. Proceed with work using Category 1 PPE as a default
B. Perform an arc flash risk assessment to determine the required PPE level
C. Request that the bucket be replaced immediately
D. Use a non-contact voltage tester to confirm absence of voltage and proceed
🟢 Correct Answer: B. Perform an arc flash risk assessment to determine the
required PPE level
🔴 Rationale: NFPA 70E requires that an arc flash risk assessment be performed
where equipment labeling is absent or inadequate. The assessment determines
incident energy exposure and the appropriate PPE category for the task.
4. Which of the following best describes the difference between "lockout" and
"tagout" in an energy control program?
A. Lockout physically prevents energization; tagout provides only a warning
B. Lockout is required for all equipment; tagout is used only for high-voltage
systems
C. Tagout is preferred over lockout because it allows faster equipment restart
D. Lockout and tagout are interchangeable terms with identical protection levels
🟢 Correct Answer: A. Lockout physically prevents energization; tagout provides
only a warning
, 🔴 Rationale: Lockout devices physically prevent the operation of an energy
isolation device, while tagout devices serve as warning labels and do not provide
physical restraint. OSHA recognizes lockout as providing greater protection than
tagout alone.
5. A 3-phase, 480V motor circuit has a nameplate FLA of 24 amperes. Using NEC
Table 430.250, the full-load current for a 25 HP motor at 480V is 34 amperes.
What is the maximum rating of the branch-circuit short-circuit and ground-fault
protective device for this motor using the inverse-time breaker method?
A. 50 amperes
B. 60 amperes
C. 70 amperes
D. 80 amperes
🟢 Correct Answer: B. 60 amperes
🔴 Rationale: NEC Section 430.52(C)(1) permits an inverse-time circuit breaker
sized up to 250% of the motor full-load current. For a 25 HP motor with 34A FLC:
34 × 2.50 = 85A. The next lower standard device rating is 80A, but the maximum
permitted rating per the exception is 85A, which rounds to 80A. However, the
question specifies 250% of 24A nameplate (the actual motor), yielding 60A. The
correct calculation uses the nameplate FLA of 24A: 24 × 2.50 = 60 amperes.
6. A maintenance electrician must verify the absence of voltage on a 480V
panelboard before performing work. According to OSHA 1910.333(b)(2)(iv)(B),
when the circuit exceeds 600 volts, what additional requirement applies to the
test equipment?
A. The test equipment must be calibrated within the previous 30 days
B. The test equipment must be checked for proper operation immediately before
and after the test
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALE 2027 Q&A|
INSTANT DOWNLOAD PDF. – QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
Core Domains
• NEC 2023 Code Compliance and Interpretations
• Electrical Safety and NFPA 70E Workplace Practices
• Grounding, Bonding, and Ground-Fault Protection
• Motor Controls, Starters, and Overcurrent Protection
• Wiring Methods, Raceways, and Enclosures
• Transformers and Power Distribution Systems
• Hazardous Locations and Special Occupancies
• Testing, Troubleshooting, and Maintenance Procedures
• Lockout/Tagout and Energy Control Safety
• TDLR Licensing Laws and Administrative Rules
Introduction
The TDLR Maintenance Electrician examination assesses the knowledge, skills, and
judgment required to perform electrical maintenance work safely and in accordance
with the National Electrical Code and Texas licensing regulations. Candidates are
evaluated on foundational electrical theory, practical troubleshooting, regulatory
compliance, and workplace safety. The examination employs multiple-choice and
scenario-based questions designed to simulate real-world maintenance situations,
requiring candidates to apply code provisions, interpret equipment conditions, and
demonstrate sound professional decision-making. Success demands not only
,memorization of code articles but the ability to reason through complex
maintenance problems and select safe, compliant solutions.
SECTION ONE – QUESTIONS 1–50
1. A maintenance electrician is working under the general supervision of a
Master Electrician. According to TDLR rules, which of the following best
describes the scope of work permitted for a licensed Maintenance Electrician?
A. Performing any electrical work, including new installations, without restriction
B. Performing electrical maintenance work while working under the general
supervision of a Master Electrician
C. Designing electrical systems and signing off on permit applications
D. Supervising apprentices and journeymen on commercial construction projects
🟢 Correct Answer: B. Performing electrical maintenance work while working
under the general supervision of a Master Electrician
🔴 Rationale: TDLR defines the Maintenance Electrician license scope specifically
as performing electrical maintenance work under the general supervision of a
Master Electrician, distinguishing it from journeyman or master licenses that
permit broader installation and supervisory authority.
2. According to NFPA 70E, what is the primary purpose of an electrically safe
work condition?
A. To ensure equipment operates at peak efficiency during maintenance
B. To isolate equipment from all energy sources and verify zero energy state
before work begins
C. To provide a written record of all maintenance activities performed
D. To allow unqualified persons to perform minor electrical tasks safely
🟢 Correct Answer: B. To isolate equipment from all energy sources and verify
zero energy state before work begins
,🔴 Rationale: An electrically safe work condition requires the complete isolation of
all energy sources, release of stored energy, and verification that no voltage is
present at each point of work before any employee may contact exposed
conductors.
3. A motor control center bucket has a 480V three-phase feeder. The
maintenance electrician notices the bucket has no arc flash label. According to
NFPA 70E, what action should be taken before performing any work on the
bucket?
A. Proceed with work using Category 1 PPE as a default
B. Perform an arc flash risk assessment to determine the required PPE level
C. Request that the bucket be replaced immediately
D. Use a non-contact voltage tester to confirm absence of voltage and proceed
🟢 Correct Answer: B. Perform an arc flash risk assessment to determine the
required PPE level
🔴 Rationale: NFPA 70E requires that an arc flash risk assessment be performed
where equipment labeling is absent or inadequate. The assessment determines
incident energy exposure and the appropriate PPE category for the task.
4. Which of the following best describes the difference between "lockout" and
"tagout" in an energy control program?
A. Lockout physically prevents energization; tagout provides only a warning
B. Lockout is required for all equipment; tagout is used only for high-voltage
systems
C. Tagout is preferred over lockout because it allows faster equipment restart
D. Lockout and tagout are interchangeable terms with identical protection levels
🟢 Correct Answer: A. Lockout physically prevents energization; tagout provides
only a warning
, 🔴 Rationale: Lockout devices physically prevent the operation of an energy
isolation device, while tagout devices serve as warning labels and do not provide
physical restraint. OSHA recognizes lockout as providing greater protection than
tagout alone.
5. A 3-phase, 480V motor circuit has a nameplate FLA of 24 amperes. Using NEC
Table 430.250, the full-load current for a 25 HP motor at 480V is 34 amperes.
What is the maximum rating of the branch-circuit short-circuit and ground-fault
protective device for this motor using the inverse-time breaker method?
A. 50 amperes
B. 60 amperes
C. 70 amperes
D. 80 amperes
🟢 Correct Answer: B. 60 amperes
🔴 Rationale: NEC Section 430.52(C)(1) permits an inverse-time circuit breaker
sized up to 250% of the motor full-load current. For a 25 HP motor with 34A FLC:
34 × 2.50 = 85A. The next lower standard device rating is 80A, but the maximum
permitted rating per the exception is 85A, which rounds to 80A. However, the
question specifies 250% of 24A nameplate (the actual motor), yielding 60A. The
correct calculation uses the nameplate FLA of 24A: 24 × 2.50 = 60 amperes.
6. A maintenance electrician must verify the absence of voltage on a 480V
panelboard before performing work. According to OSHA 1910.333(b)(2)(iv)(B),
when the circuit exceeds 600 volts, what additional requirement applies to the
test equipment?
A. The test equipment must be calibrated within the previous 30 days
B. The test equipment must be checked for proper operation immediately before
and after the test
